JPS58149604A - Induction of germination of seed - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a method for germination of #i seeds.

It is the backbone of agricultural technology for sowing vegetable seeds, flower seeds, etc., and many improvements have been made to date.

In ms+ operations, it is extremely important to increase the germination rate of seeds and to aim for stable production of agricultural crops. For this purpose, a method of germinating and sowing seeds has been used for a long time.

For example, most of the legal grass that is sown in summer is germinated and then sown. The conventional method for germination is to soak the seeds in running water for a certain period of time, dehydrate them, and leave them wrapped in cloth to germinate the seeds. Since germinated seeds are generally difficult to sow by hand, the present inventors have proposed a method in which germinated seeds are mixed with a hydrogel made of a superabsorbent polymer and then mechanically sown (%M 1984-108494). A new sowing method has been found to result in faster germination and higher germination rates.

Generally, in order to ensure the growth of crops, it is necessary to uniformly germinate seeds (root length, etc.) to be sown.

However, the above-mentioned seeds have a low germination rate or are difficult to germinate uniformly.

The present inventors conducted intensive studies to solve the above-mentioned drawbacks, and found that the solution was to pre-electrolyte by mixing seeds soaked in water with a hydrogel made of a superabsorbent polymer and causing germination. It is physically or chemically crosslinked. Examples of polymer electrolytes include those having a hydroxyl group in the molecule. Salts such as sodium chloride, potassium, and anthea are preferred from the viewpoint of crop growth.

For example, Dan1/acrylate graphite copolymer,
Salt of styrene/maleic anhydride copolymer, polyacrylic 1
v11 salt polymer 1. Polyvinyl alcohol-1v/acrylic acid salt graft copolymer, vinyl-este A//saponified product of ethylenically unsaturated l carboxylic acid or its derivative, polyvinyl alcohol-1v/maleic anhydride fWII reaction product, crosslinking of polyvinyl alcohol You can give things.

In particular, an ethylenically unsaturated acid or its derivative as (X) lJ1min and Ll''X:
Polyacrylic! is a saponified product of a copolymer with a 7μ ratio in the range of Y=20:8G to 80:20. Highly absorbent materials with hydroxyl groups in the molecule, such as acid acid polymers, polyvinyl alcohol/acrylic acid salt 1 graft copolymers, crosslinked products of polyvinyl alcohol, and salts of polyvinyl alcohol/I//maleic anhydride reactants. Polymers having high strength after water absorption are suitable for use in the present invention.

The shape of the superabsorbent polymer used in the present invention is preferably granular, and can be obtained, for example, by a suspension polymerization method.The method for germinating seeds of the present invention will be specifically described. Seeds are immersed in running water for a certain period of time and then uniformly mixed with a superabsorbent polymer hydrogel that has sufficiently absorbed the water. Next, wrap the outside with a wet cloth bag to prevent moisture evaporation and germinate the seeds.

According to the method of the present invention, the surface of the seeds is constantly released from the hydrogel to maintain appropriate moisture and conditions, resulting in conditions suitable for germination.

However, the germination rate is high and it is possible to germinate evenly.

Also, the main f! The amount of superabsorbent polymer hydrogel used in J4 differs depending on the type of seeds to be germinated, but approximately the same amount is appropriate; if it is too small, it will not be effective, and if it is too large, it will cause damage to the surrounding area of the seeds. Germination rate may decrease due to lack of oxygen supply or excessive humidity.

Other advantages of the present invention are (1) Germination is performed indoors under ideal conditions, completely avoiding germination problems caused by dormancy or low temperatures depending on the type of seed. be able to. (2) When sown in the field using germinated seeds, a high germination rate and growth can be seen even if there are variations in the quality of the soil bed or unfavorable weather. (
3) The amount of seeds can be saved. (4) Seeds germinated by the method of the present invention can be used very effectively for fluid seeding.

EXAMPLES Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited thereto.

Production Example 1 0.7 mol of vinyl acetate, 0.6 mol of methyl acrylate, 0.08 mol of ethylene glycol diacrylate as a crosslinking agent, and 0.02 mole/I/1 polymerization initiator of benzoylperoxy) and ξ as a dispersion stabilizer, partially saponified polyvinyl #7A/1-/I/8P and NaC
/ 10 t of water at 66°C.
Suspension polymerization was carried out for 6 hours. Next, the upper r copolymer 10
t was dispersed in 200 methanol, a 40% KOR aqueous solution 60-e was added, and the mixture was saponified at 60 t for 6 hours. The degree of saponification can be approximately 91 moA/excellent. The obtained superabsorbent polymer has a spherical shape with a diameter of 20 to 200μ, is insoluble in water, and has a diameter of 6
It has a water absorption rate of 60 times. The diameter of the hydrogen after water absorption was 160-1600μ.

-Preparation Example 2 In an 800- flask, sorbitan monostearate o,
9F was dissolved in 100 m/h of hexane. On the other hand, water 2o-, acrylic acid 15P and sodium hydroxide 6.7F
were mixed and 5G+19 of potassium persulfate was added to prepare an aqueous sodium acrylate solution. The sodium acrylate aqueous solution was added dropwise to a hexane solution in which sorbitan monostearate was dissolved, while stirring at 26 Orpm.
Polymerization was carried out at 62° C. for 8 hours while stirring. After polymerization, the mixture was separated by filtration and dried under reduced pressure at 80° C. for 10 hours. The resulting highly absorbent polymer has a spherical shape with a diameter of 20 to 80 μm, is insoluble in water, and has a water absorption rate of 450 times. The diameter of the hydrogel after water absorption was 180-660μ.

Example 1 The superabsorbent polymers obtained in Production Examples 1 and 2 were poured into water approximately 600 times its own weight to form a hydrogel. The seeds are pre-soaked in running water for 10-15 hours, then dehydrated, and then thoroughly mixed by hand with the same volume of hydrogel as the seeds. The uniformly mixed seeds and hydrogen are placed in a cloth bag and left to germinate at a temperature that is suitable for seed germination. 1III! 1/*/': #j・Comparative Example 1 Same as Example 1, but the hydrogel was not mixed together and germinated.

Claims (1)

[Claims] A method for germinating seeds, which comprises mixing seeds pre-soaked in water with human W gel made of a superabsorbent polymer and germinating the seeds.