JP2006246708A - Raising seedling mat for paddy or the like - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a raising seedling mat for paddy or the like reducing burden on work for preparing raising seedling beds. <P>SOLUTION: The raising seedling mat for paddy or the like is formed so that water retainable material, resin-coated fertilizer particles, and resin-coated agrichemical component-containing particles are held on a mat base material comprising only natural fibers, or composite fibers of natural fibers and chemical fibers. The resin-coated fertilizer particles comprise coated fertilizer containing nitrogen components, preferably coated urea. The amount of the nitrogen components is equivalent to that necessary in its growing period after transplanting the paddy to a regular rice field. The agrichemical component-containing particles comprise agrichemical components effective on prevention of blast, agrichemical components effective on prevention of ricewater weevils, leafhoppers and the like, or agrichemical components effective on prevention of stinkbugs. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mat for raising seedlings for raising rice seedlings before transplanting to Honda.

In recent years, under the situation where the agricultural working population is decreasing and aging is progressing, seedling raising techniques such as rice using a seedling box have been developed in parallel with the development of transplanting machines. However, in raising seedlings in a seedling box, many accompanying operations such as filling of seedling containers into seedling containers, sowing seed pods, mixing fertilizers and disinfectants necessary during the seedling period, and irrigation of seedling boxes after sowing Is required. For this reason, there is an increasing number of cases where each farmer does not carry out the seedlings themselves but entrusts them to specialized nursery centers.
In these nursery centers, a series of operations for preparing a nursery bed is performed using a dedicated fertilizing and sowing apparatus for a seedling box (for example, an apparatus described in Patent Document 1).
However, in a farmer who does not entrust the nursery center, complicated preparation work of the nursery bed is a heavy burden.
With the advent of a slow-acting fertilizer with a physically reduced elution rate, not only during the seedling period, but also the amount of fertilizer necessary for growth in Honda is mixed into the nursery bed, along with rice seedlings at the time of transplantation. In order to reduce the frequency of fertilization in Honda, it has been tried. However, on the other hand, it is necessary to apply a large amount of fertilizer uniformly and accurately to the seedling box, and the work is complicated. A device that automatically fills floor soil, sowing, fertilizing, applying medicine, and covering soil has also been put into practical use, but adjustment of fertilization and dosage is complicated, and it is easy to cause excess and deficiency of fertilization and dosage at the start of use. . In particular, excessive and insufficient fertilizers tend to cause insufficient fertilization and excessive harm. Thus, the contents of the nursery bed adjustment work are complicated.

Japanese Patent Laid-Open No. 11-127696

  Providing a mat for raising seedlings that can reduce the burden of preparation work for nursery beds.

As a result of intensive studies, the present inventor has found that a mat substrate made of natural fibers alone or mixed fibers of natural fibers and chemical fibers has a water retention material, resin-coated fertilizer particles, and resin-coated pesticide component-containing particles. The present invention has been completed by finding that the use of the mat for raising seedlings that has been carried facilitates the adjustment work of the nursery bed as compared with conventional nursery beds using culture soil.
Further, by using the mat for raising seedlings, the necessary fertilizer and pesticide per unit area can be accurately supplied, and it is possible to prevent excess and shortage of fertilization and medicinal effects during the raising seedling and in Honda. I found.

The present invention is
[Invention 1]
Rice seedling breeding mats with a water retention material, resin-coated fertilizer particles, and resin-coated agrochemical component-containing particles on a mat substrate made of natural fibers alone or mixed fibers of natural fibers and chemical fibers A mat for raising rice seedlings carried;
[Invention 2]
The resin-coated fertilizer particles are resin-coated fertilizer particles containing a nitrogen component, and the amount of the nitrogen component is the amount of nitrogen component required during the growth period after transplanting rice seedlings into Honda. Nursery mats;
[Invention 3]
The mat for raising seedlings according to invention 2, wherein the resin-coated fertilizer particles are coated urea;
[Invention 4]
The resin-coated agrochemical component-containing particles are the agrochemical components effective for controlling rice blast, or the resin-coated agrochemical component-containing particles containing an agrochemical component effective for controlling rice weevil or planthoppers. Seedling mats according to any one of 3;
[Invention 5]
The mat for raising seedlings according to any one of inventions 1 to 3, wherein the resin-coated particles containing agrochemical components are resin-coated particles containing agrochemical components effective for controlling stink bugs;
[Invention 6]
Rice seedling method using the seedling mat according to any one of inventions 1 to 5;
It is.

