JPWO2017082283A1 - Paddy rice seed meal, method for producing the same, and paddy rice seed meal coating composition - Google Patents

Abstract

The present invention relates to paddy rice seed meal comprising at least one powder selected from metal oxides (brown iron oxide, zinc oxide, and tin oxide); a resin mixed with a powder containing metal oxide and paddy rice seed meal A method of producing a coated paddy rice seed cake which is sprayed with an emulsion to form a coating layer containing a metal oxide powder and a resin emulsion on the seed pad surface and then dried; an emulsion paste comprising a paddy rice seed cake and a resin containing the metal oxide powder; A method for producing coated paddy rice seed cake that is dried after forming a coating layer containing a metal oxide powder and a resin emulsion on the surface of the seed cake; and for paddy rice seed coating containing the metal oxide powder and the resin emulsion Relates to the composition. ADVANTAGE OF THE INVENTION According to this invention, the degradation of the paddy rice seed bran by the heat_generation | fever which generate | occur | produces at the time of a coating process and a post process is essentially eliminated, the covering work efficiency improves and it is hard to receive a bird damage, its manufacturing method, and paddy rice A seed coating composition can be provided.

Description

  The present invention relates to paddy rice seed meal (hereinafter referred to as “coated paddy rice seed meal”) to which powder suitable for direct sowing cultivation is attached. More specifically, brown rice oxide powder, zinc oxide powder, and / or tin oxide powder adheres without seeding until it germinates after sowing and is less susceptible to bird damage, its production method, and rice seed cake The present invention relates to a coating composition.

Rice is one of the three largest crops in the world, and rice is an important crop with the largest cropping area in Japan. The current rice farming in Japan is generally rice planting, which is a method of transplanting seedlings grown in the seedling raising process to a field. Here, 30% of the rice production cost is considered as seedling raising cost, and its reduction is strongly desired. In addition, the aging of paddy rice producers is progressing, and labor-saving paddy rice cultivation technology is also required.
Thus, from the viewpoint of realizing cost reduction and labor saving of rice cultivation, a direct sowing method for directly sowing paddy rice seed pods in a flooded field has attracted attention.
In the direct sowing cultivation method, in recent years, a method (Patent Document 1) in which seed pods are covered with a mixed powder of iron powder and calcined gypsum so as not to float on the water of rice fields has been proposed, and hence the common name “iron coating”. A guidebook (Non-Patent Document 1) has been issued, and many paddy rice producers try to introduce it. In addition, the spread activity by the website (Non-Patent Document 2) is also thriving.

The seed coat | covering operation | work by iron coating is performed by charging a rolling granulator with the seed potato and the mixture of reduced iron powder and calcined gypsum, and spraying water. Inside the device, iron powder adhering to the surface of the seed vat is oxidized by oxygen in the air, and the rust generated and grows with heat plays a role as a binder, and iron powder and calcined gypsum gradually powder on the surface of the seed vat. The phenomenon is happening.
In iron coating, it has been pointed out as a major problem from the beginning that seed pods deteriorate due to the heat generated by the occurrence of rust, resulting in a decrease in germination rate and a significant deterioration in rice production efficiency.

  In addition, in order to suppress the accumulation of heat inside the coating layer, which causes deterioration of the seed pods due to heat generation even after the dressing, immediately after the dressing work, the seed pods in the device are raised in seedling boxes or vinyl sheets on the floor. A post-process that spreads the film thinly and dissipates heat is necessary.

Furthermore, in order to promote the oxidation of under-oxidized iron powder, a post-process for spraying water on the surface of the dressed soot is also essential while paying attention to rapid heat generation for several days after the dressing operation. The work efficiency is very poor and the load is large.
In this method, the end point of coating work (oxidation of iron powder) is judged by visual inspection at the stage when the coating seeds become reddish brown, but actually, even in this state, oxidation of the coated iron powder is performed. Has not reached the end point completely (the coated seed pod itself reacts with the magnet), and oxidation with fever starts again in the storage environment after production and in the field after sowing, which may further worsen the deterioration of the seed pod. Has also been pointed out.

Therefore, coating with a mixture of iron oxide (III) (Fe ₂ O ₃ ), which is one of iron oxides, and a resin has been proposed (Patent Document 2), but it has a problem that the coating tends to collapse in water. ing. Moreover, since Fe ₂ O ₃ is used as a red pigment (Bengara), the seed pod coated with Fe ₂ O ₃ has a disadvantage that it is susceptible to bird damage because it differs from the color of the field.

Japanese Patent No. 44441645 JP-A-2015-77100

Paddy rice coating direct sowing cultivation guide ver. 5, 2014 Kubota Corporation Tekoko classroom, Kubota Corporation (www.jnouki.kubota.co.jp/jnouki/html/agriculture_info/tetsuko/)

  In view of the problems of the above-described conventional iron coating technology, the problem of the present invention is that the degradation of paddy rice seeds due to heat generated during the coating process and the subsequent process is essentially eliminated, and the coating work efficiency is improved, It is another object of the present invention to provide a coated paddy rice seed pod that is less susceptible to bird damage, a method for producing the same, and a composition for coating paddy rice seed pod.

  As a result of intensive studies, the present inventors have found that the above problems can be solved by coating paddy rice seed meal with a resin containing powder of brown iron oxide, particularly iron oxide mineral (limonite) produced in nature. Furthermore, the present invention was completed by confirming that zinc oxide and tin oxide can be used in the same manner as limonite.

