KR102622509B1 - Coated rice seed and method for producing same - Google Patents

Abstract

There is provided a coated rice seed having a coating layer, wherein the coating layer includes zinc oxide, a surfactant, and at least one selected from the following group (A).
Group (A): A group consisting of acrylic resin, vinyl acetate resin, urethane resin, and butadiene copolymer.

Description

Coated rice seeds and method for producing the same {COATED RICE SEED AND METHOD FOR PRODUCING SAME}

The present invention relates to coated rice seeds and a method for producing the same.

Direct seeding of rice refers to a cultivation method in which rice seeds are directly sown in the rice field, and has the advantage of eliminating agricultural work because seedling and transplanting work is not required. On the other hand, it has the disadvantage of being susceptible to so-called delirium tremens by birds such as ducks and sparrows. Since a decrease in the seedling rate due to deliquescence causes a decrease in yield, measures to avoid deliquescence have been required. As a conventional deliquescence avoidance measure, for example, a method of preventing deliquescence using water management has been proposed. However, it is necessary to change the management method depending on the type of bird (see, for example, Non-Patent Document 1).

In addition, iron-coated freshwater direct seeding is known as a technical means of coating rice seeds with iron to prevent seeds from floating on the soil surface and preventing them from being eaten by sparrows (see, for example, non-patent document 2). However, since this technology utilizes the oxidation and solidification of iron, the management of coated rice seeds is cumbersome, as it is necessary to dissipate the heat generated by oxidation, and in cases where the management is not sufficient, There was a problem with the germination rate being low. As a solution to this problem, a method of coating rice seeds using coating materials such as polyvinyl alcohol and iron oxide with a high degree of saponification is known (see Patent Document 1).

Patent Document 1: JP 2013-146266 A1

Non-patent Document 1: Nagao SAKAI, et al., “Prevention of bird damage in the flowed paddy rice direct sowing cultivation”, The Hokuriku Crop Science, Crop Science Society of Japan, March 31, 1999, Vol. 34, p.59-61, Non-patent Document 2: Minoru YAMAUCHI, "A manual for direct sowing of iron-coated rice on a flooded paddy field 2010", The National Agriculture and Food Research Organization, Western Region Agricultural Research Center, March 2010.

However, the deliquescence prevention effect of iron oxide-coated rice seeds is not sufficient.

The object of the present invention is to provide coated rice seeds that are less susceptible to deliquescence and suppress seed floating and a decrease in germination rate.

As a result of the present inventor's intensive research to find such coated rice seeds, it was found that when rice seeds coated with zinc oxide, a specific synthetic resin, and a surfactant are sown in the paddy field, deliquescence is reduced, and a sufficient seedling rate can be secured in direct sowing of paddy rice. I found out what was there.

The present invention is as follows.

[1] Coated rice seeds having a coating layer, wherein the coating layer contains zinc oxide, a surfactant, and at least one selected from the following group (A);

Group (A): A group consisting of acrylic resin, vinyl acetate resin, urethane resin, and butadiene copolymer.

[2] Coated rice seeds having a coating layer, wherein the coating layer contains zinc oxide and at least one member selected from the following group (A), and the surfactant is retained at least on the surface of the coated rice seeds. satellite;

Group (A): A group consisting of acrylic resin, vinyl acetate resin, urethane resin, and butadiene copolymer.

[3] The coated rice seed according to [1] or [2], wherein the coating layer contains at least one species selected from the following group (B);

Group (B): A group consisting of titanium oxide, magnesium oxide, clay, zeolite, barium sulfate, and calcium carbonate.

[4] The coated coating according to [3], wherein the coating layer has a first layer containing at least one member selected from group (B), and a second layer containing zinc oxide coated on the outside of the first layer. Rice seeds.

[5] The coated rice seed according to any one of [1] to [3], wherein the coating layer further contains iron oxide.

[6] The coated rice seed according to [5], wherein the coating layer has a first layer containing iron oxide, and a second layer containing zinc oxide coated on the outside of the first layer.

[7] A powder composition containing zinc oxide and at least one member selected from the following group (B), the powder composition having an average particle diameter in the range of 0.01 to 150 μm;

Group (B): A group consisting of titanium oxide, magnesium oxide, clay, zeolite, barium sulfate, and calcium carbonate.

[8] A powder composition containing zinc oxide, at least one member selected from the following group (B), and at least one member selected from the following group (C);

Group (B): A group consisting of titanium oxide, magnesium oxide, clay, zeolite, barium sulfate, and calcium carbonate,

Group (C): A group consisting of acrylic resin and vinyl acetate resin.

[9] A powder composition containing zinc oxide and iron oxide, wherein the weight ratio of zinc oxide to iron oxide is in the range of 1:1000 to 1:1, and the average particle diameter is in the range of 0.01 to 150 ㎛.

[10] A powder composition containing zinc oxide, iron oxide, and an acrylic resin.

[11] The powder composition according to any one of [7] to [10], wherein the apparent relative density is in the range of 0.30 to 2.50 g/mL.

[12] The powder composition according to any one of [7] to [10], wherein the apparent relative density is in the range of 0.30 to 2.0 g/mL.

[13] The powder composition according to any one of [7] to [12], wherein the average particle size of the zinc oxide is in the range of 0.01 to 100 μm.

[14] A kit for producing coated rice seeds containing at least zinc oxide, a surfactant, and at least one member selected from the following group (A);

Group (A): A group consisting of acrylic resin, vinyl acetate resin, urethane resin, and butadiene copolymer.

[15] The kit according to [14], further comprising iron oxide.

[16] The kit according to [14] or [15], which has at least one member selected from the following group (B);

Group (B): A group consisting of titanium oxide, magnesium oxide, clay, zeolite, barium sulfate, and calcium carbonate.

[17] Method for producing coated rice seeds, comprising the following steps:

(1) Adding zinc oxide and at least one aqueous dispersion selected from the group (A) below while moving and rolling the rice seeds to form a coating layer containing zinc oxide and at least one member selected from the group (A) below ,

(2) adding a surfactant while moving and rolling the seed obtained in step (1) to retain the surfactant on the outside of the layer formed by step (1), and

(3) drying the seeds obtained in step (2);

Group (A): A group consisting of acrylic resin, vinyl acetate resin, urethane resin, and butadiene copolymer.

[18] Method for producing coated rice seeds, comprising the following steps:

(1) While moving and rolling the rice seeds, add at least one type selected from the group (B) below, zinc oxide, and an aqueous dispersion of at least one type selected from the group (A) below, and add at least one type selected from the group (A) below. Forming a coating layer containing one type, at least one type selected from the following group (B), and zinc oxide,

(2) adding a surfactant while moving and rolling the seed obtained in step (1) to retain the surfactant on the outside of the layer formed by step (1), and

(3) drying the seeds obtained in step (2);

Group (A): a group consisting of acrylic resin, vinyl acetate resin, urethane resin, and butadiene copolymer, and

Group (B): A group consisting of titanium oxide, magnesium oxide, clay, zeolite, barium sulfate, and calcium carbonate.

[19] Method for producing coated rice seeds, comprising the following steps:

(1) (I) While moving and rolling the rice seeds, add at least one aqueous dispersion selected from the following group (B) and at least one type selected from the following group (A) to at least one selected from the following group (A) forming a coating layer containing at least one species selected from the species and group (B) below, and (II) moving and rolling the seed obtained in step (I) zinc oxide and at least one species selected from group (A) below Adding an aqueous dispersion to form a coating layer containing zinc oxide and at least one member selected from the group (A) below on the outside of the layer formed in step (I),

(2) adding a surfactant while moving and rolling the seed obtained in step (1) to retain the surfactant on the outside of the layer formed by step (1), and

(3) drying the seeds obtained in step (2);

Group (A): A group consisting of acrylic resin, vinyl acetate resin, urethane resin, and butadiene copolymer,

Group (B): A group consisting of titanium oxide, magnesium oxide, clay, zeolite, barium sulfate, and calcium carbonate.

[20] Method for producing coated rice seeds, comprising the following steps:

(1) While moving and rolling the rice seeds, add zinc oxide, iron oxide, and at least one aqueous dispersion selected from the group (A) below to add at least one type selected from the group (A) below, zinc oxide, and iron oxide. forming a coating layer containing,

(2) adding a surfactant while moving and rolling the seed obtained in step (1) to retain the surfactant on the outside of the layer formed by step (1), and

(3) drying the seeds obtained in step (2);

Group (A): A group consisting of acrylic resin, vinyl acetate resin, urethane resin, and butadiene copolymer.

[21] Method for producing coated rice seeds, comprising the following steps:

(1) (i) Add iron oxide and at least one aqueous dispersion selected from the group (A) below while moving and rolling the rice seeds to form a coating layer containing at least one member selected from the group (A) below and iron oxide. forming, and (ii) adding zinc oxide and at least one aqueous dispersion selected from the group (A) below while moving and rolling the seeds obtained in step (i) to the outside of the layer formed by step (i). forming a coating layer containing at least one member selected from group (A) and zinc oxide,

(2) adding a surfactant while moving and rolling the seed obtained in step (1) to retain the surfactant on the outside of the layer formed by step (1), and

(3) drying the seeds obtained in step (2);

Group (A): A group consisting of acrylic resin, vinyl acetate resin, urethane resin, and butadiene copolymer.

[22] Coated rice seeds produced by the method for producing coated rice seeds according to any one of [17] to [21].

The coated rice seeds of the present invention are less susceptible to deliquescence, suppress seed floating and a decrease in germination rate, and can secure a sufficient seedling rate in direct sowing of paddy rice.

[Figure 1] An explanatory diagram to explain the simple seed coating machine used for coating rice seeds in the example.

METHOD FOR CARRYING OUT THE INVENTION

The coated rice seed of the present invention (hereinafter referred to as “this rice seed”) has a coating layer, wherein the coating layer contains zinc oxide, a surfactant, and at least one member selected from the group (A) (hereinafter referred to as “this synthetic rice seed”). (written as "resin"), or the coating layer contains zinc oxide and the present synthetic resin, and the surfactant is retained at least on the surface of the coating layer.

Rice seeds used in the present invention are intended to mean seeds of commonly cultivated rice varieties.

Examples of varieties include species such as Japonica subspecies and Indica subspecies, and varieties with high lodging tolerance and high germination rate are preferred.

Zinc oxide used in the present invention is intended to mean a compound represented by ZnO, which may be a commercially available zinc oxide. Examples of commercially available zinc oxide include zinc oxide 3N5 (manufactured by KANTO CHEMICAL CO., INC.) and zinc oxide first grade (manufactured by NIPPON CHEMICAL INDUSTRIAL CO., LTD.). The zinc oxide used in the present invention preferably has a purity of at least 99% (% by weight relative to the zinc oxide). The purity of zinc oxide is determined by the test procedure specified in K1410 of the Japanese Industrial Standards (JIS). Additionally, powdered zinc oxide is usually used, and the average particle diameter of zinc oxide is in the range of 0.01 to 100 μm, preferably 0.1 to 50 μm, and more preferably 0.1 to 10 μm. The average particle size of zinc oxide used in the present invention refers to the particle size measured with a laser diffraction/scattering particle size distribution analyzer, and is defined as the particle size that is 50% of the cumulative frequency in the volume-based frequency distribution. The average particle size of zinc oxide can be obtained by dispersing zinc oxide particles in water and measuring them using Mastersizer 2000 (manufactured by Malvern Instruments Ltd) as a laser diffraction/scattering type particle size distribution analyzer, the so-called wet measurement method.

The content of zinc oxide in this rice seed is usually in the range of 0.005 to 80% by weight, preferably 0.05 to 70% by weight, and more preferably 0.1 to 50% by weight. Considering the impact on plant growth and the environment, a range of 0.1 to 15% by weight is preferable.

The surfactant used in the present invention is preferably at least one selected from the group consisting of nonionic surfactants and anionic surfactants, more preferably polyoxyethylene alkyl ether, polyoxyethylene aryl phenyl ether, and sulfonate. It is at least one species selected from the group consisting of. In addition, the polyoxyethylene aryl phenyl ether is preferably polyoxyethylene polystyryl phenyl ether, and the sulfonate is preferably naphthalenesulfonate and its formaldehyde condensate, phenolsulfonate and its formaldehyde condensate, and lignosulfonate. It is at least one type selected from the group consisting of sulfonates.

Polyoxyethylene alkyl ethers include polyoxyethylene stearyl ether and polyoxyethylene tridodecyl ether. Polyoxyethylene polystyryl phenyl ether includes polyoxyethylene tristyrylphenyl ether. Naphthalene sulfonate and formaldehyde condensate thereof include formaldehyde condensate of sodium naphthalene sulfonate, phenol sulfonate and formaldehyde condensate thereof include formaldehyde condensate of sodium phenol sulfonate, and lignosulfonate. includes sodium lignosulfonate. Surfactants are commercially available, for example, commercially available polyoxyethylene tristyrylphenyl ether includes SORPOL5080 (manufactured by TOHO Chemical Industry Co., Ltd.), and formaldehyde condensation of commercially available sodium naphthalenesulfonate. Water contains NEWKALGEN PS-P (TAKEMOTO OIL & FAT Co., Ltd.).

In the present invention, a powdered surfactant is preferably used, and a surfactant having a particle size distribution in which the content of particles having a size of 100 ㎛ or more is 2% or less is preferably used. As used in the present invention, “particle size distribution of surfactant” refers to a particle size distribution measured using a sieve method, and as used in the present invention, “having a particle size distribution in which the content of particles having a size of 100 ㎛ or more is 2% or less. " shows that the weight ratio of the remaining amount on the 100 ㎛ aperture sieve to the total amount is 2% or less. The particle size distribution of the surfactant was determined by placing 10 g of the surfactant on a 100 ㎛ aperture sieve (a test sieve defined by Japanese Industrial Standards (JIS) Z8801-1 with an edge of 200 mm in diameter and 45 mm in depth) using a rotab method. After sieving the surfactant for 10 minutes using a sieving device such as a ro-tap shaker, the weight of the surfactant remaining on the sieve is measured, and the particle size distribution can be calculated according to the following equation.

Remaining amount on the sieve (%) = Weight of surfactant remaining on the sieve (g)/Weight of surfactant initially placed on the sieve (g) × 100

The surfactant content of this rice seed is usually in the range of 0.002 to 6% by weight, preferably 0.01 to 5% by weight, and more preferably 0.1 to 2% by weight.

This synthetic resin is described below.