The mat base material constituting the mat for raising seedlings in the present invention is produced using natural fibers alone or mixed fibers of natural fibers and chemical fibers. Examples of natural fibers to be used include pulp, cotton, hemp, silk, wool and the like, and these fibers are preferable because they are all decomposed in the natural environment. Examples of chemical fibers used with natural fibers include fibers such as rayon, acetate, nylon, polyester, polyolefin, and vinylon.
The mat base material can be manufactured by, for example, the following method using a natural fiber alone or a mixed fiber of natural fiber and chemical fiber as a raw material. (A) A natural fiber alone or a mixed fiber of a natural fiber and a chemical fiber is three-dimensionally knitted in the shape described in JP-A-7-241136, JP-A-09-59812, and the like to form a mat base material for a three-dimensional knitted fabric; (B) Plane knitting (open knitting, closed knitting, single warp knitting, flat knitting, rubber knitting, pearl knitting, tuck knitting, natural fiber alone or mixed fiber of natural fiber and chemical fiber , Weft knitting such as lace knitting), and laminating the resulting flat knitted fabric in the vertical or horizontal direction, and joining each sheet with a binder, or joining by thread passing in the sheet laminating direction, (C) A natural fiber alone or a mixed fiber of natural fiber and chemical fiber is laminated in a random direction, and each fiber is fixed in a mesh shape with a natural resin or a synthetic resin, A mat substrate is used.
Examples of the binder used here include natural polymers, synthetic resins, natural and synthetic rubbers, and the like. Examples of the natural polymer include starch, carboxymethylcellulose, methylcellulose, ethylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, sodium alginate, guar gum, xanthan gum, bean gum, carrageenan, gluten and the like. Examples of the synthetic resin include polyvinyl alcohol, carboxymethyl cellulose, ethyl cellulose, acrylic resin, phenol resin, polyurea resin, polyurethane resin, unsaturated polyester resin, polyamide resin, and ethylene copolymer resin. Examples of natural and synthetic rubbers include natural rubber, acrylic rubber, butyl rubber, polyisobutylene rubber, styrene / butadiene rubber, ethylene / propylene rubber, and chloroprene rubber. These can be used alone or in combination of two or more. Of these, preferred are water-soluble polymers such as starch, carboxymethylcellulose, and sodium alginate.

The mat base material is 10% by weight or less of the mat for raising seedlings of the present invention so that the mat base material does not hinder rice growth after transplanting to Honda. In addition, the mat substrate in the present invention has a tensile strength in the plane direction of the mat substrate of 5 or more when dry / wet so that it can be easily separated for each rice seedling by force when transplanted by a transplant machine. Such a thing is preferable.
The size of the mat is not particularly limited as long as it is suitable for transportation and machine transplantation. However, because the inside dimensions of the rice seedling box currently widely used are 28 cm x 58 cm in length and width, and 2.5 cm in depth. (Hereinafter, a nursery box of this size will be referred to as a “normal rice nursery box”), the same size is convenient. On the other hand, in recent years, a method has been disclosed in which seedlings are raised using a mat (long mat) that is long in the vertical direction and machine transplanted. At that time, in order to use a conventional rice planting machine as it is or with a minimum modification for seedling rice planting, the width can be set to 28 cm and can be set to an arbitrary length (for example, 6 m) according to the purpose.
The mat for raising seedlings of the present invention preferably has a thickness sufficient for the rice seedlings raised by the seedling mat alone to have roots, and specifically has a thickness of 10 to 30 mm. That is, the mat substrate forming the seedling mat has the same thickness. When this seedling mat is used for a normal rice seedling box, a thickness of 10 to 25 mm is preferable.