That is, the present invention provides paddy rice seed meal having the following coating layers [1] to [10], a method for producing paddy rice seed meal having the coating layers [11] to [12], and [13] to [16]. A composition for coating paddy rice seed meal is provided.
[1] A paddy rice seed cake having a coating layer, wherein the coating layer contains at least one powder (a) and resin (b) selected from brown iron oxide, zinc oxide, and tin oxide.
[2] The paddy rice seed meal according to item 1, wherein the coating layer is brown.
[3] The paddy rice seed meal according to item 1 or 2, wherein the brown iron oxide is limonite.
[4] The paddy rice seed meal according to any one of items 1 to 3, wherein the brown iron oxide contains goethite.
[5] The paddy rice seed meal according to any one of the preceding items 1 to 4, comprising 10 to 50% by mass of the powder (a) with respect to the rice seed meal having a resin coating layer.
[6] The paddy rice seed meal according to any one of 1 to 5 above, which comprises 70 to 99% by mass of the powder (a) with respect to the resin coating layer.
[7] The paddy rice seed meal according to any one of 1 to 6 above, wherein the average particle size of the powder (a) is in the range of 30 to 100 μm.
[8] The paddy rice seed meal according to any one of 1 to 7 above, further comprising a fertilizer component (c) in the resin coating layer.
[9] The resin (b) is selected from the group consisting of a vinyl acetate polymer resin, an acrylate copolymer resin, an ethylene / vinyl acetate / acrylic acid copolymer resin, and an ethylene / vinyl acetate copolymer resin. 9. The paddy rice seed meal according to any one of 1 to 8 above, which contains one or more resins.
[10] The paddy rice seed meal according to any one of 1 to 9 above, wherein the resin (b) contains a biodegradable resin.
[11] A surface of the seed pod by spraying a composition containing the resin (b) onto a mixture of at least one powder (a) selected from brown iron oxide, zinc oxide, and tin oxide and the rice seed pod A method for producing paddy rice seed meal having a resin coating layer containing powder, wherein a coating layer containing powder and resin is formed on the substrate, followed by drying.
[12] A paddy rice seed meal and a paste-like composition containing the powder (a) and the resin (b) are mixed to form a coating layer containing the powder and resin on the seed rice surface, and then dried. A method for producing a rice seed bran having a resin coating layer containing powder.
[13] A composition for coating rice paddy rice seed comprising a composition containing the resin (b) and at least one powder (a) selected from brown iron oxide, zinc oxide, and tin oxide .
[14] The composition for coating paddy rice seed meal according to item 13 above, wherein the composition containing the resin (b) is a resin emulsion.
[15] The resin emulsion is a vinyl acetate polymer aqueous emulsion, an acrylic ester copolymer aqueous emulsion, an ethylene / vinyl acetate / acrylic acid copolymer aqueous emulsion, an ethylene / vinyl acetate copolymer aqueous emulsion, and a biodegradation. 15. The paddy rice seed meal coating composition according to 14 above, which is one or more resin emulsions selected from the group consisting of water-based aqueous resin emulsions.
[16] The paddy rice seed meal coating composition according to any one of items 13 to 15, wherein the brown iron oxide is limonite.

The paddy rice seed cake of the present invention having a resin coating layer containing a metal oxide powder selected from brown iron oxide, zinc oxide, and tin oxide is a conventional paddy rice seed cake coated with a mixed powder of iron powder and calcined gypsum. Deterioration to paddy rice seed bran due to heat generated during the coating process and the subsequent process, which was a problem in the above, is essentially eliminated, and a metal oxide-containing resin-coated paddy rice seed bran can be produced with high work efficiency. In addition, by using a resin composition containing brown iron oxide (limonite) in a specific particle size range, disintegration in water is suppressed, and iron oxide (III) (Fe ₂ O ₃ ) depends on the main powder. There is an advantage that it is less susceptible to bird damage because it is closer to the field color than the covering.

4 is a photograph of the paste-like paddy rice seed coat coating composition produced in Preparation Example 2. 4 is a photograph of the coated paddy rice seed pod (α) produced in Example 2. FIG.

  In the present invention, a coating layer containing at least one powder selected from brown iron oxide, zinc oxide, and tin oxide (hereinafter sometimes abbreviated as metal oxide powder) and a resin. Cover the surface of paddy rice seed.

[Powder (a)]
In the present invention, examples of the powder used for the coating layer include brown iron oxide, zinc oxide, and tin oxide. These may be used alone or in combination.
For these combinations, the type of metal oxide to be used and the blending ratio may be appropriately set according to the required characteristics. Examples of the zinc oxide include ZnO, and examples of the tin oxide include SnO (divalent) and SnO ₂ (tetravalent). In addition, zinc oxide and tin oxide are generally white, and when used as a simple substance, a colorant (g) close to the field color, for example, brown, brown, or black, is included in the coating resin to prevent bird damage. It is preferable. Among these metal oxides, brown iron oxide is preferable in that it is close to the color of the field without mixing colorants. The brown iron oxide is preferably contained in an amount of 80% by mass or more based on the powder (a), more preferably 90% by mass or more, and further preferably 99% by mass or more. It is preferable to contain 80% by mass or more of brown iron oxide with respect to the powder because the amount of the colorant can be reduced.

Examples of brown iron oxide include ferrous oxide (FeO), triiron tetroxide (Fe ₃ O ₄ ), α-iron oxyhydroxide (α-FeOOH), and γ-iron oxyhydroxide (γ-FeOOH). Examples of the mineral containing brown iron oxide include wustite, magnetite (ferrite), goethite (goethite), spheroite (repidocrocite), and limonite (limonite). Limonite is a common name for iron oxide minerals and refers mainly to one or both aggregates of goethite and sphalerite. Limonite is particularly preferable from the viewpoint of stability and production cost.