As used in the present invention, acrylic resin refers to a polymer compound produced by reacting at least one of acrylic acid alkyl ester and methacrylic acid alkyl ester as a monomer. Acrylic acid alkyl esters include methyl acrylate, ethyl acrylate, butyl acrylate, and 2-ethylhexyl acrylate, and methacrylic acid alkyl esters include methyl methacrylate.

Vinyl acetate resin refers to a polymer compound produced by reacting at least vinyl acetate as a monomer.

Urethane resin refers to a polymer compound produced by reacting polyisocyanate and polyol, polyisocyanate includes aliphatic isocyanates such as hexamethylene diisocyanate (HDI) and isophorone diisocyanate (IPDI), and polyol includes polyethylene glycol and poly Includes polyether polyols such as propylene glycol, polyester polyols such as polyethylene adipate glycol and polybutylene adipate glycol, and polycarbonate polyols such as polybutylene carbonate diol and polyhexamethylene carbonate diol. do.

Butadiene copolymer refers to a copolymer composed of 1,3-butadiene (hereinafter referred to as “butadiene”) and at least one type of monomer copolymerizable with butadiene.

The acrylic resin is preferably a copolymer composed of alkyl acrylate or alkyl methacrylate and at least one member selected from the group consisting of aromatic vinyl monomers, olefin monomers, and silicone macromers. Aromatic vinyl monomers include styrene, and olefin monomers include ethylene. Specific acrylic resins include copolymers composed of alkyl acrylate and alkyl methacrylate (Mowinyl-Powder LDM7000P manufactured by Nippon Synthetic Chemical Industry Co., Ltd., etc.), copolymers composed of alkyl acrylate and styrene (Nippon Synthetic Chemical) Industry Co., Ltd. Mowinyl6485, etc.), copolymers composed of acrylic acid alkyl esters and silicone macromers (Nippon Synthetic Chemical Industry Co., Ltd., Mowinyl7110, etc.), and copolymers composed of ethylene and methacrylic acid alkyl esters. Including composites (NUCREL N1108C, etc. manufactured by DUPONT-MITSUI POLYCHEMICALS CO., LTD).

The vinyl acetate resin is preferably a copolymer composed of vinyl acetate and at least one member selected from the group consisting of acrylic acid alkyl esters, methacrylic acid alkyl esters, vinyl versatate, olefin monomers, halogenated olefin monomers, and unsaturated dicarboxylic acids. . Acrylic acid alkyl esters include methyl acrylate, ethyl acrylate, butyl acrylate, and 2-ethylhexyl acrylate, and methacrylic acid alkyl esters include methyl methacrylate. Olefin monomers include ethylene, halogenated olefin monomers include vinyl chloride and vinylidene chloride, and unsaturated dicarboxylic acids include maleic acid. Specific vinyl acetate resins include a copolymer composed of vinyl acetate, vinyl versatate, and alkyl acrylic ester (Mowinyl-Powder LDM2072P, etc. manufactured by Nippon Synthetic Chemical Industry Co., Ltd.), a copolymer composed of vinyl acetate and ethylene (Nippon Mowinyl 180E, etc., manufactured by Synthetic Chemical Industry Co., Ltd.) and copolymers composed of ethylene, vinyl acetate, and vinyl chloride (SUMIKAFLEX808HQ, etc., manufactured by Sumika Chemtex Company, Limited).

The urethane resin is preferably a urethane resin obtained by polymerizing at least one species selected from the group consisting of aliphatic isocyanate, polyester polyol, and polycarbonate polyol. Specific urethane resins include urethane resins obtained by polymerizing aliphatic isocyanate and polyester polyol (SUPERFLEX500M, etc., manufactured by DKS Co. Ltd.), and urethane resins obtained by polymerizing aliphatic isocyanate and polycarbonate polyol (SUPERFLEX460, manufactured by DKS Co. Ltd.) etc.) includes.

The butadiene copolymer is preferably a copolymer composed of butadiene and at least one member selected from the group consisting of methacrylic acid alkyl esters and aromatic vinyl monomers.

Methacrylic acid alkyl esters include methyl methacrylate, and aromatic vinyl monomers include styrene. Specific butadiene copolymers include a copolymer composed of butadiene and styrene (hereinafter referred to as “butadiene-styrene copolymer”), a copolymer composed of butadiene, styrene, and methyl methacrylate (hereinafter referred to as “butadiene-styrene-methyl”) (written as “methacrylate copolymer”), carboxylated butadiene-styrene copolymer (NALSTAR SR103, etc. manufactured by NIPPON A&L INC.), and carboxylated butadiene-styrene-methyl methacrylate copolymer (manufactured by NIPPON A&L INC.). Includes NALSTAR SR140, etc.)

The glass transition point (Tg) of this synthetic resin is usually 50°C or lower, preferably in the range of -50°C to 50°C. Additionally, the present synthetic resin having a minimum film forming temperature (MFT) of 10° C. or lower is preferably used.

The synthetic resin used in the present invention is in latex or powder form. Latex refers to an aqueous dispersion of fine particles of synthetic resin, and the average particle diameter of the fine particles is usually 1 μm or less. The average particle size of synthetic resin fine particles in latex used in the present invention refers to the particle size measured by a laser diffraction/scattering type particle size distribution analyzer, and is defined as the particle size that is 50% of the cumulative frequency in the volume-based frequency distribution. . The average particle size of fine particles of synthetic resin is measured by dispersing synthetic resin particles in water and subsequently measuring them using Mastersizer 2000 (manufactured by Malvern Instruments Ltd) as a laser diffraction/scattering type particle size distribution analyzer, the so-called wet measurement method. You can get it.

The content of synthetic resin in latex is usually about 30 to 70% (% by weight relative to latex). This synthetic resin commercially available in latex form is manufactured by Nippon Synthetic Chemical Industry Co., Ltd. Made by Mowinyl6485 (copolymer composed of acrylic acid alkyl ester and styrene), NIPPON A&L INC. NALSTAR SR140 (carboxylated butadiene-styrene-methyl methacrylate copolymer), SUMIKAFLEX808HQ (copolymer composed of ethylene, vinyl acetate, and vinyl chloride) manufactured by Sumika Chemtex Company, Limited, and DKS Co. Ltd. Includes SUPERFLEX500M (urethane resin made by polymerizing aliphatic isocyanate and polyester polyol).

Powdered synthetic resins are generally produced by spraying and drying latex. The particle size of the powdery synthetic resin is usually 1000 μm or less, preferably 500 μm or less. The particle size of the powdery synthetic resin used in the present invention refers to the particle size measured using a sieving method, and is a sieve through which the entire amount of the powdery synthetic resin can pass (Japanese Industrial Standards (JIS) with an edge having a diameter of 200 mm and a depth of 45 mm). ) It is expressed as the minimum value of the aperture of the test sieve specified by Z8801-1.

In addition, this synthetic resin commercially available in powder form is manufactured by Nippon Synthetic Chemical Industry Co., Ltd. Made by Mowinyl-Powder DM2072P (a copolymer composed of vinyl acetate, vinyl versatate, and alkyl acrylic ester), and Nippon Synthetic Chemical Industry Co., Ltd. Includes Mowinyl-Powder LDM7000P (copolymer composed of alkyl acrylic ester and alkyl methacrylic acid).

The content of this synthetic resin in rice seeds is usually in the range of 0.01 to 5% by weight, preferably 0.05 to 4% by weight, and more preferably 0.1 to 2% by weight.

The coating layer may contain iron oxide. Iron oxide used in the present invention refers to a material mainly composed of iron oxide represented by Fe ₂ O ₃ . Iron oxide containing more than 70% (% by weight relative to iron oxide) of α-Fe ₂ O ₃ , called hematite, is preferably used. The content of Fe ₂ O ₃ used in the present invention is determined by XRD (X-ray diffraction method). Additionally, powdered iron oxide is usually used, and the average particle size of the iron oxide is in the range of 0.1 to 150 μm, preferably 0.1 to 100 μm, and more preferably 1 to 80 μm. The average particle size of iron oxide used in the present invention refers to the particle size measured by a laser diffraction/scattering type particle size distribution analyzer, and is defined as the particle size that is 50% of the cumulative frequency in the volume-based frequency distribution. The average particle size of iron oxide can be obtained by dispersing iron oxide particles in water and subsequently measuring them using a laser diffraction/scattering particle size distribution analyzer, Mastersizer 2000 (manufactured by Malvern Instruments Ltd), the so-called wet measurement method. there is.

When the coating layer contains iron oxide, the content of iron oxide in the rice seeds is usually in the range of 0.5 to 80% by weight, preferably 1 to 70% by weight, more preferably 1 to 50% by weight.

The coating layer may contain at least one type selected from group (B) (hereinafter referred to as “this inorganic compound”). Clays in this inorganic compound include pyrophyllite and kaolin. In addition, because of good adhesion to rice seeds, the present inorganic compound is preferably at least one selected from the group consisting of clay, barium sulfate, and calcium carbonate, and calcium carbonate is particularly preferable.

In the present invention, the present inorganic compound in powder form is preferably used, and its average particle diameter is usually 200 μm or less, preferably 150 μm or less. The average particle size of the inorganic compound used in the present invention refers to the particle size measured by a laser diffraction/scattering type particle size distribution analyzer, and is defined as the particle size that is 50% of the cumulative frequency in the volume-based frequency distribution. The average particle size of the present inorganic compound is determined by dispersing the particles of the present inorganic compound in water and subsequently measuring them using Mastersizer 2000 (manufactured by Malvern Instruments Ltd) as a laser diffraction/scattering type particle size distribution analyzer, the so-called wet measurement method. You can get it.

When two or more types of inorganic compounds having different average particle diameters selected from group (B) are used as the present inorganic compound, the coating layer becomes a more dense coating layer. Two or more types of inorganic compounds having different average particle diameters may be the same or different. Preferably, calcium carbonate with an average particle size of 1 to 20 ㎛ and calcium carbonate with an average particle size of 25 to 70 ㎛ are used in combination.

When the coating layer contains the present inorganic compound, its content in the present rice seed is usually in the range of 0.5 to 80% by weight, preferably 1 to 70% by weight, more preferably 1 to 50% by weight.

The coating layer may contain pesticide active ingredients. Examples of pesticide active ingredients include insecticidal active ingredients, fungicidal active ingredients, herbicidal active ingredients, and plant growth regulator active ingredients.

Examples of insecticidal active ingredients include clothianidin, imidacloprid, and thiamethoxam.

Examples of fungicidal active ingredients include isotianil and furametpyr.

Examples of herbicidal active ingredients include imazosulfuron and bromobutide.

Examples of plant growth regulating active ingredients include uniconazole P.

In the present invention, a powdered pesticide active ingredient is preferably used, and can optionally be mixed with the present inorganic compound and pulverized using a grinder such as a dry grinder to be used as a powder pesticide. The average particle size of powdered pesticide is usually 200 ㎛ or less, preferably 150 ㎛ or less. The average particle size of the powdered pesticide used in the present invention refers to the particle size measured by a laser diffraction/scattering type particle size distribution analyzer, and is defined as the particle size that is 50% of the cumulative frequency in the volume-based frequency distribution. When the powdered pesticide is mixed with the present inorganic compound, the average particle size of the powdered pesticide means the average particle size of the mixture. The average particle size of powdered pesticide can be obtained by the so-called wet measurement method, which is a method of dispersing particles of powdered pesticide in water and then measuring them using Mastersizer 2000 (manufactured by Malvern Instruments Ltd) as a laser diffraction/scattering type particle size distribution analyzer. there is.

When the coating layer contains a pesticide active ingredient, its content in the present rice seed is usually in the range of 0.001 to 3% by weight, preferably 0.005 to 2% by weight, more preferably 0.01 to 2% by weight.

The coating layer may contain a colorant. Examples of colorants include pigments, colorants, and dyes, with pigments being particularly preferred. The pigment is preferably a red or blue pigment such as ultramarine blue Nubix G-58 (blue pigment, manufactured by nubiola Inc.) and TODA COLOR-300R (red pigment, manufactured by TODA KOGYO CORP.).

The ingredients used in the production of this rice seed can be used separately, or all or at least two of the ingredients can be mixed. The kit of the present invention (hereinafter referred to as “the kit”) has zinc oxide, a surfactant, and the present synthetic resin, which may be contained in one container or may be contained in two or more containers. That is, this kit may include one or more container(s). If the kit includes two or more containers, each container may contain different ingredients. Additionally, this kit may contain other components (hereinafter referred to as “component α”) such as iron oxide, this inorganic compound, and pesticide active ingredient.

The present rice seed forms a coating layer (hereinafter referred to as “main coating layer 1”) containing zinc oxide, a surfactant, and the present synthetic resin, and optionally containing iron oxide or the present inorganic compound, on the rice seed, or Or, after forming a coating layer (hereinafter referred to as “main coating layer 2”) containing zinc oxide and the present synthetic resin, and optionally containing iron oxide or the present inorganic compound, on rice seeds, a surfactant is applied to the surface of the present coating layer 2. It can be manufactured by retaining .

This coating layer 1 is formed by carrying out the step of adding zinc oxide, surfactant, and this synthetic resin, and optionally iron oxide or this inorganic compound, while moving and rolling the rice seeds, and causing them to adhere to the rice seeds. This coating layer 2 is formed by carrying out the step of adding zinc oxide and the present synthetic resin, and optionally iron oxide or the present inorganic compound, while moving and rolling the rice seeds, thereby allowing them to adhere to the rice seeds. As a device for moving and rolling rice seeds, a device used for conventional iron coating, such as a coating machine, can be used. Zinc oxide, surfactant, the present synthetic resin, and iron oxide or the present inorganic compound optionally used may be used separately, or all or at least two of the components may be used in mixture. When all of the components are mixed and used, a powder composition containing zinc oxide, a surfactant, the present synthetic resin, and optionally iron oxide or the present inorganic compound is used. In this case, the present synthetic resin is preferably in powder form. When using a mixture of at least two types of components, a powder composition containing zinc oxide and a surfactant and optionally iron oxide or the present inorganic compound and the present synthetic resin is used, or a powder composition containing zinc oxide and the present synthetic resin and optionally iron is used. A powder composition containing the oxide or this inorganic compound and a surfactant is used. Additionally, when using component α, component α can be used alone, or can be used in addition to zinc oxide and optionally iron oxide or the present inorganic compound.

When the present synthetic resin is in the form of latex, zinc oxide, surfactant, and the present synthetic resin are used separately to form the present coating layer 2, and then the method of retaining the surfactant on its surface is described below.