The water-retaining material in the present invention is an alkali metal salt of a polymer electrolyte such as polyacrylic acid, methacrylic acid, 2- (meth) acryloylethanesulfonic acid, and a co-weight of these with acrylamide, 2-hydroxyethyl (meth) acrylate, etc. It is a solid made from a synthetic resin mainly composed of a coalescence and a cross-linked product thereof, and a natural resin described in JP-A-11-60737, etc., and is usually powdery or granular. A granular water-retaining material that can be easily supported on the seedling mat of the present invention is preferred.
The water-retaining material is used to retain the water necessary for raising rice seedlings, but does not mean the total water required during the whole seedling raising period, and at intervals where watering is performed on the nursery bed. Accordingly, the required amount of water changes accordingly. Usually, the required water retention capacity is preferably 500 to 3000 ml, more preferably 500 to 2000 ml, per unit area of 28 × 58 cm.

  Examples of the resin-coated fertilizer particles in the present invention include coated fertilizer particles containing a nitrogen component as a main component, specifically, coated urea and coated chemical fertilizer. Examples of fertilizer components that may be further contained in the resin-coated fertilizer particles include elements required by rice such as phosphoric acid, potassium, silicic acid, magnesium, calcium, manganese, boron, and iron. Examples of fertilizer materials containing the above fertilizer components include urea, ammonium nitrate, ammonium nitrate clay, ammonium chloride, ammonium sulfate, ammonium phosphate, ammonium nitrate, sodium nitrate, calcium nitrate, potassium nitrate, coal nitrogen, formaldehyde processed urea fertilizer (UF), nitrogenous fertilizers such as acetaldehyde-processed urea fertilizer (CDU), isobutyraldehyde-processed urea fertilizer (IBDU), and guanneaurea (GU), superphosphate coal, heavy superphosphate coal, maternal superphosphate, phosphorus Phosphate fertilizers such as ammonium phosphate, bitter phosphate, ammonium sulfate, potassium phosphate, ammonium phosphate, potassium chloride, potassium sulfate, potassium sulfate, potassium sulfate, potassium bicarbonate, potassium phosphate, potassium nitrate, Calcium silicate, magnesium sulfate, magnesium chloride Arm, raw coal, consumption of coal, calcium carbonate, manganese sulfate, sulfate magnesia manganese slag manganese borate, borate, it can be mentioned steel slag.

These coated fertilizer particles are designed by dividing the elution rate of fertilizer components into an initial elution suppression period and a main elution period. When doing, it is preferable that the fertilizer component eluted in the seedling period is controlled to 10% by weight or less of the fertilization amount, and the more preferable dissolution amount in the period is 0.5 to 7% by weight, more preferably 1 to 1. 5% by weight. The initial elution suppression period is set to be equal to or slightly longer than the seedling raising period.
The resin-coated fertilizer particles in the present invention are not limited to one type, and a plurality of types of resin-coated fertilizer particles can be used as necessary.
As the coating material for producing such coated fertilizer particles, JP-A 63-147888, JP-A 2-275792, JP-A 4-202078, JP-A 4-202079, JP-A 5-201787 are disclosed. , JP-A-6-56567, JP-A-6-87684, JP-A-6-191980, JP-A-6-191981, JP-A-6-87684, etc. Can be used. There is no particular limitation on the method of coating the fertilizer particles with the coating material. For example, a solvent solution of a polymer substance disclosed in JP-A-5-212262 is stirred by the motion of the stirring device itself, and high A method of removing a solvent by adding to a granular material kept below the melting temperature of a molecular substance in a solvent, or spraying a polyolefin solution onto fertilizer particles in a jet state disclosed in JP-A-50-99858 A method of simultaneously drying with hot air of 5 m / sec or more can be used.
The resin-coated fertilizer particles in the present invention are usually in the range of 1 to 5 mm, preferably 2 to 4 mm.