The limonite used in the present invention preferably has a goethite content of 10% by mass or more, more preferably 15% by mass or more, and still more preferably 20% by mass or more. When the content of goethite is 20% by mass or more, a brown color is exhibited. In addition, about the inclusion of goethite, for example, in X-ray diffraction (XRD), it can be analyzed under the conditions of an X-ray source CuKα, an output 45 kV-40 mA, a scanning area (2θ) of 10 to 90 deg.
Limonite may be a natural product produced from an iron mine as it is, but may be used after aging, such as outdoor exposure after production, and after pulverization and classification.

  Known as open-air limonite mines in Japan are the Kashihara Mine (Shinanomachi, Kamimizunai-gun, Nagano Prefecture) and Daiichi Aso Mine (Aso-cho, Aso-gun, Kumamoto Prefecture). Limonite mined by the company Nippon Limonite is manufactured and sold after several years of aging, such as outdoor exposure, and then processed by crushing, ball-throwing, etc. It can also be used as a powder containing iron.

In the present invention, Fe ₂ O ₃ (iron oxide (III)), α-Fe ₂ O ₃ (α-iron oxide (III)), β-Fe _{2 is used as long as} the brown color of the powder (a) is not impaired. O ₃ (β-iron oxide (III)), γ-Fe ₂ O ₃ (γ-iron oxide (III)), ε-Fe ₂ O ₃ (ε-iron oxide (III)), β-FeOOH (β- Iron oxide such as iron oxyhydroxide), δ-FeOOH (δ-iron oxyhydroxide), Fe (OH) ₂ (iron hydroxide (II)), Fe (OH) ₃ iron hydroxide (III), and other It may contain powder.

  The particle size of the powder (a) cannot be defined unconditionally because of its bulk specific gravity, but the particle size is preferably in the range of 30 to 100 μm, more preferably 30 to 80 μm, and even more preferably 30 to 75 μm. If the particle size is 30 μm or more, the bulk specific gravity is large, so that the volume of the coating layer required is small and the work efficiency is improved. When the thickness is 100 μm or less, the coating layer is hardly disintegrated in water and peeled off from the surface. The average particle diameter referred to here is a volume cumulative particle diameter D50 measured by a laser diffraction / scattering particle size distribution measuring apparatus.

The powder (a) in the coated paddy rice seed bran of the present invention preferably contains 10 to 50 parts by weight, more preferably 20 to 45 parts by weight, based on 100 parts by weight of the paddy rice seed bran having the resin coating layer. Preferably it is 25-40 mass parts. When the content ratio is 10 parts by mass or more, the apparent specific gravity increases and it becomes difficult to flow after sowing, and when it is 50 parts by mass or less, the coating layer is easily maintained.
Moreover, 70-99 mass parts is preferable with respect to 100 mass parts of resin coating layers, and, as for the ratio of the said powder (a) in a resin coating layer, More preferably, it is 80-99 mass parts, More preferably, 90- 99 parts by mass. If it is 70 parts by mass or more, it is possible to effectively prevent the soot from floating, and if it is 99 parts by mass or less, the strength of the coating layer can be maintained.

[Resin (b)]
Although the kind of resin used for a coating layer in this invention is not specifically limited, From a viewpoint of coating strength, using as an emulsion is preferable. A water-based resin emulsion in which the dispersion medium is water is more preferable from the viewpoints of reducing deterioration of seed pods and environmental burden. Examples of the resin used in the aqueous emulsion include vinyl polymer, acrylic polymer, diene polymer, vinyl monomer, at least two copolymers of acrylic monomer and diene monomer, urethane polymer, biodegradable polymer, and the like. These can also be used as a mixture.
Water-based resin emulsions include vinyl acetate polymer aqueous emulsion, acrylic ester copolymer aqueous emulsion, ethylene / vinyl acetate / acrylic acid copolymer aqueous emulsion, ethylene / vinyl acetate copolymer aqueous emulsion, and biodegradable Resin emulsions are preferred.

Among these, from the viewpoint of environmental load, an ethylene / vinyl acetate copolymer aqueous emulsion and a biodegradable resin emulsion can be more preferably used.
Examples of the product containing the resin emulsion used in the present invention include the Polysol (registered trademark) series (vinyl acetate polymer aqueous emulsion, acrylate copolymer aqueous emulsion, ethylene / vinyl acetate copolymer provided by Showa Denko KK). Polymer aqueous emulsion and ethylene / vinyl acetate / acrylic acid copolymer aqueous emulsion).
Examples of the biodegradable resin include Randy PL series (polylactic acid resin emulsion) manufactured by Miyoshi Yuka Co., Ltd.

  When the resin (b) is mixed with the powder (a) and then coated on the seeds, the solid content concentration of the emulsion of the resin (b) is preferably 10 to 85% by mass because the handling is easy. Preferably it is 25-70 mass parts, More preferably, it is 40-60 mass parts. On the other hand, when the resin (b) is sprayed onto the mixture of the powder (a) and the paddy rice seed meal, the solid content concentration of the emulsion is preferably 1 to 10% by mass because it is easy to handle, and more preferably 2 It is -7 mass parts, More preferably, it is 3-6 mass parts.

  Moreover, the ratio of the resin (b) in the resin coating layer is preferably 0.1 to 43 parts by mass, more preferably 0.5 to 25 parts by mass with respect to 100 parts by mass of the powder (c). More preferably, it is 1-10 mass parts. If the amount is 0.1 parts by mass or more, the seed can be effectively coated with the seed, and if it is 43 parts by mass or less, the workability at the time of coating is good.