While moving and rolling the rice seeds, zinc oxide and this synthetic resin are added separately to form the main coating layer 2 on the rice seeds. This synthetic resin can attach zinc oxide to rice seeds by acting as a binder. A preferred embodiment of the present rice seed is one in which the surfactant is retained at least on its surface, and after forming the main coating layer 2 on the rice seed, the surfactant is added while maintaining the state of moving and rolling the rice seed to coat the outer surface of the main coating layer 2. By attaching a surfactant to the surface, the surfactant can be retained on the surface.

When using the present inorganic compound, zinc oxide and the present inorganic compound may be mixed in the above method or may be added separately. When added separately, the present inorganic compound is added first and the zinc oxide is added later, thereby producing the present rice having a first layer containing the present inorganic compound and a second layer containing zinc oxide coated on the outside of the first layer. Seeds can be manufactured. Specifically, while moving and rolling the rice seeds, the present inorganic compound and this synthetic resin are added separately to form a first layer containing the present inorganic compound and the present synthetic resin, and while maintaining the state of moving and rolling the rice seeds, zinc oxide and The present synthetic resins are added separately to form a second layer containing zinc oxide and the present synthetic resin on the outside of the first layer.

The powder composition containing zinc oxide and this inorganic compound (hereinafter sometimes referred to as “this composition (1)”) is suitable as a powder composition for coating rice seeds. The average particle diameter of the composition (1) is in the range of 0.01 to 150 ㎛, preferably 1 to 150 ㎛, more preferably 1 to 60 ㎛.

The average particle size of the composition (1) used in the present invention refers to the particle size measured by a laser diffraction/scattering type particle size distribution analyzer, and is defined as the particle size that is 50% of the cumulative frequency in the volume-based frequency distribution. The average particle size of the composition (1) is measured by dispersing the particles of the composition (1) in water and then using a laser diffraction/scattering particle size distribution analyzer, Mastersizer 2000 (manufactured by Malvern Instruments Ltd), the so-called wet method. It can be obtained by measuring method.

The apparent relative density of the present composition (1) is, for example, 0.30 to 2.50 g/mL and 0.30 to 2.0 g/mL, preferably 0.50 to 2.0 g/mL, more preferably 0.60 to 1.7 g/mL. It's in range. The apparent relative density of the composition is preferably high because scattering is prevented in the production of coated rice seeds. The apparent relative density of the composition (1) used in the present invention is obtained by a method according to the test procedure specified in the certified pesticide analysis method (physical property assay method, Ministry of Agriculture, Food and Rural Affairs Notification No. 71, February 3, 1965). The method involves placing an 8-mesh standard sieve (a test sieve specified in Z8801-11410 of the Japanese Industrial Standards (JIS) with a rim of 200 mm in diameter and a depth of 45 mm) on a 100 mL metal cylindrical container with an inner diameter of 50 mm. It includes the step of placing a sample in a sieve and gently dropping it with a brush to fill the container. Afterwards, the excess of the sample is immediately rubbed off using a slide glass, the sample is then weighed to determine the weight of the contents, and the apparent relative density is calculated according to the following formula. The distance between the sieve and the upper edge of the container is set to 20 cm.

Apparent relative density (g/mL) = weight of contents / 100

The weight ratio of zinc oxide to this inorganic compound in the composition (1) is usually in the range of 1:1000 to 1000:1, preferably 1:1000 to 100:1, more preferably 1:200 to 10:1. there is. Considering the impact on plant growth and the environment, a range of 1:200 to 1:3 is preferable.

When the present synthetic resin is in the form of latex, after forming the present coating layer 2 using a powder composition containing zinc oxide and iron oxide, a surfactant, and the present synthetic resin, the method of retaining the surfactant on its surface is as follows. It is explained in

While moving and rolling the rice seeds, the powder composition containing zinc oxide, iron oxide, and this synthetic resin is added separately to form the main coating layer 2 on the rice seeds. This synthetic resin can attach zinc oxide and iron oxide to rice seeds by acting as a binder. A preferred embodiment of the present rice seed is one in which the surfactant is retained at least on its surface, and after forming the main coating layer 2 on the rice seed, the surfactant is added while maintaining the state of moving and rolling the rice seed to coat the outer surface of the main coating layer 2. By attaching a surfactant to the surface, the surfactant can be retained on the surface.

When forming the main coating layer using iron oxide and zinc oxide separately, iron oxide is added first, and zinc oxide is added later to form a first layer containing iron oxide and zinc oxide coated on the outside of the first layer. The present rice seed having a second layer containing Specifically, while moving and rolling the rice seeds, iron oxide and this synthetic resin are added separately to form a first layer containing iron oxide and this synthetic resin, and while maintaining the state of moving and rolling the rice seeds, zinc oxide and this synthetic resin are added separately. The resins are added separately to form a second layer containing zinc oxide and the present synthetic resin on the outside of the first layer.

A powder composition containing zinc oxide and iron oxide (hereinafter sometimes referred to as “this composition (2)”) is suitable as a powder composition for coating rice seeds. The weight ratio of zinc oxide to iron oxide in the composition (2) is in the range of 1:1000 to 1:1, preferably 1:200 to 1:1, more preferably 1:200 to 1:2. Considering the impact on plant growth and the environment, a range of 1:200 to 1:3 is preferable. The average particle diameter of the composition (2) is in the range of 0.01 to 150 ㎛, preferably 1 to 100 ㎛, more preferably 1 to 50 ㎛. The average particle size of the composition (2) used in the present invention refers to the particle size measured by a laser diffraction/scattering type particle size distribution analyzer, and is defined as the particle size that is 50% of the cumulative frequency in the volume-based frequency distribution. The average particle size of the present composition (2) is measured by dispersing the particles of the present composition (2) in water and then using a laser diffraction/scattering type particle size distribution analyzer, Mastersizer 2000 (manufactured by Malvern Instruments Ltd), the so-called wet method. It can be obtained by measuring method.

The apparent relative density of the composition (2) is, for example, 0.30 to 2.50 g/mL, 0.30 to 2.0 g/mL, preferably 0.50 to 2.20 g/mL, more preferably 1.00 to 2.20 g/mL. It's in range.

Several examples of the present composition (1) are described below. In the examples below, % represents weight % relative to the present composition (1).

A powder composition containing at least one member selected from the group consisting of zinc oxide and clay, barium sulfate and calcium carbonate, the powder composition having an average particle diameter of 0.01 to 150 ㎛ and an apparent relative density of 0.30 to 2.0 g/mL. ;

A powder composition containing at least one member selected from the group consisting of zinc oxide and clay, barium sulfate and calcium carbonate, with an average particle diameter of 1 to 150 ㎛ and an apparent relative density of 0.50 to 2.0 g/mL. ;

A powder composition containing at least one member selected from the group consisting of zinc oxide and clay, barium sulfate and calcium carbonate, the powder composition having an average particle diameter of 1 to 60 ㎛ and an apparent relative density of 0.60 to 1.7 g/mL. ;

A powder composition containing at least one member selected from the group consisting of zinc oxide and pyrophyllite, barium sulfate and calcium carbonate, with an average particle diameter of 0.01 to 150 ㎛ and an apparent relative density of 0.30 to 2.0 g/mL. Phosphorus phase composition;

A powder composition containing at least one member selected from the group consisting of zinc oxide and pyrophyllite, barium sulfate, and calcium carbonate, with an average particle diameter of 1 to 150 ㎛ and an apparent relative density of 0.50 to 2.0 g/mL. Phosphorus phase composition;

A powder composition containing at least one member selected from the group consisting of zinc oxide and pyrophyllite, barium sulfate and calcium carbonate, with an average particle diameter of 1 to 60 ㎛ and an apparent relative density of 0.60 to 1.7 g/mL. Phosphorus phase composition;

A powder composition containing zinc oxide and calcium carbonate, wherein the powder composition has an average particle diameter of 1 to 60 ㎛ and an apparent relative density of 0.60 to 1.7 g/mL;

A powder composition containing 0.5 to 30% of zinc oxide and 70 to 99.5% of calcium carbonate, with an average particle diameter of 5 to 50 μm and an apparent relative density of 0.80 to 1.5 g/mL;

A powder composition containing 1 to 25% of zinc oxide and 75 to 99% of calcium carbonate, with an average particle diameter of 15 to 45 μm and an apparent relative density of 1.0 to 1.3 g/mL;

A powder composition consisting of 25% zinc oxide and 75% calcium carbonate, with an average particle diameter of 21.5 μm and an apparent relative density of 1.02 g/mL;

A powder composition consisting of 10% zinc oxide and 90% calcium carbonate, with an average particle diameter of 30.0 μm and an apparent relative density of 1.20 g/mL;

A powder composition consisting of 1% zinc oxide and 99% calcium carbonate, with an average particle diameter of 41.4 μm and an apparent relative density of 1.3 g/mL;

A powder composition containing zinc oxide and clay, with an average particle diameter of 1 to 60 ㎛ and an apparent relative density of 0.60 to 1.7 g/mL;

A powder composition containing zinc oxide and pyrophyllite, the powder composition having an average particle diameter of 1 to 60 ㎛ and an apparent relative density of 0.60 to 1.7 g/mL;

A powder composition containing 40 to 95% of zinc oxide and 5 to 60% of pyrophyllite, with an average particle diameter of 1 to 15 μm and an apparent relative density of 0.60 to 1.0 g/mL;

A powder composition consisting of 90% zinc oxide and 10% pyrophyllite, with an average particle diameter of 10.3 μm and an apparent relative density of 0.94 g/mL;

A powder composition consisting of 50% zinc oxide and 50% pyrophyllite, with an average particle diameter of 3.3 μm and an apparent relative density of 0.66 g/mL;

A powder composition containing zinc oxide and barium sulfate, with an average particle diameter of 1 to 60 μm and an apparent relative density of 0.60 to 1.7 g/mL;

A powder composition containing 10 to 60% of zinc oxide and 40 to 90% of barium sulfate, with an average particle diameter of 1 to 20 μm and an apparent relative density of 0.8 to 1.2 g/mL;

A powder composition consisting of 20% zinc oxide and 80% barium sulfate, with an average particle diameter of 10.5 μm and an apparent relative density of 1.07 g/mL; and

A powder composition consisting of 50% zinc oxide and 50% barium sulfate, with an average particle diameter of 1.6 μm and an apparent relative density of 0.87 g/mL.

Several examples of the present composition (2) are described below. In the examples below, % represents weight % relative to the present composition (2).

A powder composition containing zinc oxide and iron oxide, with an average particle diameter of 0.01 to 150 ㎛, an apparent relative density of 0.30 to 2.50 g/mL, and a weight ratio of zinc oxide to iron oxide of 1:1000 to 1:1. composition;

A powder composition containing zinc oxide and iron oxide, with an average particle diameter of 1 to 100 ㎛, an apparent relative density of 0.50 to 2.20 g/mL, and a weight ratio of zinc oxide to iron oxide of 1:200 to 1:1. composition;

A powder composition containing zinc oxide and iron oxide, with an average particle diameter of 1 to 50 ㎛, an apparent relative density of 1.00 to 2.20 g/mL, and a weight ratio of zinc oxide to iron oxide of 1:200 to 1:1. composition;

A powder composition containing 1 to 50% zinc oxide and 50 to 99% iron oxide, with an average particle diameter of 1 to 30 μm, an apparent relative density of 1.20 to 2.20 g/mL, and a weight ratio of zinc oxide to iron oxide. A powder composition with an A of 1:100 to 1:1;

A powder composition containing 1 to 30% zinc oxide and 70 to 99% iron oxide, with an average particle diameter of 1 to 30 μm, an apparent relative density of 1.20 to 2.20 g/mL, and a weight ratio of zinc oxide to iron oxide. A powder composition with an A of 1:100 to 1:2;

A powder composition consisting of 25% zinc oxide and 75% iron oxide, with an average particle diameter of 2.7 μm, an apparent relative density of 1.38 g/mL, and a weight ratio of zinc oxide to iron oxide of 1:3; and

A powder composition consisting of 5% zinc oxide and 95% iron oxide, with an average particle diameter of 28.6 μm, an apparent relative density of 2.07 g/L, and a weight ratio of zinc oxide to iron oxide of 1:19.

When the present synthetic resin is in powder form, the present composition (1) may contain the present synthetic resin. Some examples of the present composition (1) containing the present synthetic resin are described below. In the examples below, % represents weight % relative to the present composition (1).

A powder composition containing zinc oxide, calcium carbonate, and at least one member selected from the group consisting of acrylic resin and vinyl acetate resin;

A powder composition containing zinc oxide, calcium carbonate, and acrylic resin;

A powder composition containing zinc oxide, calcium carbonate, and vinyl acetate resin;

A powder composition containing zinc oxide, calcium carbonate, and an acrylic resin, wherein the powder composition has an apparent relative density of 0.60 to 1.7 g/mL;

A powder composition containing zinc oxide, calcium carbonate, and vinyl acetate resin, the powder composition having an apparent relative density of 0.60 to 1.7 g/mL;

A powder composition containing 0.1 to 5% zinc oxide, 90 to 98% calcium carbonate, and 1.9 to 5% acrylic resin, and having an apparent relative density of 1.0 to 1.5 g/mL;

A powder composition consisting of 1.0% zinc oxide, 95.2% calcium carbonate, and 3.8% acrylic resin, with an average particle diameter of 40.1 μm and an apparent relative density of 1.31 g/mL;

A powder composition consisting of 4.8% zinc oxide, 91.4% calcium carbonate, and 3.8% acrylic resin, with an average particle diameter of 35.0 μm and an apparent relative density of 1.18 g/mL; and

In the above examples, the acrylic resin is preferably a copolymer composed of acrylic acid alkyl ester and methacrylic acid alkyl ester, and the vinyl acetate resin is preferably a copolymer composed of vinyl acetate, vinyl versatate, and acrylic acid alkyl ester. am.

When the present synthetic resin is in powder form, the present composition (2) may contain the present synthetic resin. Some examples of the present composition (2) containing the present synthetic resin are described below. In the examples below, % represents weight % relative to the present composition (2).

A powder composition containing zinc oxide, iron oxide, and an acrylic resin;

A powder composition containing zinc oxide, iron oxide, and an acrylic resin, with an average particle diameter of 1 to 50 ㎛, an apparent relative density of 1.0 to 2.20 g/mL, and a weight ratio of zinc oxide to iron oxide of 1:200 to 1. :1 serving powder composition;

A powder composition containing 4 to 30% of zinc oxide, 65 to 94% of iron oxide, and 2 to 5% of acrylic resin, with an average particle diameter of 1 to 30 ㎛ and an apparent relative density of 1.20 to 2.20 g/mL. and a powder composition in which the weight ratio of zinc oxide to iron oxide is 1:100 to 1:2;

A powder composition consisting of 24% zinc oxide, 72.1% iron oxide, and 3.9% acrylic resin, with an average particle diameter of 2.6 μm, an apparent relative density of 1.33 g/mL, and a weight ratio of zinc oxide to iron oxide of 1. :3 serving powder composition; and

A powder composition consisting of 4.8% zinc oxide, 91.4% iron oxide, and 3.8% acrylic resin, with an average particle diameter of 21.3 ㎛, an apparent relative density of 1.93 g/mL, and a weight ratio of zinc oxide to iron oxide of 1. :19 person powder composition.