  The amount of the resin-coated fertilizer particles carried by the seedling mat in the present invention is the amount of fertilization nitrogen required by rice seedlings after transplanting to Honda and the amount of nitrogen components contained in the resin-coated fertilizer particles. And the area of the nursery mat necessary for raising the seedlings to be transplanted to the area of the paddy field 10a (1000m2). The amount of fertilized nitrogen per 10a varies depending on the variety and region to be cultivated. These fertilizer nitrogen amounts can be known from the test results and fertilizer standards of agricultural test stations in each prefecture. However, in the mat of the present invention, the use efficiency of fertilizer components fertilized is improved, so 20% less nitrogen than the standard value. The amount is sufficient. In the case of cultivating the variety “Koshihikari” that has been widely cultivated in recent years under general field conditions west of Kanto, excluding mountainous areas, fertilizer particles coated with resin so as to be 4 to 6 kg / 10a as a nitrogen component. What is necessary is just to carry. In the case of using resin-coated granular urea having a nitrogen component content of 41%, a seedling mat carrying 390 to 730 g of resin-coated fertilizer particles per 28 cm × 58 cm area may be used.

The agrochemical component used in the resin-coated agrochemical component-containing particles in the present invention can include agrochemical components such as (A) bactericidal compound, (B) insecticidal compound, (C) plant growth regulating compound, Any conventional pesticide formulation with osmotic transferability can be used.
(A) As the bactericidal compound, for example, acibenzoral S methyl, azoxystrobin, IBP, isoprothiolane, iprodione, orisatrobin, kasugamycin, carpropamide, diclocimet, cimeconazole, thiuram, thiophanate methyl, tifluzamide, tricyclazole, triflumizole, valididamycin A , Hydroxyisoxazole, pyroxylone, furametopyr, phenoxanyl, procymidone, probenazole, benomyl, metasulfocarb and the like may be used in combination.
(B) As the insecticidal compound, for example, acetamiprid, acephate, ethylthiomethone, cartap, carpropamide, carbosulfan, clothianidin, dinotefuran, diazinon, thiacloprid, thiamethoxam, thiocyclam, NAC, nitenpyram, pymetrozine, pyridafenthione, bamidthione carloprofib , Propaphos, propoxyl, benfuracarb, bensultap, bendiocarb and the like may be used, and two or more of them may be used in combination. (C) As a plant growth regulation compound, uniconazole P, paclobutrazole, etc. are mentioned, and two or more kinds may be used together.

In the resin-coated pesticidal component-containing particles in the present invention, the pesticidal component is preferably an pesticidal component effective for controlling rice blast or rice weevil or planthopper. More preferably, it contains an agrochemical component effective for controlling blast and an agrochemical component effective for controlling rice weevil or planthoppers.
Pesticide ingredients effective in controlling blast disease include acibenzoral S methyl, azoxystrobin, isoprothiolane, IBP, orissastrobin, kasugamycin, carpropamide, diclocimet, tricyclazole, pyrokilone, phenoxanyl, probenazole, benomyl, metminostrobin, etc. Preferably, acibenzoral S methyl, azoxystrobin, isoprothiolane, orissastrobin, carpropamide, diclocimet, tricyclazole, pyroxylone, phenoxanyl, probenazole, benomyl, metminostrobin and the like.
Agrochemical ingredients effective for controlling rice weevil or planthoppers include acetamiprid, acephate, ethylthiomethone, cartap, carbosulfan, clothianidin, dinotefuran, diazinon, thiacloprid, thiamethoxam, NAC, nitenpyram, pymetrozine, bamidthione, fipronil, prothiocarb, Benflacarb, bensultap, and bendiocarb are preferable, and preferably acetamiprid, cartap, carbosulfan, clothianidin, dinotefuran, thiacloprid, thiamethoxam, nitenpyram, pymetrozine, fipronil, and benfracarb.

In recent years, stink bugs that suck rice seeds and produce spotted rice have become a major problem. That is, when a stink bug soaks rice brown rice at the heading stage, black or brown soaked traces are produced in the rice grain from which the wound was harvested. Rice that contains more than a certain percentage of rice grains with a soaked soak mark is a speckled rice, which lowers the grade of the rice, thus reducing the economic value of the harvest. There are many kinds of stink bugs that harm rice ears, but typical examples of such harmful insects are the winged beetle, the spider helicopter, the red beetle winged turtle, and the red mosquito turtle. Generally, these stink bugs may be collectively referred to as “spotted rice stink bugs”.
In the resin-coated pesticidal component-containing particles in the present invention, the pesticidal component is preferably an pesticidal component effective for controlling stink bugs, that is, spotted rice stink bugs.
Pesticide components effective for the control of stink bugs include acetamiprid, thiacloprid, thiamethoxam, and nitenpyram.