[Fertilizer component (c)]
In this invention, you may add a fertilizer component (c) to a coating layer as needed. Examples of the fertilizer component (c) include KH ₂ PO ₄ (potassium dihydrogen phosphate), K ₂ HPO ₄ (dipotassium hydrogen phosphate), K ₃ PO ₄ (tripotassium phosphate), K ₄ P ₂ O _7. (Tetrapotassium pyrophosphate), K ₅ P ₃ O ₁₀ (potassium tripolyphosphate), potassium phosphate salts such as (KPO ₃ ) _n (potassium metaphosphate, n = 10,000), and MoO ₃ (molybdenum oxide ( VI)), adenosine, guanosine, thymidine, cytidine, uridine, xanthosine, and inosine, and their 2′-deoxy forms, and nucleotides include adenylate (adenosine-5′-phosphate), guanylate ( Guanosine-5′-phosphate), thymidyl acid (thymidine-5′-phosphate), uridylic acid (uridine-5′-phosphate), xanthylic acid (xanthosine-5′-phosphate) ), And inosinic acid (inosine-5'-phosphate), and nucleosides such as these 2'-deoxy body, nucleotides, such as uric acid and inosine and the like. Nucleosides and nucleotides may be free forms or salts such as sodium salts and potassium salts. Among these, food additives (KPO ₃ ) n (potassium metaphosphate, n = 10,000), MoO ₃ (molybdenum oxide (VI)), inosine, and inosine acid (inosine-5′-phosphate) are preferred. One or more selected. These can be used alone or in plural.

  The fertilizer component (c) is preferably 0.01 to 10 parts by weight, more preferably 0.05 to 7.5 parts by weight, and still more preferably 0.1 to 5 parts by weight with respect to 100 parts by weight of the powder (a). Part. If it is 0.01 mass part or more, an effect will be acquired at the time of growth, and if it is 10 mass parts or less, it is favorable in terms of productivity or cost.

[Thickener (d)]
A general thickener (d) can be used in the coating layer as needed. By using a thickener, it is possible to coat the paddy rice seed meal in a uniform state without separating the paste.

  Examples of thickeners include cellulose compounds such as hydroxyethyl cellulose, hydroxypropyl cellulose, and glycols such as polyethylene glycol distearate, polyacrylic acid sodium salt, and guar gum, xanthan gum, and mixtures thereof. Among them, hydroxypropylcellulose, guar gum, xanthan gum, and mixtures thereof known as food additives can be preferably used.

  It is preferable to use 0-5 mass parts of thickeners with respect to 100 mass parts of powder (a), More preferably, it is 0-3 mass parts, More preferably, it is 0-1 mass part. If a thickener is 5 mass parts or less, it has favorable handleability.

[Dispersant (e)]
A general dispersant (e) can be used in combination with the coating layer as necessary. By mixing the dispersant with the powder (a) and the resin (b) and then coating the paddy rice seed meal, wetting and dispersibility of the powder surface can be improved. As the surfactant used as the dispersant, various known surfactants can be selected and used according to the surface state of the powder particles to be used. Specifically, polycarboxylic acids such as Demol (registered trademark) EP, Homogenol (registered trademark) L-18, Poise (registered trademark) 520, and 530 (above, manufactured by Kao Corporation) as an anionic surfactant. Type surfactants and naphthalene sulfonic acid formalin condensate type surfactants such as Demol (registered trademark) N (manufactured by Kao Corporation), and nonionic surfactants include Surfynol (registered trademark) TG, Acetylene glycol type activator such as 104E (manufactured by Nissin Chemical Industry Co., Ltd.), Emulgen (registered trademark) 102KG, 103, 104P, 105, 106, 108, 109P, 120, Polyoxyethylene lauryl ether such as 123P, 130K, 147, 150 (above, manufactured by Kao Corporation), Emma Polyoxyethylene cetyl ethers such as Gen (registered trademark) 210P and 220 (above, manufactured by Kao Corporation), and polyoxyethylene cetyl ethers such as Emulgen (registered trademark) 306P, 320P, and 350 (above, manufactured by Kao Corporation) Polyethyleneethylene oleyl ether such as ethylene stearyl ether, Emulgen (registered trademark) 404, 408, 409V, 420, and 430 (above, manufactured by Kao Corporation), Pegnol (registered trademark) O-6A (Toho) Chemical Industry Co., Ltd.), fatty acid esters such as Tyrabazole (registered trademark) L-01 (manufactured by Taiyo Kagaku Co., Ltd.), and polyoxyethylene alkyl ether types such as Neugen (registered trademark) ET (Daiichi Kogyo Seiyaku Co., Ltd.) Surfactant, Nonal 210, 212 (above trade name, manufactured by Toho Chemical Industry Co., Ltd.) Such as polyoxyethylene alkyl phenyl ether type surface active agents. These can be used alone or in combination.

  The amount of the dispersant (e) used is, for example, 0 when the powder (a) and the resin (b) are mixed in advance to form a paste and then coated on paddy rice seed meal with respect to 100 parts by mass of the powder (a). It is preferable to add 0.01-30 mass parts, More preferably, it is 0.1-15 mass parts, More preferably, it is 1-10 mass parts. If a dispersing agent is 30 mass parts or less, the influence on the disintegration property of a coating layer is small.

[Foam suppressant (f)]
A general foam inhibitor (f) can be used in the coating layer as needed. By previously mixing the foam suppressant with the powder (a) and the resin (b) and then coating the paddy rice seed meal, the workability during coating can be improved.
Antifoaming agents include Nopco (registered trademark) 8034, Nopco (registered trademark) 8034-L, SN deformer 477, SN deformer 5013, SN deformer 247, SN deformer 382 (above trade names, manufactured by San Nopco Co., Ltd.), Anti Home 08 (trade name), Emulgen (registered trademark) 903 (above, manufactured by Kao Corporation), Awabreak G-109, SO-101, L-01, LJ-01, H-01 (above, Taiyo Kagaku) Commercially available products such as those manufactured by Co., Ltd. can be used.