In the above examples, the acrylic resin is preferably a copolymer composed of acrylic acid alkyl ester and methacrylic acid alkyl ester.

The method for producing this rice seed (hereinafter referred to as “this production method”) will be described. In this production method, rice seeds are usually soaked before use. Soaking can be performed as follows. First, put dried rice seeds in a bag such as a rice seed bag and soak in water. Preferably, in order to produce coated rice seeds with a high germination rate, rice seeds are soaked at 15 to 20° C. for 3 to 4 days. After rice seeds are taken out of the water, they are usually left to stand or dried in a dehydrator to remove excess moisture from their surface.

First, a method for producing coated rice seeds having the main coating layer 2 and the surfactant retained on the surface of the layer (hereinafter referred to as “this production method 1”) will be described. This production method 1 includes the following steps.

(1) forming the main coating layer 2 by adding zinc oxide and an aqueous dispersion of the present synthetic resin while moving and rolling the rice seeds, (2) adding a surfactant while moving and rolling the rice seeds obtained in step (1) to form step (1) ) retaining the surfactant on the outside of the main coating layer 2 formed by , and (3) drying the rice seeds obtained in step (2).

In this production method 1, a step of forming the main coating layer 2 (hereinafter referred to as “step 1”) is first carried out by adding zinc oxide and an aqueous dispersion of the present synthetic resin while moving and rolling the soaked rice seeds. The aqueous dispersion of this synthetic resin can be used by arbitrarily diluting this synthetic resin commercially available in latex form with water. In Step 1, the aqueous dispersion of the present synthetic resin (hereinafter referred to as “present latex”) may be added first and then the zinc oxide may be added, and the order may be reversed. Additionally, this latex and zinc oxide can be added simultaneously. Zinc oxide and bone latex are added while constantly touching the rice seeds in a rolling state. In the present latex, the content of the present synthetic resin is usually in the range of 20 to 65%, preferably 30 to 60%, more preferably 30 to 40% (all of which represent weight percent relative to the latex). Methods for adding the present latex may include dripping and spraying. After adding the latex and zinc oxide, the latex is used as a binder to attach the zinc oxide to the rice seeds while maintaining a rolling state.

The total amount of zinc oxide added in this production method 1 is usually in the range of 5 to 400 parts by weight, preferably 5 to 200 parts by weight, and more preferably 10 to 100 parts by weight, based on 100 parts by weight of dried rice seeds. Considering the influence on plant growth and the environment, the preferred range is 10 to 25 parts by weight. The total amount of the synthetic resin added is usually in the range of 0.025 to 25 parts by weight, preferably 0.05 to 8 parts by weight, and more preferably 0.1 to 4 parts by weight, based on 100 parts by weight of dried rice seeds. The weight ratio of the present synthetic resin to zinc oxide is usually in the range of 1:200 to 1:10, preferably 1:100 to 1:25.

In Step 1, a uniform coating layer can be formed by dividing and adding zinc oxide and the present synthetic resin and repeating Step 1. In this case, the one-time addition amount of zinc oxide is usually about 1 to 1/10, preferably 1/2 to 1/5, of the total addition amount of zinc oxide. Additionally, the amount of the synthetic resin added at one time may vary depending on the state of the coating, but is usually about 1 to 1/10, preferably about 1/2 to 1/5, of the total amount of the synthetic resin added. As used in the present invention, one addition amount of the present synthetic resin refers to the amount of the present synthetic resin required to cause the entire addition amount of zinc oxide to adhere to rice seeds. Zinc oxide and this synthetic resin do not need to be added alternately, but can be added depending on the condition of the coating. Only water can be added as needed. The total amount of water added is usually about 1/2 to 1/100 of the total amount of zinc oxide, preferably about 1/3 to 1/10. The total amount of water added includes the amount of water used to dilute the latex.

In step 1, when zinc oxide adheres to the inner wall of the device, almost the entire amount of the added zinc oxide can be adhered to the rice seeds by scraping off the zinc oxide using a scraper or the like.

After performing Step 1, a step of adding a surfactant while moving and rolling the seed obtained in Step 1 to retain the surfactant on the outside of the layer formed by Step 1 (hereinafter referred to as “Step 2”) is performed. In step 2, after performing step 1, a surfactant can be added while maintaining the rolling state of moving the rice seed to retain the surfactant on the outside of the main coating layer 2.

After performing step 2, a step of drying the seeds obtained in step 2 is performed to obtain the rice seeds. Specifically, after performing step 2, the rice seeds are taken out from the device, placed in a seedling box, spread thinly, and left to dry. Rice seeds are usually dried until the moisture content is less than 20% (% by weight of coated rice seeds). The moisture content of the coated rice seeds used in the present invention refers to the value measured by drying a 10 g sample at 105° C. for 1 hour using an infrared moisture meter. As an infrared moisture meter, FD-610 manufactured by Kett Electric Laboratory can be used. Additionally, instead of a seedling box, a mat or plastic sheet can be used, spread thinly on top, and left to dry.

Next, a method for producing coated rice seeds having a coating layer containing zinc oxide, the present synthetic resin, and the present inorganic compound, and the surfactant is retained on the surface of the layer (hereinafter referred to as “this production method 2”) Explain. This production method 2 includes the following steps.

(1) adding the latex, the inorganic compound, and zinc oxide while moving and rolling the rice seeds to form a coating layer containing the synthetic resin, the inorganic compound, and zinc oxide, (2) the coating layer obtained in step (1) adding a surfactant while moving and rolling the seeds to retain the surfactant on the outside of the layer formed by step (1), and (3) drying the seeds obtained in step (2).

This production method 2 has a similar process to this production method 1 except that a powder composition containing zinc oxide and this inorganic compound (hereinafter referred to as “powder composition Z”) is used instead of zinc oxide.

The total amount of zinc oxide added in this production method 2 is usually in the range of 0.01 to 200 parts by weight, preferably 0.1 to 100 parts by weight, and more preferably 0.1 to 50 parts by weight, based on 100 parts by weight of dried rice seeds. Considering the impact on plant growth and the environment, the range of 0.1 to 25 parts by weight is preferable. The total amount of the inorganic compound added is usually in the range of 1 to 399.9 parts by weight, preferably 1 to 199.9 parts by weight, and more preferably 1 to 99.9 parts by weight, based on 100 parts by weight of dried rice seeds. The total amount of powder composition Z added is usually in the range of 5 to 400 parts by weight, preferably 5 to 200 parts by weight, more preferably 10 to 100 parts by weight, based on 100 parts by weight of dry rice seeds. The total amount of the synthetic resin added is usually in the range of 0.025 to 25 parts by weight, preferably 0.05 to 8 parts by weight, and more preferably 0.1 to 4 parts by weight, based on 100 parts by weight of dried rice seeds. The weight ratio of this synthetic resin to the powder composition Z is usually 1:200 to 1:10, preferably 1:100 to 1:25.

Next, a first layer having a coating layer containing zinc oxide, the present synthetic resin, and the present inorganic compound, the coating layer containing the present inorganic compound and the present synthetic resin, and the zinc oxide and the present invention provided on the outside of the first layer. A method for producing coated rice seeds having a second layer containing a synthetic resin and having a surfactant retained on its surface (hereinafter referred to as “this production method 3”) will be described. This production method 3 includes the following steps.

(1) (I) adding the latex and the inorganic compound while moving and rolling the rice seeds to form a coating layer containing the synthetic resin and the inorganic compound, and (II) moving and rolling the seeds obtained in step (I). Adding the present latex and zinc oxide to form a coating layer containing the present synthetic resin and zinc oxide on the outside of the layer formed in step (I), (2) moving and rolling the seed obtained in step (1) to apply a surfactant. adding a surfactant to the outside of the layer formed in step (1), and (3) drying the seeds obtained in step (2).

In this production method 3, first, the step of adding this latex and this inorganic compound while moving and rolling the soaked rice seeds to form a coating layer containing this synthetic resin and this inorganic compound (hereinafter referred to as “Step I”). Conduct. Step I can be carried out according to a procedure similar to Step 1 in Preparation Method 1 except that the present inorganic compound is used instead of zinc oxide. After carrying out Step I, adding the latex and zinc oxide while moving and rolling the seed obtained in Step I to form a coating layer containing the present synthetic resin and zinc oxide on the outside of the layer formed by Step I (hereinafter referred to as “step”) Write as “II”). Step II can be carried out according to a procedure similar to Step 1 in Manufacturing Method 1.

The total amount of the inorganic compound added in this production method 3 is usually in the range of 5 to 400 parts by weight, preferably 5 to 200 parts by weight, and more preferably 10 to 100 parts by weight, based on 100 parts by weight of dried rice seeds. The total amount of zinc oxide added is usually in the range of 0.01 to 200 parts by weight, preferably 0.1 to 100 parts by weight, and more preferably 0.1 to 50 parts by weight, based on 100 parts by weight of dried rice seeds. Considering the impact on plant growth and the environment, the range of 0.1 to 25 parts by weight is preferable. The total amount of the synthetic resin added is usually in the range of 0.025 to 25 parts by weight, preferably 0.05 to 8 parts by weight, and more preferably 0.1 to 4 parts by weight, based on 100 parts by weight of dried rice seeds. The weight ratio of the total amount of the present synthetic resin to the total amount of the zinc oxide and the total amount of the inorganic compound is usually 1:200 to 1:10, preferably 1:100 to 1:25.

After performing Step II, Step 2 and subsequent steps of this manufacturing method 1 are performed similarly.

Next, a method for producing coated rice seeds having a main coating layer 2 containing iron oxide and a surfactant retained on the surface of the layer (hereinafter referred to as “present production method 4”) will be described. This production method 4 includes the following steps.

(1) forming the main coating layer 2 by adding zinc oxide, iron oxide, and an aqueous dispersion of the present synthetic resin while moving and rolling the rice seeds, (2) adding a surfactant while moving and rolling the rice seeds obtained in step (1) thereby retaining the surfactant on the outside of the main coating layer 2 formed in step (1), and (3) drying the rice seeds obtained in step (2).

In this production method 4, first, while moving and rolling the soaked rice seeds, a powder composition containing an aqueous dispersion of the present synthetic resin and zinc oxide and iron oxide (hereinafter referred to as “powder composition T”) is added to form the present coating layer 2. The forming step (hereinafter referred to as “step 1’”) is performed. The aqueous dispersion of this synthetic resin can be used by arbitrarily diluting this synthetic resin commercially available in latex form with water. In step 1', first the present latex can be added and then the powder composition T can be added, and the order can be reversed. Additionally, the present latex and powder composition T can be added simultaneously. The powder composition T and the present latex are added while constantly being in contact with the rice seeds in a rolling state. In the present latex, the content of the present synthetic resin is usually used in the range of 20 to 65%, preferably 30 to 60%, more preferably 30 to 40% (all of these represent weight percent relative to the latex). Methods for adding the present latex may include dripping and spraying. After adding the present latex and the powder composition T, the powder composition T is attached to the rice seeds using the present latex as a binder while maintaining a rolling state.

The total amount of zinc oxide added in this production method 4 is usually in the range of 0.01 to 200 parts by weight, preferably 0.1 to 100 parts by weight, and more preferably 0.1 to 50 parts by weight, based on 100 parts by weight of dried rice seeds. Considering the effect on plant growth and the environment, the preferred range is 0.1 to 25 parts by weight. The total amount of iron oxide added is usually in the range of 1 to 399.9 parts by weight, preferably 1 to 199.9 parts by weight, and more preferably 1 to 99.9 parts by weight, based on 100 parts by weight of dry rice seeds. The total amount of the powder composition T added is usually in the range of 5 to 400 parts by weight, preferably 5 to 200 parts by weight, and more preferably 10 to 100 parts by weight, based on 100 parts by weight of dry rice seeds. The total amount of the synthetic resin added is usually in the range of 0.025 to 25 parts by weight, preferably 0.05 to 8 parts by weight, and more preferably 0.1 to 4 parts by weight, based on 100 parts by weight of dried rice seeds. The weight ratio of the present synthetic resin to the powder composition T is usually in the range of 1:200 to 1:10, preferably 1:100 to 1:25.

In Step 1', a uniform coating layer can be formed by dividing and adding the powder composition T and the present synthetic resin and repeating Step 1'. In this case, the one-time addition amount of the powder composition T is usually about 1 to 1/10, preferably about 1/2 to 1/5 of the total addition amount of the powder composition T. Additionally, the amount of the synthetic resin added at one time may vary depending on the state of the coating, but is usually about 1 to 1/10, preferably about 1/2 to 1/5, of the total amount of the synthetic resin added. As used in the present invention, the amount of this synthetic resin added at one time means the amount of this synthetic resin required to cause the entire amount of powder composition T added at once to adhere to rice seeds. The powder composition T and the present synthetic resin do not need to be added alternately, but may be added depending on the state of the coating. Only water can be added as needed. The total amount of water added is usually about 1/2 to 1/100, preferably about 1/3 to 1/10, of the total amount of the powder composition T. The total amount of water added includes the amount of water used to dilute the latex.

In step 1', when the powder composition T adheres to the inner wall of the device, almost the entire amount of the added powder composition T can be adhered to the rice seeds by scraping off the powder composition T using a scraper.

After performing step 1', adding a surfactant while moving and rolling the seeds obtained in step 1' to retain the surfactant on the outside of the main coating layer 2 formed by step 1' (hereinafter referred to as "step 2'") carry out. In step 2', after performing step 1', a surfactant may be added while maintaining the rolling state of moving the rice seed to retain the surfactant on the outside of the main coating layer 2.

After performing step 2', a step of drying the seeds obtained in step 2' is performed to obtain the rice seeds. Specifically, after performing step 2', the rice seeds are taken out from the device, placed in a seedling box, spread thinly in the seedling box, and allowed to stand to dry. Rice seeds are usually dried until the moisture content is less than 20% (% by weight of coated rice seeds). The moisture content of the coated rice seeds used in the present invention refers to the value measured by drying a 10 g sample at 105° C. for 1 hour using an infrared moisture meter. As an infrared moisture meter, FD-610 manufactured by Kett Electric Laboratory can be used. Additionally, instead of a seedling box, a mat or plastic sheet can be used, spread thinly on top, and left to dry.