The resin-coated pesticidal component-containing particles in the present invention are not limited to one type, and a plurality of types of resin-coated pesticidal component-containing particles may be used as necessary.
It is also possible to use the above bactericidal compound, insecticidal compound and plant growth regulating compound together. In the seedling mat of the present invention, when coated particles containing a plurality of agrochemical components are used, the medicinal effects are different with respect to the target plant, and the optimum prescription can be selected individually. If the agrochemical active ingredient may be decomposed when mixed, the agrochemical ingredient may be carried on separate coated particles. In addition to the resin-coated pesticidal component-containing particles in the present invention, uncoated particles containing the pesticidal component may be carried on the mat base material.
The amount of the agrochemical component is the amount of pesticides put into a normal rice seedling box, or the number of normal rice seedling boxes necessary for raising seedlings to be planted in a fixed area of the field, and the fixed area of the field. It can be calculated from the amount of pesticides introduced into the plant. In general, rice seedlings grown in a seedling box having an inner shape of 28 cm × 58 cm are used at 20 to 25 boxes per 10a. Therefore, it is usually 10 to 300 g, preferably 20 to 250 g per seedling sheet 3.2 to ⁴ m ² . When the amount is 10 g or more, the medicinal effect effectively acts on the plant, and when it is 300 g or less, it is economically advantageous.

The resin-coated particles containing agrochemical components in the present invention are particles containing agrochemical components covered with a coating material, do not cause phytotoxicity to rice seedlings during the seedling raising period, and are effective during the growing period after transplanting to Honda. The component elution was adjusted so as to last for a long time.
As the coating material that can be used, any conventional coating material for slow-release fertilizer particles can be applied. Specifically, (1) a mixture of phenol resin and talc, (2) sulfur, paraffin wax, and Diatomaceous earth mixture, sulfur, paraffin wax and talc mixture, (3) olefin resin, olefin resin and surfactant mixture, olefin resin and talc mixture, (4) pine yam, paraffin wax, polypropylene, polyethylene and talc (5) a copolymer of soybean oil and cyclopentadiene, and the like, and any organic substance that is insoluble to hardly soluble in water can be used. More specifically, natural rubber, styrene butadiene rubber, butadiene rubber, isoprene rubber, butyl rubber, ethylene propylene rubber, ethylene propylene non-conjugated diene rubber, polychloroprene rubber, nitrile rubber, acrylonitrile-butadiene rubber and other synthetic rubber, ethylene-acetic acid Vinyl copolymer, ethylene-acrylate copolymer, ethylene-acrylate copolymer, chlorosulfonated polyethylene, chlorinated polyethylene, urethane resin, styrene resin, vinyl chloride resin, olefin resin, polyester And thermoplastic / thermosetting resins such as polyamide resins and polyamide resins.

Resin-coated pesticide component-containing particles are formed by extruding particles containing agrochemical components into granules by extrusion granulation method, coating granulation method, adsorption method, etc., and then coating the surface of the particles with the above coating material Although there is no particular limitation on the method of coating with a coating material, for example, the methods disclosed in JP-A-5-906, JP-A-06-9304, JP-A-9-143005, JP-A-2004-189752 and the like are used. can do.
Next, a method for granulating the agrochemical-containing particles before coating with the coating material will be described. In the extrusion granulation method, an agrochemical component, a binder, and a dispersant are added to an inorganic carrier such as clay, talc, bentonite, and calcium carbonate, kneaded with water, and then extruded through a screen of a certain size. After drying, screen to a certain size. In the coating granulation method, liquid pesticidal components (or solid pesticidal components added to a liquid by adding a suitable solvent) and auxiliary agents such as dispersing agents are added to a carrier such as granular silica and granular calcium carbonate. . And while mixing these, oil-absorbing fine powder (oil absorbing agent) such as white carbon is added stepwise. In this way, the surface of the carrier is coated with agrochemical components, adjuvants and the like absorbed by the oil-absorbing agent and formulated into a granular form. If necessary, a resin may be added to impart strength to the thin film on the surface. In the adsorption method, a liquid agrochemical component (or a liquid state obtained by adding an appropriate solvent to a solid agrochemical component) is sprayed or added to a granule carrier having an oil absorbing ability, as in the coating method, Adsorb evenly. This adsorption method uses a granular carrier obtained by pulverizing and screening natural minerals such as bentonite, pumice, calcined diatomaceous earth, and zeolite, and a component-free base that does not contain an agrochemical base by extruding granulation in advance. There is a method of pulverizing and adsorbing the liquid substance to this.