  The amount of the foam suppressor used is preferably 0.01 to 3% by mass, more preferably 0.05 to 2 parts by mass, and still more preferably 0. 0 to 1% by mass with respect to 100 parts by mass of the powder (a). 1 to 1 part by mass. If the amount of the foam suppressor is 0.01 parts by mass or more, a good foam suppressing effect is obtained, and if it is 3 parts by mass or less, the influence on the disintegration property of the coating layer is small.

[Colorant (g)]
When zinc oxide powder and tin oxide powder are used as the metal oxide powder, it is preferable to use a colorant for bringing the color of the resin coating layer close to the color of the field. Examples of the colorant include TS brown / KR2.
The colorant is preferably added in an amount of 0.05 to 1 part by weight, more preferably 0.05 to 0.7 parts by weight, and still more preferably 0.1 to 0.6 parts by weight with respect to 100 parts by weight of the powder. Part. If the colorant is 1 part by mass or less, it becomes close to the color of the soil.

[Method for producing powder-containing resin coating layer]
The method for producing paddy rice seed meal having a resin coating layer containing metal oxide powder according to the present invention is not particularly limited as long as the powder (a) and the resin (b) can cover the surface of the rice seed seed meal. For example, there are the following methods (1) and (2).

Method (1): A coating layer containing the powder (a) and the resin (b) on the surface of the seed pod by spraying the composition (i) containing the resin (b) onto the mixture of the powder (a) and the rice seed pod. Then, the resin dispersion medium is dried.
Method (2): Coating of paddy rice seed meal with paste-like composition (II) containing the above powder (a) and resin (b) and containing the powder (a) and resin (b) on the surface of the seed meal After forming the layer, the resin dispersion medium is dried.

  In any method, the dispersion medium of the composition containing the resin (b) can contain an organic solvent miscible with water. It is preferable to use alcohols such as methanol, ethanol, normal propyl alcohol, and isopropyl alcohol in combination from the viewpoint of shortening the drying time of the coating of the final seed surface or sterilizing the composition. From the viewpoint, ethanol can be used more preferably. The organic solvent miscible with water is preferably used in an amount of 50 parts by mass or less, more preferably 20 parts by mass or less, and still more preferably 10 parts by mass or less with respect to the entire dispersion medium. By setting the organic solvent to 50 parts by mass or less, it is possible to obtain a composition excellent in workability and hygiene with a low environmental load.

In the case of producing a paddy rice seed meal having a resin coating layer by the method (1), the composition (i) containing the resin (b) is sprayed on the mixture of the powder (a) and the rice seed seed meal and then dried. The spraying method and the drying method are not limited.
For example, a seed granule and powder (a) are loaded into an apparatus such as a rolling granulator, and a mixture thereof is prepared by rotating, and the composition (i) containing the resin (b) is sprayed on the mixture. There is a way. As a spraying method, it can be carried out manually using a sprayer or the like, or a machine such as a mist spraying device can be used.

The composition (i) used in the method (1) includes, in addition to the powder (a) and the resin (b), fertilizer components, thickeners as described above (c) to (g), if necessary. Dispersants, foam inhibitors, colorant materials and other additives may be included.
The viscosity of the composition (i) in Method 1 is preferably 1 to 5 mPa · s, more preferably 1 to 3, and further preferably 1 to 1.5. If the viscosity of the composition is 1 to 5 mPa · s, it is suitable for spraying.

  When preparing a paste-like paddy rice seed meal coating composition (II) using the powder (a) used in the method (2) as a filler, the powder (a), the resin (b) and other additives are used. The mixing method and the order of adding the materials are not limited as long as they can be uniformly dispersed.

  For example, a paste is prepared by stirring and mixing all materials at once, or a mill base is prepared in advance by stirring and mixing materials other than the resin (b), and the resin (b) is added to the mill base and further added. A method of stirring and mixing can be used. There is no restriction | limiting in particular in the combination of the material at the time of producing a mill base, All the materials should just be contained in the final paste. In the present invention, a method of preparing a mill base in advance is preferable because the dispersibility of the resin (b) is improved and the production efficiency is improved.

In the case of producing paddy rice seed meal having a resin coating layer using the paste-like composition (II), it is sufficient that the composition (II) can be dried after being applied to the seed meal, and the application method and the drying method are not limited.
For example, after loading seed pods into a rolling granulator, etc., adding composition (II) while rotating, applying composition (II) to the seed pods, and then drying on a stainless steel vat all day and night A coating layer can be formed.

  In the case of the method (2), the viscosity of the composition (i) is preferably 5,000 to 30,000 mPa · s, more preferably 6,000 to 28,000, and further preferably 6,000 to 6,000. 25,000. If the viscosity of the composition is 5,000 to 30,000 mPa · s, it is suitable for handling as a paste.

In addition, the drying in the methods 1 and 2 aims at raising the hardness of the resin coating layer which adheres to the seed soot by evaporating the dispersion medium of the resin (b) contained in the composition.
The hardness of the coating layer is preferably 50 to 200N. If it is 50 N or more, it is difficult to receive bird damage, and if it is 200 N or less, the germination rate is good. The hardness of the coating layer is a value measured for each seed soot on which the coating layer is formed, and a hardness meter HH-411 manufactured by Mitutoyo Corporation can be used as the measuring instrument.

  EXAMPLES Hereinafter, although an Example, a comparative example, and a reference example are given and this invention is demonstrated further more concretely, this invention is not limited to these.

[Pretreatment of paddy rice seed meal]
The paddy rice seed pods used in the examples and comparative examples were used after the following pretreatment by the conventional agricultural technique.
After sowing seeds (variety: Milky Queen, produced in Toyama Prefecture in 2014) purchased from Uken, Inc. with salt water adjusted to a specific gravity of 1.13 using a salt water seed meter (manufactured by Sato Keiki Seisakusho Co., Ltd.) It was immersed in water adjusted to 15 ° C. and held for 5 days. After taking out from water, it was air-dried in a room kept at 25 ° C. for 24 hours to obtain a pretreated seed pod.