Next, it has a main coating layer 2 having a first layer containing iron oxide and the present synthetic resin and a second layer containing zinc oxide and the present synthetic resin provided on the outside of the first layer, and a surfactant is applied to the surface of the layer. A method for producing coated rice seeds retained in (hereinafter referred to as “this production method 5”) will be described. This production method 5 includes the following steps.

(1') (i) adding latex and iron oxide while moving and rolling the rice seeds to form a coating layer containing the synthetic resin and iron oxide, and (ii) forming a coating layer containing the synthetic resin and iron oxide while moving and rolling the seeds obtained in step (i). Adding latex and zinc oxide to form a coating layer containing the synthetic resin and zinc oxide on the outside of the layer formed in step (i), (2') adding a surfactant while moving and rolling the seed obtained in step (1') adding to retain the surfactant on the outside of the layer formed by step (1'), and (3') drying the seeds obtained in step (2').

In this production method 5, first, the step of adding this latex and iron oxide while moving and rolling the soaked rice seeds to form a coating layer containing this synthetic resin and iron oxide (hereinafter referred to as “step i”) is carried out. . Step i can be carried out according to a procedure similar to step 1' in Preparation Method 4 except that iron oxide is used instead of powder composition T. After carrying out step i, adding the present latex and zinc oxide while moving and rolling the seeds obtained in step i to form a coating layer containing the present synthetic resin and zinc oxide on the outside of the layer formed by step i (hereinafter referred to as "step (Write as ii"). Step ii can be carried out following a procedure similar to step i except that zinc oxide is used instead of iron oxide.

The total amount of iron oxide added in this production method 5 is usually in the range of 5 to 400 parts by weight, preferably 5 to 200 parts by weight, and more preferably 10 to 100 parts by weight, based on 100 parts by weight of dried rice seeds. The total amount of zinc oxide added is usually in the range of 0.01 to 200 parts by weight, preferably 0.1 to 100 parts by weight, and more preferably 0.1 to 50 parts by weight, based on 100 parts by weight of dried rice seeds. Considering the impact on plant growth and the environment, the range of 0.1 to 25 parts by weight is preferable. The total amount of the synthetic resin added is usually in the range of 0.025 to 25 parts by weight, preferably 0.05 to 8 parts by weight, and more preferably 0.1 to 4 parts by weight, based on 100 parts by weight of dried rice seeds. The weight ratio of the total amount of the synthetic resin added to the total amount of zinc oxide and the total amount of iron oxide is usually 1:200 to 1:10, preferably 1:100 to 1:25.

After performing step ii, steps 2' and beyond of this manufacturing method 4 are performed similarly.

This rice seed can be used in direct seeding cultivation of paddy rice, which is carried out by directly sowing this rice seed in the paddy field. The rice fields used in the present invention refer to freshwater rice fields and flooded rice fields. Specifically, sowing was carried out according to the method described in Minoru Yamauchi, "A manual for direct sowing of iron-coated rice on a flooded paddy field 2010", The National Agriculture and Food Research Organization, Western Region Agricultural Research Center, March 2010. do. At that time, a direct seeding machine for iron coating such as Tetsumakichan (manufactured by Kubota Corporation) can be used. Good parent seedlings are achieved by sowing by such conventional methods. After sowing, rice can be grown by maintaining normal cultivation conditions.

Pesticides and fertilizers may be applied before, at the same time as, or after sowing. Pesticides include fungicides, insecticides, and herbicides.

Example

The present invention will be explained in more detail by examples.

First, production examples and comparative production examples are shown.

In the following production examples and comparative production examples, unless otherwise stated, seeds of the Hinohikari variety were used as rice seeds, and iron oxide with an average particle diameter of 42.7 ㎛ with an α-Fe ₂ O ₃ content of 78% was used. The manufacturing process was carried out at room temperature (about 20°C). Additionally, % represents weight%.

In addition, the brand names used in the production examples and comparative production examples are as follows.

Zinc Oxide 3N5: Zinc Oxide, KANTO CHEMICAL CO., INC. 1st, average particle size; 7.7 ㎛

Zinc oxide (first grade): Zinc oxide, NIPPON CHEMICAL INDUSTRIAL CO.,LTD. 1st, average particle size; 0.26 ㎛

Zinc oxide second grade: Zinc oxide, NIPPON CHEMICAL INDUSTRIAL CO.,LTD. 1st, average particle size; 0.24 ㎛

For calcium carbonate granules: Calcium carbonate, YAKUSEN SEKKAI Co.,Ltd. 1st, average particle size; 6.2 ㎛

Calcium Carbonate G-100: Calcium Carbonate, Sankyo Seifun Co., Ltd. 1st, average particle size; 46.0 ㎛

SS#80: Calcium Carbonate, Nitto Funka Kogyo K.K. 1st, average particle size; 4.6 ㎛

Barite: Barium sulfate, neoraito kousan co.,ltd. 1st, average particle size; 12.4 ㎛

SHOKOZAN CLAY S: Pyrophyllite, SHOKOZAN MINING Co., Ltd. 1st, average particle size; 6.7 ㎛

For DL CLAY powder: Pyrophyllite, SHOKOZAN MINING Co., Ltd. 1st, average particle size; 30.3 ㎛

Rutile powder: titanium oxide, KINSEI MATEC CO., LTD. 1st, average particle size; 14.6 ㎛

Sun Zeolite MGF: Zeolite, Sun Zeolite Industry Co., Ltd. 1st, average particle size; 116㎛

Magnesium Oxide: Magnesium Oxide, Wako Pure Chemical Industries, Ltd. 1st, average particle size; 14.9㎛

DAE1K: Iron, DOWA IP CREATION CO., LTD. my

KTS-1: Calcined gypsum, Yoshino Gypsum Sales Co., Ltd. my

Mowinyl-Powder DM2072P: copolymer consisting of vinyl acetate, vinyl versatate, and acrylic acid alkyl ester, Tg; 14℃, content of synthetic resin; 85%, Nippon Synthetic Chemical Industry Co., Ltd. my

Mowinyl-Powder LDM7000P: Copolymer consisting of alkyl acrylic acid and alkyl methacrylic acid, Tg; 8℃, content of synthetic resin; 85%, Nippon Synthetic Chemical Industry Co., Ltd. my

Mowinyl6485: Copolymer composed of acrylic acid ester and styrene, Tg; -22℃, content of synthetic resin; 55%, Nippon Synthetic Chemical Industry Co., Ltd. my

NALSTAR SR140: carboxylated butadiene-styrene-methyl methacrylate copolymer, Tg; -12℃, content of synthetic resin; 48.5%, NIPPON A&L INC. my

SUMIKAFLEX808HQ: copolymer composed of ethylene, vinyl acetate, and vinyl chloride, Tg; 25℃, content of synthetic resin; 50%, made by Sumika Chemtex Company, Limited

SUPERFLEX500M: Urethane resin made by polymerizing aliphatic isocyanate and polyester polyol, Tg; -39℃, content of synthetic resin; 45%, DKS Co. Ltd. my

SORPOL5080: Polyoxyethylene tristyrylphenyl ether, TOHO Chemical Industry Co., Ltd. my

Mowinyl180E: copolymer composed of vinyl acetate and ethylene, Tg; -15℃, content of synthetic resin; 55%, Nippon Synthetic Chemical Industry Co., Ltd. my

Manufacturing Example 1

First, we manufactured a simple seed coating machine to coat a small amount of rice seeds. As shown in Fig. 1, a polyethylene cup (2) with a capacity of 500 mL is fixed to the end of the shaft (1), and it is placed in the mixer (3) (Three-One Motor, manufactured by Shinto Scientific Co., Ltd.). A simple seed coating machine was produced by inserting it into the drive shaft, tilting the mixer 3 so that the elevation angle was 45 degrees, and fixing it on the stand 4.

After that, 10.0 g of zinc oxide 3N5 and 0.2 g of Mowinyl-Powder DM2072P were mixed to obtain a powder composition (1).

About 100 mL of water was poured into a 200 mL polyethylene cup, and 20 g of dried rice seeds were added thereto, followed by soaking for 10 minutes. Thereafter, the rice seeds were taken out of the water, excess moisture adhering to the surface was removed, and the rice seeds were then placed into a polyethylene cup (2) fixed to a simple seed coating machine that was manufactured. The simple seed coating machine is operated at a rotation speed of the mixer (3) in the range of 130 to 140 rpm to move and roll the rice seeds, and then water is sprayed on the rice seeds with a sprayer while about 1/4 of 10.2 g of the powder composition (1) is applied. (about 2.5 g) was added to the rice seeds to cause the powder composition (1) to adhere to the rice seeds. When the powder composition (1) adheres to the inner wall of the polyethylene cup (2), the powder composition (1) is scraped off using a spatula to transfer almost the entire amount of the powder composition (1) added at once to the rice seeds. attached to. By repeating similar operations three times, 10.2 g of the powder composition (1) was adhered to the rice seeds to form a coating layer. The total amount of water used for coating was 2.7 g. Afterwards, while maintaining the operation of the simple seed coating machine, 0.1 g of SORPOL5080 was added to the rice seeds and adhered to the outside of the coating layer while the rice seeds were moved and rolled. The coated rice seeds taken out from the simple seed coating machine were spread on a stainless steel tray without overlapping and dried overnight to obtain the coated rice seeds (1) of the present invention.

Production example 2

Zero point was mixed with two grams (0.22 g) of SUPERFLEX500M and 0.19 g of water to obtain 0.41 g of SUPERFLEX500M water-dilution.

The following operation was performed according to the method described in Production Example 1. After soaking twenty grams (20 g) of dried rice seeds, about 1/4 (about 0.1 g) of 0.41 g of SUPERFLEX500M water-diluted solution was added dropwise using a dropper, while about 1/4 of 1 g of zinc oxide ( About 0.25 g) was added to the rice seeds to cause zinc oxide to attach to the rice seeds. When attaching the zinc oxide to the inner wall of the polyethylene cup 2, the zinc oxide was scraped off using a spatula so that almost the entire amount of the zinc oxide added at once was attached to the rice seeds. By repeating similar operations three times, 1 g of a kind of zinc oxide was attached to the rice seeds to form a coating layer. The total amount of water used for coating was 0.5 g. Afterwards, while maintaining the operation of the simple seed coating machine, 0.1 g of SORPOL5080 was added to the rice seeds and adhered to the outside of the coating layer while the rice seeds were moved and rolled. The coated rice seeds taken out from the simple seed coating machine were spread out on a stainless steel tray without overlapping and dried overnight to obtain the coated rice seeds (2) of the present invention.

Production example 3

Zero Point Two grams (0.2 g) of SUMIKAFLEX808HQ and 0.2 g of water were mixed to obtain 0.4 g of SUMIKAFLEX808HQ water-dilution.

The following operations were performed according to the method described in Production Example 2. Using 0.4 g of the SUMIKAFLEX808HQ water-diluent instead of 0.41 g of the SUPERFLEX500M water-diluent, 0.4 g of the SUMIKAFLEX808HQ water-diluted solution and 1 g of a kind of zinc oxide were added in four portions to form a coating layer, followed by the coating layer of the coating layer. Coated rice seeds (3) of the present invention were obtained by attaching 0.1 g of SORPOL5080 to the outside. The total amount of water used for coating was 0.4 g.

Production example 4

Five grams (5.0 g) of zinc oxide heterogeneous, 15.0 g of calcium carbonate G-100, and 0.4 g of Mowinyl-Powder LDM7000P were mixed to obtain a powder composition (2). The average particle diameter of the powder composition (2) was 34.1 μm, and its apparent relative density was 0.96 g/mL.

The following operation was performed according to the method described in Production Example 1. Instead of 10.2 g of the powder composition (1), 20.4 g of the powder composition (2) was used, the composition was added in four parts to form a coating layer, and then 0.2 g of SORPOL5080 was attached to the outside of the coating layer to prepare the present invention. Coated rice seeds (4) were obtained. The total amount of water used for coating was 2.8 g.

Production example 5

A powder composition (3) was obtained by mixing one gram (0.1 g) of zinc oxide heterogeneous, 9.9 g of calcium carbonate G-100, and 0.4 g of Mowinyl-Powder LDM7000P. The average particle diameter of the powder composition (3) was 40.1 μm, and its apparent relative density was 1.31 g/mL.

The following operation was performed according to the method described in Production Example 1. Instead of 10.2 g of the powder composition (1), 10.4 g of the powder composition (3) was used, the composition was added in four parts to form a coating layer, and then 0.4 g of SORPOL5080 was attached to the outside of the coating layer to prepare the present invention. Coated rice seeds (5) were obtained. The total amount of water used for coating was 1.1 g.

Production example 6

A powder composition (4) was obtained by mixing zero grams (0.5 g) of zinc oxide heterogeneous, 9.5 g of calcium carbonate G-100, and 0.4 g of Mowinyl-Powder LDM7000P. The average particle diameter of the powder composition (4) was 35.0 μm, and its apparent relative density was 1.18 g/mL.

The following operation was performed according to the method described in Production Example 1. Instead of 10.2 g of the powder composition (1), 10.4 g of the powder composition (4) was used, the composition was added in four parts to form a coating layer, and then 0.4 g of SORPOL5080 was attached to the outside of the coating layer to prepare the present invention. Coated rice seeds (6) were obtained. The total amount of water used for coating was 1.6 g.

Production example 7

A powder composition (5) was obtained by mixing one gram (0.1 g) of zinc oxide heterogeneous, 4.9 g of calcium carbonate G-100, 5.0 g of barite, and 0.4 g of Mowinyl-Powder LDM7000P. The average particle diameter of the powder composition (5) was 26.0 μm, and its apparent relative density was 1.43 g/mL.

The following operation was performed according to the method described in Production Example 1. Instead of 10.2 g of the powder composition (1), 10.4 g of the powder composition (5) was used, the composition was added in four parts to form a coating layer, and then 0.4 g of SORPOL5080 was attached to the outside of the coating layer to prepare the present invention. Coated rice seeds (7) were obtained. The total amount of water used for coating was 1.2 g.

Production example 8

Five grams (2.5 g) of zinc oxide and 7.5 g of calcium carbonate G-100 were mixed to obtain a powder composition (6). The average particle diameter of the powder composition (6) was 21.5 μm, and its apparent relative density was 1.02 g/mL.

Additionally, 0.36 g of Mowinyl6485 and 0.57 g of water were mixed to obtain 0.93 g of Mowinyl6485 water-diluted solution.