The weight ratio between the agrochemical-containing particles before coating and the coating material is generally 0.05 to 280, preferably 0.5 to 200, with respect to the particle 100. Moreover, the film thickness of a coating layer is 0.005-1 mm normally on an average, Preferably it is 0.1-0.5 mm.
The resin-coated pesticide-containing particles in the present invention are usually in the range of 0.5 to 5 mm, preferably 1 to 5 mm.

The mat for raising seedlings of the present invention is constituted by supporting the above-described water retention material, resin-coated fertilizer particles, and resin-coated agricultural chemical component-containing particles on the mat base material.
As a method for supporting the water retaining material on the mat base material, a conventional technique can be used. For example, when the mat substrate is a laminate of fiber flat knitted sheets and the water retention material is a powdered material, a powder water retention material is sandwiched between two plane knitted sheets, which is suitable for a mat substrate. A method such as spraying a water retaining material dissolved in a solvent can also be used. In addition, when the water retention material is granular with the same particle size as the resin-coated fertilizer particles or resin-coated agricultural chemical component-containing particles, the same method as the resin-coated fertilizer particles or resin-coated agricultural chemical-containing particles Can be carried on the mat substrate.

  The resin-coated fertilizer particles and the resin-coated pesticide-containing particles can be supported on the mat substrate by the following method.

(A) When the mat substrate is a three-dimensional knitted fabric of natural fibers or mixed fibers of natural fibers and chemical fibers In the network structure of the three-dimensional knitted fabric, resin-coated fertilizer particles and resin-coated pesticides The contained particles are physically pushed in and fixed by spraying a binder to prevent the particles from falling off during transport or the like, thereby constituting the mat for raising seedlings of the present invention.
As the binder that can be used for this purpose, the same binder as that described in the mat substrate can be used. When spraying the binder, the binder is dissolved in an appropriate solvent (water, alcohols, etc.).

(B-1) When the mat base material is a laminated body in a vertical direction of a flat knitted fabric of natural fibers or mixed fibers of natural fibers and chemical fibers, a fertilizer coated with resin between a plurality of flat knitted fabrics The particles and resin-coated pesticide-containing particles are sandwiched as evenly as possible. This is repeated several times as necessary to obtain the desired thickness, and then the above-mentioned binder is sprayed to join the sheets or to pass the yarns at appropriate intervals in the sheet stacking direction. To form a mat for raising seedlings of the present invention.

(B-2) In the case where the mat base material is a laminated body in a horizontal direction of a flat knitted fabric of natural fibers or mixed fibers of natural fibers and chemical fibers As shown in FIG. By using a part of adjacent knitted fabrics, a substantially honeycomb sheet-like material is produced. Resin-coated fertilizer particles and resin-coated pesticide-containing particles are sandwiched between the formed honeycomb-shaped space portions. In the sheet-like material, by arranging a plane knitted fabric parallel to the sheet direction (perpendicular to the above-described plurality of plane knitted fabrics) so as to be the bottom in each honeycomb shape, the sheet It is preferable for preventing the particles from falling off from the particles. Furthermore, you may spray said binder. A plurality of the sheet-like materials are laminated and formed as a seedling mat of the present invention with a desired thickness.

(C) When the mat substrate is a monofilament in which natural fibers or mixed fibers of natural fibers and chemical fibers are laminated in a random direction and each fiber is fixed in a network by a binder. In a form having a thickness, natural fibers or mixed fibers of natural fibers and chemical fibers, and resin-coated fertilizer particles and resin-coated pesticide-containing particles are packed as evenly as possible. The seedling mat of the present invention is configured by fixing the whole by spraying a binder.