Synthesis Example 1: Synthesis of iron oxide A Iron nitrate (III) nonahydrate (manufactured by Kanto Chemical Co., Ltd.) 92.2 g (0) in a 3 L container made of tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer (hereinafter referred to as PFA) .228 mol) and 4.2 g (0.031 mol) of potassium dihydrogen phosphate (manufactured by Kanto Chemical Co., Inc.) were weighed and dissolved in 600 ml of ion-exchanged water. Thereto was added 17.2 g of a 23% aqueous solution of sodium silicate (manufactured by Kanto Chemical Co., Inc.), and after stirring for 3 hours at room temperature, 55.9 g of 28% aqueous ammonia (manufactured by Kanto Chemical Co., Ltd.) was added, and further 2 hours. Stirring was continued. Thereto, 134.5 g of a GA 1600L (manufactured by Mitsubishi Rayon Co., Ltd.) 0.1% aqueous solution was added as an aggregation precipitant to form a reddish brown aggregate, and the iron oxide precursor was recovered by suction filtration. The recovered precursor was placed on a magnetic dish and heat-treated at 350 ° C. for 3 hours in a muffle furnace under the atmosphere to obtain 23.3 g of iron oxide. The obtained iron oxide is charged into an alumina pot together with 3 mm alumina balls of the same volume, treated for 3 hours on a ball mill apparatus at a rotation speed of 120 rpm, and then screened to be collected in a tray connected under a sieve using a 100 μm mesh. The iron oxide A powder was obtained.

Preparation Example 1: Preparation of Iron Oxide Paste 20. A 30 ml polyethylene container was weighed with 20.03 g of a 2% aqueous solution of Celny (registered trademark) H (manufactured by Nippon Soda Co., Ltd.), which is hydroxypropylcellulose. There, 1.02 g of Demol (registered trademark) EP (manufactured by Kao Corporation), 0.81 g of Emulgen (registered trademark) 108 (manufactured by Kao Corporation), Nopco (registered trademark) 8034-L (manufactured by San Nopco Corporation) After adding 31 g, the mixture was stirred and mixed using a rotation and revolution type stirring device. An iron / vinyl acetate copolymer aqueous resin emulsion is added to a mill base prepared by adding 60.0 g of the iron oxide A powder synthesized in Synthesis Example 1 and stirring and mixing it using a rotation and revolution type stirring device. Paste A was obtained by adding 3.5 g of Lonefix eco # 700 (manufactured by Showa Denko KK, solid concentration 50%) and stirring and mixing using a rotation and revolution type stirring device.

Preparation Example 2: Preparation of Limonite Paste B In a 150 mL polyethylene container, 20.12 g of a 2% aqueous solution of Celny (registered trademark) H (manufactured by Nippon Soda Co., Ltd.), which is hydroxypropylcellulose, was weighed. There, 1.03 g of Demol (registered trademark) EP (manufactured by Kao Corporation), 0.80 g of Emulgen (registered trademark) 108 (manufactured by Kao Corporation), Nopco (registered trademark) 8034-L (manufactured by San Nopco Corporation) After adding 32 g, the mixture was stirred and mixed using a rotation and revolution type stirring device. LMB50 (manufactured by Nippon Limonite Co., Ltd .; pulverized and classified limonite produced from the mine for 3 years, pulverized and classified, the main component is goethite, average particle size 50 μm) 60.1 g is added, rotation and revolution type Lonefix eco # 700 (manufactured by Showa Denko KK, solid content concentration 50%) 3.50 g, which is an aqueous resin emulsion, is added to a mill base prepared by stirring and mixing using a stirrer, and a revolving and rotating stirrer is used. Limonite paste B was obtained by stirring and mixing. The appearance (photograph) of the obtained paste B is shown in FIG.

Preparation Example 3: Preparation of limonite paste C 20.00 g of 2% aqueous solution of Celny (registered trademark) H (manufactured by Nippon Soda Co., Ltd.), which is hydroxypropylcellulose, was weighed into a 150 mL polyethylene container. There, 1.00 g of Demol (registered trademark) EP (manufactured by Kao Corporation), 0.81 g of Emulgen (registered trademark) 108 (manufactured by Kao Corporation), Nopco (registered trademark) 8034-L (manufactured by San Nopco Corporation) After adding 33 g and 1.25 g of potassium metaphosphate (manufactured by Taiyo Chemical Co., Ltd., (KPO ₃ ) _n , n≈10,000), the mixture was stirred and mixed using a rotation and revolution type stirring device. LMB50 (manufactured by Nihon Limonite Co., Ltd.) 60.1 g was added to the mill base prepared by stirring and mixing using a rotation and revolution type stirrer, and water-based resin emulsion loan fix eco # 700 (manufactured by Showa Denko KK, solid content concentration) Limonite paste C was obtained by adding 3.54 g and stirring and mixing using a rotation and revolution type stirrer.

Example 1:
20 g of paddy rice seeds and 10 g of LMB50 (manufactured by Nippon Limonite Co., Ltd.) were loaded into a rolling granulator equipped with an 18 cm granulation pan. Rotating the granulation pan, spraying a 10-fold diluted Lonfix eco # 700 (Showa Denko Co., Ltd., solid content concentration 50%), which is a water-based resin emulsion, with ion-exchanged water, where the seed meal and LMB50 are familiar I was dressed. The same operation was repeated, and 10 g of LMB50 was finally coated with 7.9 g of an emulsion diluted 10 times (resin 0.395 g), and then dried overnight on a 20 cm × 20 cm stainless steel vat to obtain a coated paddy rice seed cake.