The following operations were performed according to the method described in Production Example 2. Each composition or liquid was divided into 4 parts, using 10 g of the powder composition (6) instead of 1 g of zinc oxide and 0.93 g of the water-dilution of Mowinyl6485 instead of 0.41 g of the water-dilution of SUPERFLEX500M. was added to form a coating layer, and then 0.1 g of SORPOL5080 was attached to the outside of the coating layer to obtain coated rice seeds (8) of the present invention. The total amount of water used for coating was 1.3 g.

Production example 9

Five grams (5.0 g) of zinc oxide 3N5 and 5.0 g of calcium carbonate granules were mixed to obtain a powder composition (7). The average particle diameter of the powder composition (7) was 9.47 μm, and its apparent relative density was 0.97 g/mL.

Additionally, 0.41 g of NALSTAR SR140 and 0.26 g of water were mixed to obtain 0.67 g of NALSTAR SR140 water-dilution.

The following operations were performed according to the method described in Production Example 2. Divide each composition or liquid into four portions, using 10 g of the powder composition (7) instead of 1 g of zinc oxide and 0.67 g of the NALSTAR SR140 water-diluent instead of 0.41 g of the SUPERFLEX500M water-diluent. was added to form a coating layer, and then 0.1 g of SORPOL5080 was attached to the outside of the coating layer to obtain coated rice seeds (9) of the present invention. The total amount of water used for coating was 2.5 g.

Production example 10

Ten zero grams (10.0 g) of zinc oxide 3N5, 2.5 g of SS#80, and 7.5 g of calcium carbonate G-100 were mixed to obtain powder composition (8). The average particle diameter of the powder composition (8) was 14.6 μm, and its apparent relative density was 1.03 g/mL.

Additionally, 0.82 g of NALSTAR SR140 and 0.31 g of water were mixed to obtain 1.13 g of NALSTAR SR140 water-dilution.

The following operations were performed according to the method described in Production Example 2. Divide each composition or liquid into four portions, using 20 g of the powder composition (8) instead of 1 g of zinc oxide and 1.13 g of the NALSTAR SR140 water-diluent instead of 0.41 g of the SUPERFLEX500M water-diluent. was added to form a coating layer, and then 0.1 g of SORPOL5080 was attached to the outside of the coating layer to obtain coated rice seeds (10) of the present invention. The total amount of water used for coating was 3.3 g.

Production example 11

Twenty-point zero grams (20.0 g) of zinc oxide 3N5, 5.0 g of SS#80, and 15.0 g of calcium carbonate G-100 were mixed to obtain powder composition (9). The average particle diameter of the powder composition (9) was 14.6 μm, and its apparent relative density was 1.03 g/mL.

Additionally, 1.65 g of NALSTAR SR140 and 0.27 g of water were mixed to obtain 1.92 g of NALSTAR SR140 water-dilution.

The following operations were performed according to the method described in Production Example 2. Divide each composition or liquid into four portions, using 40 g of the powder composition (9) instead of 1 g of zinc oxide and 1.92 g of the NALSTAR SR140 water-diluent instead of 0.41 g of the SUPERFLEX500M water-diluent. was added to form a coating layer, and then 0.1 g of SORPOL5080 was attached to the outside of the coating layer to obtain coated rice seeds (11) of the present invention. The total amount of water used for coating was 7.9 g.

Production example 12

Eighty-two grams (0.82 g) of NALSTAR SR140 and 0.37 g of water were mixed to obtain 1.19 g of NALSTAR SR140 water-dilution.

The following operations were performed according to the method described in Production Example 9. Using 1.19 g of the above NALSTAR SR140 water-diluent instead of 0.67 g of the NALSTAR SR140 water-diluent, each liquid and 10 g of the powder composition (7) were added in four portions to form a coating layer, followed by the coating layer of the coating layer. Coated rice seeds (12) of the present invention were obtained by attaching 0.1 g of SORPOL5080 to the outside. The total amount of water used for coating was 1.3 g.

Production Example 13

Four grams (0.41 g) of NALSTAR SR140 and 0.36 g of water were mixed to obtain 0.77 g of NALSTAR SR140 water-dilution.

The following operations were performed according to the method described in Production Example 9. Using 0.77 g of the NALSTAR SR140 water-diluent instead of 0.67 g of the NALSTAR SR140 water-diluent, each liquid and 10 g of the powder composition (7) were added in four portions to form a coating layer, followed by the coating layer of the coating layer. Coated rice seeds (13) of the present invention were obtained by attaching 0.2 g of SORPOL5080 to the outside. The total amount of water used for coating was 2.5 g.

Production example 14

Five grams (5.0 g) of zinc oxide 3N5, 5.0 g of calcium carbonate granules, and 0.2 g of SORPOL5080 were mixed to obtain a powder composition (10).

Additionally, 0.82 g of NALSTAR SR140 and 0.24 g of water were mixed to obtain 1.06 g of NALSTAR SR140 water-dilution.

The following operations were performed according to the method described in Production Example 2. Divide each composition or liquid into four portions, using 10.2 g of the powder composition (10) instead of 1 g of zinc oxide and 1.06 g of the NALSTAR SR140 water-diluent instead of 0.41 g of the SUPERFLEX500M water-diluent. was added to form a coating layer, and then 0.1 g of SORPOL5080 was attached to the outside of the coating layer to obtain coated rice seeds (14) of the present invention. The total amount of water used for coating was 1.6 g.

Production Example 15

Powder composition (11) was obtained by mixing eight grams (8.0 g) of zinc oxide 3N5 and 2.0 g of barite. The average particle diameter of the powder composition (11) was 10.5 μm, and its apparent relative density was 1.07 g/mL.

Additionally, 0.41 g of NALSTAR SR140 and 0.22 g of water were mixed to obtain 0.63 g of NALSTAR SR140 water-dilution.

The following operations were performed according to the method described in Production Example 2. Divide each composition or liquid into four portions, using 10 g of the powder composition (11) instead of 1 g of zinc oxide and 0.63 g of the NALSTAR SR140 water-diluent instead of 0.41 g of the SUPERFLEX500M water-diluent. was added to form a coating layer, and then 0.1 g of SORPOL5080 was attached to the outside of the coating layer to obtain coated rice seeds (15) of the present invention. The total amount of water used for coating was 2.0 g.

Production example 16

A powder composition (12) was obtained by mixing 9.0 g of zinc oxide 3N5 and 1.0 g of SHOKOZAN CLAY S. The average particle diameter of the powder composition (12) was 10.3 μm, and its apparent relative density was 0.94 g/mL.

Additionally, 0.41 g of NALSTAR SR140 and 0.45 g of water were mixed to obtain 0.86 g of NALSTAR SR140 water-dilution.

The following operations were performed according to the method described in Production Example 2. Divide each composition or liquid into four portions, using 10 g of the powder composition (12) instead of 1 g of zinc oxide and 0.86 g of the NALSTAR SR140 water-diluent instead of 0.41 g of the SUPERFLEX500M water-diluent. was added to form a coating layer, and then 0.1 g of SORPOL5080 was attached to the outside of the coating layer to obtain coated rice seeds (16) of the present invention. The total amount of water used for coating was 2.4 g.

Production Example 17

A powder composition (13) was obtained by mixing one zero gram (1.0 g) of zinc oxide and 9.0 g of rutile powder. The average particle diameter of the powder composition (13) was 8.6 μm.

Additionally, 0.41 g of NALSTAR SR140 and 0.47 g of water were mixed to obtain 0.89 g of NALSTAR SR140 water-dilution.

The following operations were performed according to the method described in Production Example 2. Divide each composition or liquid into four portions, using 10 g of the powder composition (13) instead of 1 g of zinc oxide and 0.89 g of the NALSTAR SR140 water-diluent instead of 0.41 g of the SUPERFLEX500M water-diluent. was added to form a coating layer, and then 0.1 g of SORPOL5080 was attached to the outside of the coating layer to obtain coated rice seeds (17) of the present invention. The total amount of water used for coating was 1.1 g.

Production Example 18

Five grams (5.0 g) of zinc oxide heterogeneous and 5.0 g of barite were mixed to obtain powder composition (14). The average particle diameter of the powder composition (14) was 1.6 μm, and its apparent relative density was 0.87 g/mL.

Additionally, 0.41 g of NALSTAR SR140 and 0.98 g of water were mixed to obtain 1.39 g of NALSTAR SR140 water-dilution.

The following operations were performed according to the method described in Production Example 2. Divide each composition or liquid into four portions, using 10 g of the powder composition (14) instead of 1 g of zinc oxide and 1.39 g of the NALSTAR SR140 water-diluent instead of 0.41 g of the SUPERFLEX500M water-diluent. was added to form a coating layer, and then 0.1 g of SORPOL5080 was attached to the outside of the coating layer to obtain coated rice seeds (18) of the present invention. The total amount of water used for coating was 1.6 g.

Production Example 19

Five grams (5.0 g) of zinc oxide heterogeneous and 5.0 g of rutile powder were mixed to obtain a powder composition (15). The average particle diameter of the powder composition (15) was 1.6 μm.

Additionally, 0.41 g of NALSTAR SR140 and 0.99 g of water were mixed to obtain 1.4 g of NALSTAR SR140 water-dilution.

The following operations were performed according to the method described in Production Example 2. Divide each composition or liquid into four portions, using 10 g of the powder composition (15) instead of 1 g of zinc oxide and 1.4 g of the NALSTAR SR140 water-diluent instead of 0.41 g of the SUPERFLEX500M water-diluent. was added to form a coating layer, and then 0.1 g of SORPOL5080 was attached to the outside of the coating layer to obtain coated rice seeds (19) of the present invention. The total amount of water used for coating was 1.7 g.

Production example 20

Five grams (5.0 g) of zinc oxide heterogeneous and 5.0 g of SHOKOZAN CLAY S were mixed to obtain a powder composition (16). The average particle diameter of the powder composition (16) was 3.3 μm, and its apparent relative density was 0.67 g/mL.

Additionally, 0.41 g of NALSTAR SR140 and 0.99 g of water were mixed to obtain 1.4 g of NALSTAR SR140 water-dilution.

The following operations were performed according to the method described in Production Example 2. Divide each composition or liquid into four portions, using 10 g of the powder composition (16) instead of 1 g of zinc oxide and 1.4 g of the NALSTAR SR140 water-diluent instead of 0.41 g of the SUPERFLEX500M water-diluent. was added to form a coating layer, and then 0.1 g of SORPOL5080 was attached to the outside of the coating layer to obtain coated rice seeds (20) of the present invention. The total amount of water used for coating was 2.24 g.

Production example 21

Five grams (5.0 g) of zinc oxide heterogeneous and 5.0 g of DL CLAY for powder were mixed to obtain a powder composition (17). The average particle diameter of the powder composition (17) was 16.9 μm.

Additionally, 0.41 g of NALSTAR SR140 and 0.99 g of water were mixed to obtain 1.4 g of NALSTAR SR140 water-dilution.

The following operations were performed according to the method described in Production Example 2. Divide each composition or liquid into four portions, using 10 g of the powder composition (17) instead of 1 g of zinc oxide and 1.4 g of the NALSTAR SR140 water-diluent instead of 0.41 g of the SUPERFLEX500M water-diluent. was added to form a coating layer, and then 0.1 g of SORPOL5080 was attached to the outside of the coating layer to obtain coated rice seeds (21) of the present invention. The total amount of water used for coating was 1.87 g.

Production example 22

Five grams (5.0 g) of zinc oxide heterogeneous and 5.0 g of Sun Zeolite MGF were mixed to obtain a powder composition (18). The average particle diameter of the powder composition (18) was 45.0 μm.

Additionally, 0.41 g of NALSTAR SR140 and 1.25 g of water were mixed to obtain 1.66 g of NALSTAR SR140 water-dilution.

The following operations were performed according to the method described in Production Example 2. Divide each composition or liquid into four portions, using 10 g of the powder composition (18) instead of 1 g of zinc oxide and 1.66 g of the NALSTAR SR140 water-diluent instead of 0.41 g of the SUPERFLEX500M water-diluent. was added to form a coating layer, and then 0.1 g of SORPOL5080 was attached to the outside of the coating layer to obtain coated rice seeds (22) of the present invention. The total amount of water used for coating was 3.29 g.

Production example 23

Five grams (5.0 g) of heterogeneous zinc oxide and 5.0 g of magnesium oxide were mixed to obtain a powder composition (19). The average particle diameter of the powder composition (19) was 5.0 μm.

Additionally, 0.41 g of NALSTAR SR140 and 1.19 g of water were mixed to obtain 1.6 g of NALSTAR SR140 water-dilution.

The following operations were performed according to the method described in Production Example 2. Divide each composition or liquid into four portions, using 10 g of the powder composition (19) instead of 1 g of zinc oxide and 1.6 g of the NALSTAR SR140 water-diluent instead of 0.41 g of the SUPERFLEX500M water-diluent. was added to form a coating layer, and then 0.1 g of SORPOL5080 was attached to the outside of the coating layer to obtain coated rice seeds (23) of the present invention. The total amount of water used for coating was 3.5 g.

Manufacturing example 24

Calcium carbonate mixture A was obtained by mixing five grams (2.5 g) of SS#80 and 7.5 g of calcium carbonate G-100.

Additionally, 0.41 g of NALSTAR SR140 and 0.21 g of water were mixed to obtain 0.62 g of NALSTAR SR140 water-dilution (hereinafter referred to as “diluent A”), and 0.41 g of NALSTAR SR140 and 0.26 g of water were mixed to obtain 0.67 g of water-diluent solution. g of NALSTAR SR140 water-dilution solution (hereinafter referred to as “dilution B”) was obtained.

The following operation was performed according to the method described in Production Example 1. After soaking twenty grams (20 g) of dried rice seeds, operate the simple seed coating machine to move and roll the rice seeds, and add about 1/4 (about 0.15 g) of diluent A dropwise using a dropper to apply calcium carbohydrate. About 1/4 (about 2.5 g) of 10 g of Nate Mixture A was added to the rice seeds to cause calcium carbonate to attach to the rice seeds. When the calcium carbonate mixture A adheres to the inner wall of the polyethylene cup (2), almost the entire amount of the calcium carbonate mixture A added at once is scraped off using a spatula. was attached to rice seeds. By repeating similar operations three times, 10 g of calcium carbonate mixture A was adhered to rice seeds to form a first coating layer containing calcium carbonate (hereinafter referred to as “first layer”). The total amount of water used for coating was 0.9 g.