  The seedling mat of the present invention is very lightweight in a dry state, but increases in weight due to moisture absorption, and further deteriorates fertilizer particles and agricultural chemical particles coated with a resin. Elution of the resin-coated fertilizer particles is controlled by allowing the fertilizer to dissolve when moisture enters the inside of the coating, and then the dissolved fertilizer gradually leaches out. The stage in which moisture enters the coating and the fertilizer dissolves substantially corresponds to the initial elution suppression period. Therefore, if moisture enters the fertilizer particles coated with resin during storage, the initial elution period becomes shorter than the design when the mat is used, which is not preferable. Moisture penetration into the fertilizer particles depends on temperature and ambient humidity conditions, and is faster at higher temperatures and higher ambient humidity. For this reason, when storing the mat for seedlings of the present invention, it is wrapped in a non-permeable package or stored under low humidity conditions and low temperature conditions.

  In order to prepare a nursery bed using the seedling mat of the present invention, the seedling mat of the present invention is laid in a seedling container or a flat suitable place, and a normal amount of germinated rice seeds, that is, 28 cm. Spread uniformly 100 to 300 g per 58 cm. Thereafter, the soil is covered or covered with a nonwoven fabric as described in JP-A-10-210868. Then, it is made to germinate by keeping at 30-32 degreeC for 1-2 days, and keeps at about 20-27 degreeC after that, and raises a seedling. It can grow 2.5 leaf seedlings in about 3 weeks and 3.5 leaf seedlings in about 5 weeks.

  For rice seeds, seed fir selection (after disinfection, removing floating fir by salt water selection, drying after washing with water), soaking (soaking for 5 days to make the seed fir evenly absorbed. , Repeated oxygen supply by draining water), germination (after oxygen supply, soaked at 32 ° C. hot water for 10 hours to make a pigeon breast state) and the like.

  It is possible to easily raise seedlings by irrigating water containing a fertilizer or the like necessary for the seedling raising time to a seedling bed using a seedling mat in which rice seeds are embedded at appropriate intervals. Moreover, since the mat for raising seedlings of the present invention can retain moisture necessary for raising seedlings by using the mat for raising seedlings alone, it is not necessary to use floor soil.

  The mat for raising seedlings of rice seedlings of the present invention contains fertilizers and pesticides necessary for the period during which rice is grown in Honda, and the work required for preparing the nursery bed is greatly reduced. Furthermore, since the moisture required for raising seedlings can be retained by the seedling mat alone, heavy soil cultivation is unnecessary, and the operation of setting rice seedlings in the transplanting machine can be easily performed.

1 is a cross-sectional view of a seedling mat according to an embodiment of the present invention, in which a mat substrate is a laminated body in a vertical direction of a flat knitted fabric. The schematic diagram of the seedling mat which is one embodiment of the present invention whose mat base material is a layered product of a plane knitted fabric of the transverse direction is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Plane knitted fabric which consists of natural fiber or mixed fiber of natural fiber and chemical fiber 2 Agrochemical component-containing particle coated with resin 3 Fertilizer particle coated with resin 4 Water retention agent 5 Thread for fixing

Claims (6)

A mat for seedling raising seedlings, in which a mat substrate made of natural fibers alone or mixed fibers of natural fibers and chemical fibers is loaded with water retention material, resin-coated fertilizer particles, and resin-coated particles containing agrochemical components. . Rice seedling raising mat, resin-coated fertilizer particles are resin-coated fertilizer particles containing a nitrogen component, and the amount of the nitrogen component is the nitrogen required during the growth period after transplanting rice seedlings The mat for raising seedlings according to claim 1, which is an amount of ingredients. The mat for raising seedlings according to claim 2, wherein the resin-coated fertilizer particles are coated urea. The resin-coated particles containing agrochemical components are particles coated with agrochemical components effective for controlling rice blast or a resin-coated particles containing agrochemical components effective for controlling rice weevil or planthoppers. The mat for raising seedlings according to any one of -3. The mat for raising seedlings according to any one of claims 1 to 3, wherein the resin-coated particles of agrochemical component are resin-coated particles containing a pesticide component effective for controlling stink bugs. A method for raising rice seedlings using the seedling mat according to claim 1.

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