Example 2:
A rolling granulator equipped with an 18 cm granulation pan was charged with 20 g of paddy rice seed meal. The granulation pan was rotated, and 1.5 g of paste B obtained in Preparation Example 2 was scraped from the container with a spatula to add the paste to the seed pod. The same operation was repeated, and finally 15 g of paste B was coated on the seed basket and then dried on a 20 cm × 20 cm stainless steel vat overnight to obtain a coated paddy rice seed basket (α). The appearance (photograph) of the obtained coated rice seed pod (α) is shown in FIG.

Example 3:
A coated paddy rice seed meal was obtained in the same manner as in Example 2, except that 15 g of paste C obtained in Preparation Example 3 was used instead of Paste B.

Examples 5-7:
Instead of the LMB50 powder, 10 g of zinc oxide (manufactured by Kanto Chemical Co., Inc.), tin oxide (II) (manufactured by Kanto Chemical Co., Ltd.) and tin oxide (IV) (manufactured by Kanto Chemical Co., Ltd.) Except for the use, the same operation as in Example 1 was performed to obtain a coated paddy rice seed pod. In this case, however, 0.05 g of the colorant TS Brown · KR2 (manufactured by Taisho Technos Co., Ltd.) was added during the coating operation. The 10-fold diluted emulsion aqueous solution of Lonefix eco # 700 used was 6.9 g (resin 0.345 g), 7.5 g (resin 0.375 g), and 7.4 g (0.37 g), respectively.

Examples 8-10:
In Examples 1 to 3, 0.15 g of inosine was added and the same operation was performed to obtain a coated paddy rice seed meal. Inosine was added simultaneously with the addition of LMB50 in Example 8 and simultaneously with the initial addition of pastes B and C in Examples 9-10.

Examples 11-13:
In Examples 1 to 3, 0.15 g of uric acid was added and the same operation was performed to obtain a coated paddy rice seed meal. The uric acid was added simultaneously with the addition of LMB50 in Example 11 and simultaneously with the initial addition of pastes B and C in Examples 12-13.

Examples 14-16:
In Examples 1 to 3, 0.075 g of uric acid and 0.075 g of inosine were added and the same operation was performed to obtain a coated paddy rice seed meal. The addition of uric acid and inosine was performed simultaneously with the addition of LMB50 in Example 14, and simultaneously with the initial addition of pastes B and C in Examples 15-16.

Comparative Example 1:
A rolling granulator equipped with an 18cm granulation pan, 20g of paddy rice seeds, and "Powder Beauty" (registered trademark, manufactured by JFE Steel Co., Ltd., Kinsei Matec Co., Ltd.) 2 g of a mixture of gypsum and a mass ratio of 10: 1) was added. The granulation pan was rotated, and ion-exchanged water was sprayed on the familiar place and dressed. Repeat the same operation, finally add 11 g of “Beautiful Beauty”, add 0.5 g of finished calcined gypsum, and then dress it with spraying ion-exchanged water, all day and night on a 20 cm × 20 cm stainless steel vat. Dried.
Since the surface of the coated seeds after drying was white, water was sprayed so as to soak the whole coated seeds, and dried all day and night. The same operation was repeated for another 3 days until the surface became reddish brown to obtain a coated paddy rice seed meal (β).

Comparative Example 2:
A coated paddy rice seed meal was obtained in the same manner as in Example 1 except that iron powder (manufactured by Kanto Chemical Co., Inc., particle size 60-80 μm) was used instead of LMB50 powder.

Comparative Example 3:
2 g of a mixture of 20 g of paddy rice seeds, 10 g of iron (III) oxide (manufactured by Kanto Chemical Co., Ltd.) and 1 g of calcined gypsum was added to a rolling granulator equipped with an 18 cm granulation pan. The granulation pan was rotated, and ion-exchanged water was sprayed on the familiar place and dressed. The same operation was repeated, and finally 11 g of a mixture of iron oxide and calcined gypsum was added, 0.5 g of finished calcined gypsum was added, and then powdered while spraying ion-exchanged water, and a stainless steel of 20 cm × 20 cm. It dried on the vat all day and night, and obtained the coated paddy rice seed potato (δ).

Comparative Example 4:
The same operation as in Example 2 was performed except that the paste A obtained in Preparation Example 1 was used in place of the paste B to obtain a coated paddy rice seed meal (γ).

Reference example:
After seeding seeds purchased from Uken, Inc. (variety: Milky Queen, produced in Toyama Prefecture in 2014) with salt water prepared to a specific gravity of 1.13 using a salt water seed meter (Sato Meters Co., Ltd.) It was immersed in water adjusted to 15 ° C. and held for 5 days. After taking out from water, it was air-dried in a room kept at a room temperature of 25 ° C. for 24 hours to obtain paddy rice seed meal (w).

[Sprouting test]
A stainless steel mesh having a mesh size of 2 mm was placed at a position 8 mm below the water surface. 100 grains of the coated paddy rice seeds produced in Examples 1 to 3 and Comparative Examples 1 to 4 were placed on the mesh and cultivated for 10 days while maintaining the water surface height in a constant temperature room at 20 ° C. . The number of seed buds germinated every two days was counted. Table 1 shows the measurement results.
Moreover, about the coated paddy rice seed pods manufactured in Examples 4 to 16, the number of seed buds germinated after 10 days was measured. The results are shown in Tables 2-3.

[Coating material disintegration test]
Limonite powder-containing resin-coated paddy rice seed pod (α) produced in Example 2, iron powder powder-containing resin-coated rice seed pod (β) produced in Comparative Example 1, and iron oxide A-containing resin coating produced in Comparative Example 4 For the rice seed pod (γ), the coating layer was visually observed on the third day after the start of the germination test.
As a result, there was no change in the appearance of the coating layer in the limonite powder-containing resin-coated paddy rice seed pod (α), and the iron powder-containing resin-coated rice seed pod (β) was dissolved and the spreading of iron rust around the seed was confirmed. In addition, in the iron oxide A powder-containing resin-coated paddy rice seed pod (γ), it was confirmed that a part of the coating layer peeled off.