Thereafter, while maintaining the operation of the simple seed coating machine and moving and rolling the rice seeds, about 1/4 (about 0.17 g) of diluent B was added dropwise using a dropper, while about 1/4 of 10 g of zinc oxide 3N5 was added dropwise. (about 2.5 g) was added to rice seeds to attach zinc oxide to the outside of the first layer. When zinc oxide 3N5 adhered to the inner wall of the polyethylene cup 2, zinc oxide 3N5 was scraped off using a spatula to cause almost the entire amount of zinc oxide 3N5 added at once to adhere to the rice seeds. By repeating the similar operation three times, 10 g of zinc oxide 3N5 was attached to the outside of the first layer to form a second coating layer containing zinc oxide (hereinafter referred to as “second layer”) on the outside of the first layer. I ordered it. The total amount of water used for coating was 4.8 g.

Under the condition of operating the simple seed coating machine to move and roll the rice seeds, 0.1 g of SORPOL5080 was added to the rice seeds and adhered to the outside of the second layer. The rice seeds taken out from the simple seed coating machine were spread out on a stainless steel tray without overlapping and dried overnight to obtain the coated rice seeds (24) of the present invention.

Production example 25

Seventy-point-zero (70.0) parts by weight of clothianidin and 30.0 parts by weight of SHOKOZAN CLAY S were mixed and pulverized with a centrifugal grinder to obtain powdered pesticide A. The average particle size of powdered pesticide A was 13.0 ㎛. Five grams (5.0 g) of granular calcium carbonate and 0.086 g of powdered pesticide A were mixed to obtain calcium carbonate mixture B.

Additionally, 0.21 g of NALSTAR SR140 and 0.35 g of water were mixed to obtain 0.56 g of NALSTAR SR140 water-diluent (hereinafter referred to as “diluent C”), and 0.21 g of NALSTAR SR140 and 0.35 g of water were mixed to obtain 0.56 g of NALSTAR SR140 water-diluent. g of NALSTAR SR140 water-diluted solution (hereinafter referred to as “diluent D”) was obtained.

The following operations were performed according to the method described in Production Example 24. Using 5.086 g of the calcium carbonate mixture B instead of 10 g of calcium carbonate mixture A and diluent C instead of diluent A, each mixture or liquid was added in four portions to form the first layer. formed. The total amount of water used for coating was 0.4 g.

Thereafter, the above diluted solution D was used instead of diluted solution B, the amount of zinc oxide 3N5 was changed to 5 g, and each liquid and zinc oxide were added in four portions to form a second layer. The total amount of water used for coating was 2.4 g. Finally, 0.1 g of SORPOL5080 was attached to the outside of the second layer to obtain the coated rice seed (25) of the present invention.

Production example 26

Seventy-point-zero (70.0) parts by weight of isotianyl and 30.0 parts by weight of SHOKOZAN CLAY S were mixed and pulverized with a centrifugal grinder to obtain powder pesticide B. The average particle size of powdered pesticide B was 6.8 ㎛. Eight points and seventy-three grams (8.73 g) of powdered pesticide A obtained in Production Example 25, 500.0 g of zinc oxide 3N5, and 11.6 g of powdered pesticide B were mixed to obtain a powder composition (20). The average particle diameter of the powder composition (20) was 8.4 μm.

Additionally, 20.6 g of NALSTAR SR140 and 5.0 g of water were mixed to obtain 25.6 g of NALSTAR SR140 water-dilution.

About 5 L of water was poured into a polyethylene bucket, 1 kg of dried rice seeds (Koshihikari) were added thereto, and soaked at about 10°C for 2 nights. Thereafter, the rice seeds were taken out of the water and allowed to stand to remove excess moisture on the surface, and then the rice seeds were placed into the drum of a seed coating machine (KC-151, manufactured by KEIBUNSHA Manufacturing Co., Ltd.). The inclination angle (elevation angle) of the drum was adjusted to be 45 degrees. While operating the seed coating machine (rotation speed of the drum; 21.9 rpm) and rolling the rice seeds, about 1/4 (about 6.4 g) of 25.6 g of NALSTAR SR140 water-diluted solution was sprayed with a sprayer to form the powder composition (20). About 1/4 of 520.33 g (about 130.1 g) was added to the rice seeds to cause the powder composition (20) to adhere to the rice seeds. When the powder composition (20) adhered to the inner wall of the drum, the powder composition (20) was scraped off using a dust pan to cause almost the entire amount of the powder composition (20) added at once to adhere to the rice seeds. By repeating similar operations three times, 520.33 g of the powder composition (20) was attached to the rice seeds to form a coating layer. The total amount of water used for coating was 5.0 g. Under the condition of moving and rolling the rice seeds while maintaining the operation of the seed coating machine, 5.0 g of SORPOL5080 was added to the rice seeds and adhered to the outside of the coating layer. Rice seeds taken out from the seed coating machine were spread out in a seedling box without overlapping and dried overnight to obtain coated rice seeds (26) of the present invention.

Manufacturing Example 27

Five grams (5.0 g) of zinc oxide 3N5 and 5.0 g of iron oxide were mixed to obtain powder composition (21). The average particle diameter of the powder composition (21) was 11.9 μm.

Additionally, 0.41 g of NALSTAR SR140 and 0.14 g of water were mixed to obtain 0.55 g of NALSTAR SR140 water-dilution.

About 100 mL of water was poured into a 200 mL polyethylene cup, and 20 g of dried rice seeds were added thereto, followed by soaking for 10 minutes. Thereafter, the rice seeds were taken out of the water, excess moisture adhering to the surface was removed, and the rice seeds were then placed into a polyethylene cup (2) fixed to a simple seed coating machine that was manufactured. The simple seed coating machine is operated at a rotation speed of the mixer (3) in the range of 130 to 140 rpm to move and roll the rice seeds, and then about 1/4 (about 0.14 g) of 0.55 g of NALSTAR SR140 water-diluted solution is added using a dropper. About 1/4 (about 2.5 g) of 10 g of the powder composition (21) was added to the rice seeds while adding dropwise, allowing the powder composition (21) to adhere to the rice seeds. When the powder composition (21) adheres to the inner wall of the polyethylene cup (2), use a spatula to scrape off the powder composition (21) to transfer almost the entire amount of the powder composition (21) added at once to the rice seeds. attached to. By repeating similar operations three times, 10 g of the powder composition (21) was adhered to rice seeds to form a coating layer. The total amount of water used for coating was 2.2 g. Thereafter, while maintaining the operation of the simple seed coating machine and rolling the rice seeds, 0.1 g of SORPOL5080 was added to the rice seeds and adhered to the outside of the coating layer. The coated rice seeds taken out from the simple seed coating machine were spread on a stainless steel tray without overlapping and dried overnight to obtain the coated rice seeds (27) of the present invention.

Manufacturing example 28

A powder composition (22) was obtained by mixing nine grams (9.0 g) of zinc oxide 3N5 and 1.0 g of iron oxide. The average particle diameter of the powder composition (22) was 8.6 μm.

Additionally, 0.36 g of Mowinyl180E and 0.34 g of water were mixed to obtain 0.7 g of Mowinyl180E water-diluted solution.

The following operations were performed according to the method described in Production Example 27. Each composition or liquid was prepared by using 10 g of the powder composition (22) instead of 10 g of the powder composition (21) and 0.7 g of the Mowinyl180E water-diluent instead of 0.55 g of the NALSTAR SR140 water-diluent. It was added in four portions to form a coating layer, and then 0.1 g of SORPOL5080 was attached to the outside of the coating layer to obtain coated rice seeds (28) of the present invention. The total amount of water used for coating was 2.3 g.

Manufacturing Example 29

At this point, zero grams (2.0 g) of heterogeneous zinc oxide and 18.0 g of iron oxide were mixed to obtain a powder composition (23). The average particle diameter of the powder composition (23) was 10.6 μm, and its apparent relative density was 1.89 g/mL.

Additionally, 0.41 g of NALSTAR SR140 and 0.40 g of water were mixed to obtain 0.81 g of NALSTAR SR140 water-dilution.

The following operations were performed according to the method described in Production Example 27. Each composition or liquid, using 20 g of the powder composition (23) instead of 10 g of the powder composition (21) and 0.81 g of the NALSTAR SR140 water-diluent instead of 0.55 g of the NALSTAR SR140 water-diluent. was added in four portions to form a coating layer, and then 0.1 g of SORPOL5080 was attached to the outside of the coating layer to obtain coated rice seeds (29) of the present invention. The total amount of water used for coating was 2.0 g.

Production example 30

Five grams (2.5 g) of this heterogeneous zinc oxide and 7.5 g of iron oxide were mixed to obtain a powder composition (24). The average particle diameter of the powder composition (24) was 2.7 μm, and its apparent relative density was 1.38 g/mL.

Additionally, 1.24 g of NALSTAR SR140 and 1.04 g of water were mixed to obtain 2.28 g of NALSTAR SR140 water-dilution.

The following operations were performed according to the method described in Production Example 27. Each composition or liquid, using 10 g of the powder composition (24) instead of 10 g of the powder composition (21) and 2.28 g of the NALSTAR SR140 water-diluent instead of 0.55 g of the NALSTAR SR140 water-diluent. was added in four portions to form a coating layer, and then 0.1 g of SORPOL5080 was attached to the outside of the coating layer to obtain coated rice seeds (30) of the present invention. The total amount of water used for coating was 1.1 g.

Production example 31

Zero Point Thirty-six grams (0.36 g) of Mowinyl180E and 0.19 g of water were mixed to obtain 0.55 g of Mowinyl180E water-dilution.

The following operations were performed according to the method described in Production Example 27. Using 0.55 g of the above-mentioned Mowinyl180E water-dilution instead of 0.55 g of the NALSTAR SR140 water-dilution, each liquid and 10 g of the powder composition (21) were added in four portions to form a coating layer, followed by the outer side of the coating layer. The coated rice seed (31) of the present invention was obtained by attaching 0.1 g of SORPOL5080 to. The total amount of water used for coating was 1.4 g.

Production example 32

Four grams (0.44 g) of SUPERFLEX500M and 0.17 g of water were mixed to obtain 0.61 g of SUPERFLEX500M water-dilution.

The following operations were performed according to the method described in Production Example 27. Using 0.61 g of the above SUPERFLEX500M water-diluent instead of 0.55 g of the NALSTAR SR140 water-diluent, each liquid and 10 g of the powder composition (21) were added in four portions to form a coating layer, followed by the outer side of the coating layer. The coated rice seed (32) of the present invention was obtained by attaching 0.1 g of SORPOL5080 to. The total amount of water used for coating was 1.8 g.

Production example 33

Five grams (2.5 g) of heterogeneous zinc oxide, 7.5 g of iron oxide, and 0.4 g of Mowinyl-Powder LDM7000P were mixed to obtain a powder composition (25). The average particle diameter of the powder composition (25) was 2.6 μm, and its apparent relative density was 1.33 g/mL.

The following operations were performed according to the method described in Production Example 27. Twenty grams (20 g) of dried rice seeds were soaked, a simple seed coating machine was operated to move and roll the rice seeds, and water was sprayed with a sprayer to apply about a quarter (about 2.5 g) of 10.4 g of the powder composition (25). By addition, the powder composition (25) was allowed to adhere to the rice seeds. When the powder composition (25) adheres to the inner wall of the polyethylene cup (2), use a spatula to scrape off the powder composition (25) so that almost the entire amount of the powder composition (25) added at once is transferred to the rice seeds. attached to. By repeating similar operations three times, 10.4 g of the powder composition (25) was attached to the rice seeds to form a coating layer. The total amount of water used for coating was 1.5 g. Thereafter, while maintaining the operation of the simple seed coating machine and rolling the rice seeds, 0.1 g of SORPOL5080 was added to the rice seeds and adhered to the outside of the coating layer. The rice seeds taken out from the simple seed coating machine were spread out on a stainless steel tray without overlapping and dried overnight to obtain the coated rice seeds (33) of the present invention.

Production example 34

Thirty-six grams (0.36 g) of Mowinyl6485 and 0.37 g of water were mixed to obtain 0.73 g of Mowinyl6485 water-dilution.

The following operations were performed according to the method described in Production Example 27. Using the powder composition (24) instead of 10 g of the powder composition (21) and 0.73 g of the above water-dilution of Mowinyl6485 instead of 0.55 g of the water-dilution of NALSTAR SR140, each composition or liquid was added in four portions. A coating layer was formed, and then 0.1 g of SORPOL5080 was attached to the outside of the coating layer to obtain the coated rice seed (34) of the present invention. The total amount of water used for coating was 1.7 g.

Production example 35

Seventy-point-zero (70.0) parts by weight of clothianidin and 30.0 parts by weight of SHOKOZAN CLAY S were mixed and pulverized with a centrifugal grinder to obtain powdered pesticide A. The average particle size of powdered pesticide A was 13.0 ㎛. Five grams (2.5 g) of zinc oxide heterogeneous, 7.5 g of iron oxide, and 0.086 g of powder pesticide A were mixed to obtain a powder composition (26).

Additionally, 0.41 g of NALSTAR SR140 and 0.50 g of water were mixed to obtain 0.91 g of NALSTAR SR140 water-dilution.

The following operations were performed according to the method described in Production Example 27. Using 10.086 g of the powder composition (26) instead of 10 g of the powder composition (21) and 0.91 g of the NALSTAR SR140 water-diluent instead of 0.55 g of the NALSTAR SR140 water-diluent, each composition or liquid was added in four portions to form a coating layer, and then 0.1 g of SORPOL5080 was attached to the outside of the coating layer to obtain coated rice seeds (35) of the present invention. The total amount of water used for coating was 1.3 g.

Production example 36

Zero point four grams (0.40 g) of SUPERFLEX500M and 0.76 g of water were mixed to obtain 1.2 g of SUPERFLEX500M water-diluent (hereinafter referred to as “diluent E”), and 0.04 g of SUPERFLEX500M and 1.13 g of water were mixed to obtain 1.17 g of SUPERFLEX500M water-diluted solution (hereinafter referred to as “diluted solution F”) was obtained.

The following operations were performed according to the method described in Production Example 27. Twenty grams (20 g) of dried rice seeds were soaked, a simple seed coating machine was operated to move and roll the rice seeds, and about 1/4 (about 0.3 g) of diluent E was added dropwise using a dropper, while adding 9 g of iron oxide. About 1/4 (about 2.3 g) of was added to the rice seeds to cause iron oxide to attach to the rice seeds. When the iron oxide adhered to the inner wall of the polyethylene cup 2, the iron oxide was scraped off using a spatula to cause almost the entire amount of the iron oxide added at once to adhere to the rice seeds. By repeating similar operations three times, 9 g of iron oxide was allowed to adhere to the rice seeds to form a first coating layer containing iron oxide (hereinafter referred to as “first coating layer”). The total amount of water used for coating was 0.8 g.