[Bird damage test]
Raw seeds (variety: Milky Queen, Toyama prefecture, seeds purchased from Uken, Inc.), limonite powder-containing resin-coated rice seeds produced in Example 2 (α), iron produced in Comparative Example 1 The powder-containing resin-coated paddy rice seed pod (β) and the iron oxide (III) -coated paddy rice seed pod (δ) produced in Comparative Example 3 were placed on a stainless steel bat (width 150 mm × depth 150 mm × height 20 mm), respectively. 100 grains were scattered. The four stainless steel bats prepared here were placed side by side on the outdoor ground (location: Midori Ward, Chiba City, Showa Denko Co., Ltd.) from 10 to 15 on October 12 to 14, 2016. After leaving, the number of seeds preyed by birds (sparrows) was counted, and the ratio (%) was calculated based on the number of grains initially introduced and evaluated as the degree of bird damage. The same operation was carried out over 3 days. The results are shown in Table 4.

In the coated paddy rice seed meal (Examples 1 to 3) produced using the seed meal coating agent of the present invention, the result was that the germination rate was higher than the seed meal (Comparative Example 1) conducted using the conventional iron coating material. It was. This is considered to be due to the suppression of heat generation due to oxidation that occurs during the coating process. Moreover, since the germination rate of the coated paddy rice seed pods (Examples 1 to 3) of the present invention is almost the same as that of the uncoated seed pods (reference examples), the coating treatment of the present invention does not adversely affect the germination rate itself. It is suggested.
Moreover, the seed meal coating agent (Examples 4-7) which uses the powder of zinc oxide and tin oxide (II, IV) as powder (a), and the seed meal coating agent which added inosine and uric acid (Example 8- As for the coated paddy rice seed produced using 16), the germination rate after 10 days was almost 100%.
The coated paddy rice seed pod (α) produced in Example 2 was not coated with seed pod (raw seed), iron powder powder-containing resin-coated paddy rice seed pod (β), or iron (III) -coated paddy rice seed pod (δ). The result was the least bird damage.
In the coated paddy rice seed meal produced in Comparative Example 2, peeling of the coating layer occurred in water before germination during the germination test. Further, the coated paddy rice seed produced in Comparative Example 3 was peeled off only by rubbing with a finger.
From the above results, the excellent effect of the coated paddy rice seed meal of the present invention in which the metal oxide powder and the resin are combined is clear.

  ADVANTAGE OF THE INVENTION According to this invention, the metal oxide (iron oxide, zinc oxide, tin oxide) containing resin-coated paddy rice seed can be manufactured efficiently, and it is widely used in the agricultural field where crops are cultivated, particularly in rice cultivation. Is possible.

Claims (16)

  A paddy rice seed cake having a coating layer, wherein the coating layer contains at least one powder (a) and resin (b) selected from brown iron oxide, zinc oxide, and tin oxide.   The paddy rice seed meal according to claim 1, wherein the coating layer is brown.   The paddy rice seed meal according to claim 1 or 2, wherein the brown iron oxide is limonite.   The paddy rice seed meal according to any one of claims 1 to 3, wherein the brown iron oxide contains goethite.   The paddy rice seed meal according to any one of claims 1 to 4, comprising 10 to 50% by mass of the powder (a) with respect to the rice seed seed meal having a resin coating layer.   The paddy rice seed meal according to any one of claims 1 to 5, comprising 70 to 99% by mass of the powder (a) with respect to the resin coating layer.   The paddy rice seed meal according to any one of claims 1 to 6, wherein the average particle size of the powder (a) is in the range of 30 to 100 µm.   Furthermore, the paddy rice seed meal in any one of Claims 1-7 which contains a fertilizer component (c) in a resin coating layer.   The resin (b) is selected from the group consisting of a vinyl acetate polymer resin, an acrylate copolymer resin, an ethylene / vinyl acetate / acrylic acid copolymer resin, and an ethylene / vinyl acetate copolymer resin. The paddy rice seed meal according to any one of claims 1 to 8, comprising the above resin.   The paddy rice seed meal according to any one of claims 1 to 9, wherein the resin (b) contains a biodegradable resin.   A composition containing resin (b) is sprayed on a mixture of at least one powder (a) selected from brown iron oxide, zinc oxide, and tin oxide and paddy rice seed meal, and the surface of the seed meal is powdered. A method for producing paddy rice seed meal having a resin coating layer containing powder, wherein a coating layer containing a resin is formed and then dried.   The paddy rice seed meal and the paste-like composition containing the powder (a) and the resin (b) are mixed to form a coating layer containing the powder and resin on the seed rice surface, and then dried. A method for producing paddy rice seed meal having a resin coating layer containing powder.   A composition for covering rice paddy rice seed comprising a composition comprising a resin (b) and at least one powder (a) selected from brown iron oxide, zinc oxide, and tin oxide.   The composition for coating paddy rice seed meal according to claim 13, wherein the composition containing the resin (b) is a resin emulsion.   The resin emulsion is an aqueous vinyl acetate polymer emulsion, an acrylic ester copolymer aqueous emulsion, an ethylene / vinyl acetate / acrylic acid copolymer aqueous emulsion, an ethylene / vinyl acetate copolymer aqueous emulsion, and a biodegradable aqueous resin. The composition for coating paddy rice seed meal according to claim 14, which is one or more resin emulsions selected from the group consisting of emulsions.   The paddy rice seed husk coating composition according to any one of claims 13 to 15, wherein the brown iron oxide is limonite.

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