Thereafter, while maintaining the operation of the simple seed coating machine and rolling the rice seeds, about 1/4 (about 0.3 g) of diluent B was added dropwise using a dropper, while about 1/4 of 1 g of zinc oxide 3N5 was added dropwise. (about 0.25 g) was added to the rice seeds to attach zinc oxide to the outside of the first coating layer. When zinc oxide 3N5 adhered to the inner wall of the polyethylene cup 2, zinc oxide 3N5 was scraped off using a spatula to cause almost the entire amount of zinc oxide 3N5 added at once to adhere to the rice seeds. By repeating the similar operation three times, 1 g of zinc oxide 3N5 was attached to the outside of the first coating layer to form a second coating layer containing zinc oxide (hereinafter referred to as “second coating layer”) on the outside of the first coating layer. I ordered it. The total amount of water used for coating was 1.9 g.

Thereafter, while maintaining the operation of the simple seed coating machine and moving and rolling the rice seeds, 0.1 g of SORPOL5080 was added to the rice seeds and adhered to the outside of the second coating layer. The rice seeds taken out from the simple seed coating machine were spread on a stainless steel tray without overlapping and dried overnight to obtain the coated rice seeds (36) of the present invention.

Comparative Manufacturing Example 1

Ten grams (10 g) of DAE1K and 1 g of KTS-1 were mixed to obtain 11 g of iron mixture A.

The following operation was performed according to the method described in Production Example 1. Soak twenty grams (20 g) of dried rice seeds, operate the simple seed coating machine to move and roll the rice seeds, and spray water using a dropper while adding about 1/4 (about 2.8 g) of 11 g of iron mixture A. was added to the rice seeds to cause iron mixture A to attach to the rice seeds. When the iron mixture A adhered to the inner wall of the polyethylene cup 2, the iron mixture A was scraped off using a spatula to cause almost the entire amount of the iron mixture A added at once to adhere to the rice seeds. By repeating similar operations three times, 11 g of iron mixture A was attached to the rice seeds to form a coating layer. The total amount of water used for coating was 1.9 g. Thereafter, while maintaining the operation of the simple seed coating machine and moving and rolling the rice seeds, 0.5 g of KTS-1 was added to the rice seeds and adhered to the outside of the coating layer. The rice seeds taken out from the simple seed coating machine were spread out on a stainless steel tray without overlapping, and then the rice seeds were sprayed with water three times a day for 2 days to promote iron oxidation, followed by drying the rice seeds overnight for comparison. Coated rice seeds (I) were obtained.

Comparative Manufacturing Example 2

Five hundred grams (500 g) of DAE1K and 50 g of KTS-1 were mixed to obtain 550 g of iron mixture B.

About 5 L of water was poured into a polyethylene bucket, 1 kg of dried rice seeds (Koshihikari) were added thereto, and soaked at about 10°C for 2 nights. Thereafter, the rice seeds were taken out of the water and allowed to stand to remove excess moisture on the surface, and then the rice seeds were placed into the drum of a seed coating machine (KC-151, manufactured by KEIBUNSHA Manufacturing Co., Ltd.). The inclination angle (elevation angle) of the drum was adjusted to be 45 degrees. While operating the seed coating machine (drum rotation speed: 21.9 rpm) and moving and rolling the rice seeds, add about 1/4 (about 138 g) of 550 g of iron mixture B to the rice seeds while spraying water with a sprayer. Iron mixture B was attached to rice seeds. When the iron mixture B adhered to the inner wall of the drum, the iron mixture B was scraped off using a dust pan, so that almost the entire amount of the iron mixture B added at once adhered to the rice seeds. By repeating similar operations three times, 550 g of iron mixture B was attached to the rice seeds to form a coating layer. The total amount of water used for coating was about 100 g. Under the condition of moving and rolling the rice seeds while maintaining the operation of the seed coating machine, 25 g of KTS-1 was added to the rice seeds and adhered to the outside of the coating layer. The rice seeds taken out from the seed coating machine were spread out in a seedling box so as not to overlap, the rice seeds were sprayed with water 3 times a day for about 1 week to promote iron oxidation, and dried overnight to produce coated rice seeds (II) for comparison. got it

Next, a test example is shown.

Test example 1

Approximately 30 g of soil was filled in a plastic Petri dish and moistened with water, and then 50 coated rice seeds were sown on the surface of the soil. The Petri dish was left outdoors, and its condition was observed by photographing it with a time-lapse camera. The coated rice seeds remaining one day after sowing were counted, and the survival rate was then calculated using the following equation.

Residual rate (%) = Number of coated rice seeds remaining 1 day after sowing / 50 x 100

The results are shown in Table 1. In Table 1, the rice seeds (as a control) represent uncoated rice seeds, and the seed survival rate was 0% due to being eaten by birds such as sparrows.

[Table 1]

Test example 2

A water-soaked gauze was spread on a plastic Petri dish, and then 20 coated rice seeds were sown on the surface. The Petri dish was covered with a lid, and then left to stand in a thermostat set at 17°C. After 10 days, the presence or absence of seed germination was examined, and the germination rate was calculated using the following formula.

Germination rate (%) = Number of germinated seeds / 50 × 100

The results are shown in Table 2.

[Table 2]

Test example 3

A 12.9 m × 100 m rice field was plowed, irrigated, and then drained. One plot was limited to 0.9 m × 70 m, and then coated rice seeds were sown on the soil surface of the plot. Seeds were sown at a rate of 5 to 7 seeds per site at a distance of 30 cm between rows and 18 cm between roots.

After sowing the seeds, water was run through the rice fields. Thirteen days after sowing, the seedling rate was confirmed by examining the presence of seedlings in 90 randomly selected sowing locations. The parentage rate was calculated using the following formula.

Seedling rate (%) = Number of locations where seedlings exist / 90 × 100

The results are shown in Table 3.

[Table 3]

Test example 4

Ten coated rice seeds were placed in a Petri dish containing 50 mL of water (hardness: 3) and left to stand at room temperature (about 20°C). After 30 minutes, the presence or absence of delamination of the coating was checked by visual observation.

The results are shown in Table 4.

[Table 4]

Test Example 5

Approximately 30 g of soil was filled in a plastic Petri dish and moistened with water, and then 50 coated rice seeds were sown on the surface of the soil. The Petri dish was left outdoors, and its condition was observed by photographing it with a time-lapse camera. The coated rice seeds remaining one day after sowing were counted, and the survival rate was then calculated using the following equation.

Residual rate (%) = Number of coated rice seeds remaining 1 day after sowing / 50 × 100

The results are shown in Table 5. In Table 5, the rice seeds (as a control) represent uncoated rice seeds, and the seed survival rate was 0% due to being eaten by birds such as sparrows.

[Table 5]

Test example 6

A water-soaked gauze was spread on a plastic Petri dish, and then 20 coated rice seeds were sown on the surface. The Petri dish was covered with a lid, and then left to stand in a thermostat set at 17°C. After 10 days, the presence or absence of seed germination was examined, and the germination rate was calculated using the following equation.

Germination rate (%) = Number of germinated seeds / 50 × 100

The results are shown in Table 6.

[Table 6]

Test example 7

Ten coated rice seeds were placed in a Petri dish containing 50 mL of water (hardness: 3) and left to stand at room temperature (about 20°C). After 30 minutes, the presence or absence of delamination of the coating was checked by visual observation.

The results are shown in Table 7.

[Table 7]

1 shaft
2 polyethylene cups
3 mixer
4 stands

Claims (22)

A coated rice seed having a coating layer, wherein the coating layer contains zinc oxide, a surfactant, and at least one selected from the following group (A),
The average particle size of zinc oxide is in the range of 0.1 to 50 ㎛,
The weight ratio of at least one selected from the following group (A) to zinc oxide is in the range of 1:200 to 1:10,
Coated rice seeds, wherein the content of at least one species selected from the following group (A) in the coated rice seeds is in the range of 0.05 to 4% by weight;
Group (A): A group consisting of acrylic resin, vinyl acetate resin, urethane resin, and butadiene copolymer. A coated rice seed having a coating layer, wherein the coating layer contains zinc oxide and at least one member selected from the following group (A), and the surfactant is retained at least on the surface of the coated rice seed,
The average particle size of zinc oxide is in the range of 0.1 to 50 ㎛,
The weight ratio of at least one selected from the following group (A) to zinc oxide is in the range of 1:200 to 1:10,
Coated rice seeds, wherein the content of at least one species selected from the following group (A) in the coated rice seeds is in the range of 0.05 to 4% by weight;
Group (A): A group consisting of acrylic resin, vinyl acetate resin, urethane resin, and butadiene copolymer. The coated rice seed according to claim 1 or 2, wherein the coating layer contains at least one species selected from the following group (B);
Group (B): A group consisting of titanium oxide, magnesium oxide, clay, zeolite, barium sulfate, and calcium carbonate. The coated rice seed according to claim 3, wherein the coating layer has a first layer containing at least one species selected from group (B), and a second layer containing zinc oxide coated on the outside of the first layer. Coated rice seeds according to claim 1 or 2, wherein the coating layer further contains iron oxide. The coated rice seed according to claim 5, wherein the coating layer has a first layer containing iron oxide and a second layer containing zinc oxide coated on the outside of the first layer. A method for producing coated rice seeds, comprising the following steps:
The average particle size of zinc oxide is in the range of 0.1 to 50 ㎛,
Method for producing coated rice seeds, wherein the content of at least one species selected from the following group (A) in the coated rice seeds is in the range of 0.05 to 4% by weight:
(1) Adding zinc oxide and at least one aqueous dispersion selected from the group (A) below while moving and rolling the rice seeds to form a coating layer containing zinc oxide and at least one member selected from the group (A) below wherein the weight ratio of at least one selected from the following group (A) to zinc oxide is in the range of 1:200 to 1:10,
(2) adding a surfactant while moving and rolling the seed obtained in step (1) to retain the surfactant on the outside of the layer formed by step (1), and
(3) drying the seeds obtained in step (2);
Group (A): A group consisting of acrylic resin, vinyl acetate resin, urethane resin, and butadiene copolymer. A method for producing coated rice seeds, comprising the following steps:
The average particle size of zinc oxide is in the range of 0.1 to 50 ㎛,
Method for producing coated rice seeds, wherein the content of at least one species selected from the following group (A) in the coated rice seeds is in the range of 0.05 to 4% by weight:
(1) While moving and rolling the rice seeds, add at least one type selected from the group (B) below, zinc oxide, and an aqueous dispersion of at least one type selected from the group (A) below, and add at least one type selected from the group (A) below. A step of forming a coating layer containing one type, at least one type selected from the following group (B), and zinc oxide, wherein the weight ratio of at least one type selected from the following group (A) to zinc oxide is 1:200 to 1. :10 steps in the range,
(2) adding a surfactant while moving and rolling the seed obtained in step (1) to retain the surfactant on the outside of the layer formed by step (1), and
(3) drying the seeds obtained in step (2);
Group (A): a group consisting of acrylic resin, vinyl acetate resin, urethane resin, and butadiene copolymer, and
Group (B): A group consisting of titanium oxide, magnesium oxide, clay, zeolite, barium sulfate, and calcium carbonate. A method for producing coated rice seeds, comprising the following steps:
The average particle size of zinc oxide is in the range of 0.1 to 50 ㎛,
Method for producing coated rice seeds, wherein the content of at least one species selected from the following group (A) in the coated rice seeds is in the range of 0.05 to 4% by weight:
(1) (I) While moving and rolling the rice seeds, add at least one aqueous dispersion selected from the following group (B) and at least one type selected from the following group (A) to at least one selected from the following group (A) forming a coating layer containing at least one species selected from the species and group (B) below, and (II) moving and rolling the seed obtained in step (I) zinc oxide and at least one species selected from group (A) below Adding an aqueous dispersion of to form a coating layer containing at least one selected from the group (A) below and zinc oxide on the outside of the layer formed in step (I), wherein at least one selected from the group (A) below a step where the weight ratio of species 1 to zinc oxide is in the range of 1:200 to 1:10,
(2) adding a surfactant while moving and rolling the seed obtained in step (1) to retain the surfactant on the outside of the layer formed by step (1), and
(3) drying the seeds obtained in step (2);
Group (A): A group consisting of acrylic resin, vinyl acetate resin, urethane resin, and butadiene copolymer,
Group (B): A group consisting of titanium oxide, magnesium oxide, clay, zeolite, barium sulfate, and calcium carbonate. A method for producing coated rice seeds, comprising the following steps:
The average particle size of zinc oxide is in the range of 0.1 to 50 ㎛,
Method for producing coated rice seeds, wherein the content of at least one species selected from the following group (A) in the coated rice seeds is in the range of 0.05 to 4% by weight:
(1) While moving and rolling the rice seeds, add zinc oxide, iron oxide, and at least one aqueous dispersion selected from the group (A) below to add at least one type selected from the group (A) below, zinc oxide, and iron oxide. A step of forming a coating layer containing, wherein the weight ratio of at least one member selected from the following group (A) to zinc oxide is in the range of 1:200 to 1:10,
(2) adding a surfactant while moving and rolling the seed obtained in step (1) to retain the surfactant on the outside of the layer formed by step (1), and
(3) drying the seeds obtained in step (2);
Group (A): A group consisting of acrylic resin, vinyl acetate resin, urethane resin, and butadiene copolymer. A method for producing coated rice seeds, comprising the following steps:
The average particle size of zinc oxide is in the range of 0.1 to 50 ㎛,
Method for producing coated rice seeds, wherein the content of at least one species selected from the following group (A) in the coated rice seeds is in the range of 0.05 to 4% by weight:
(1) (i) Add iron oxide and at least one aqueous dispersion selected from the group (A) below while moving and rolling the rice seeds to form a coating layer containing at least one member selected from the group (A) below and iron oxide. forming, and (ii) adding zinc oxide and at least one aqueous dispersion selected from the group (A) below while moving and rolling the seeds obtained in step (i) to the outside of the layer formed by step (i). Forming a coating layer containing at least one member selected from group (A) and zinc oxide, wherein the weight ratio of at least one member selected from group (A) to zinc oxide is in the range of 1:200 to 1:10. steps,
(2) adding a surfactant while moving and rolling the seed obtained in step (1) to retain the surfactant on the outside of the layer formed by step (1), and
(3) drying the seeds obtained in step (2);
Group (A): A group consisting of acrylic resin, vinyl acetate resin, urethane resin, and butadiene copolymer. Coated rice seeds produced by the method for producing coated rice seeds according to any one of claims 7 to 11. delete delete delete delete delete delete delete delete delete delete