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Particulate water-absorbing agent for growth of plant which comprises water-absorptive polyacrylic acid (salt) resin as main ingredient

A technology of plant cultivation and water-absorbing resin, applied in botany equipment and methods, cultivation, application, etc., can solve the problems of seed suffocation, undisclosed seed germination rate, hindering germination, etc., achieve high germination rate, excellent water absorption characteristics, reduce wasteful effect

Active Publication Date: 2011-08-31
NIPPON SHOKUBAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With this method, the seeds and water retaining agent are spread evenly, however, the germination rate of seeds sown on particularly dry land is not disclosed
[0013] In addition, the granulating agents or water-absorbent resins disclosed in these prior art documents have the problem that, due to their small particle size, they cover the surface of the seeds without gaps when they absorb water and swell, thereby easily causing suffocation of the seeds.
In addition, when the plant seed coating agent is attached, if a plurality of plant seeds are included, since the plurality of seeds consume the water necessary for germination, there is a problem that the water is insufficient and the germination is hindered.
In addition, even after germination, water and nutrients are consumed by multiple seedlings, so there are problems such as insufficient growth, and thinning of seedlings is necessary.

Method used

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  • Particulate water-absorbing agent for growth of plant which comprises water-absorptive polyacrylic acid (salt) resin as main ingredient
  • Particulate water-absorbing agent for growth of plant which comprises water-absorptive polyacrylic acid (salt) resin as main ingredient
  • Particulate water-absorbing agent for growth of plant which comprises water-absorptive polyacrylic acid (salt) resin as main ingredient

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0276]Acrylic acid was neutralized with caustic soda to obtain 4,500 g of a sodium acrylate aqueous solution (1) having a neutralization rate of 75 mol % (monomer concentration: 39% by weight). In this aqueous solution (1), 5.6 g of trimethylolpropane triacrylate was dissolved to obtain a reaction liquid (1). Then, the reaction solution (1) was degassed for 30 minutes under a nitrogen atmosphere. Then, the reaction solution (1) was sent to a reactor formed by attaching a cover to a stainless steel double-arm type kneader with a jacket having two sigma-type blades and an inner volume of 10 L. The reaction liquid (1) was replaced with nitrogen gas while maintaining the temperature at 30°C. Next, while stirring the reaction liquid (1), 2.0 g of sodium persulfate and 0.01 g of L-ascorbic acid were added as an aqueous solution, and polymerization started about 1 minute later. Before 60 minutes after the start of the polymerization, the hydrogel-like crosslinked polymer (1) was ta...

Embodiment 2

[0278] Acrylic acid was neutralized with caustic soda to obtain 4,500 g of a sodium acrylate aqueous solution (2) having a neutralization rate of 71.3 mol % (monomer concentration: 39% by weight). In this aqueous solution (2), 5.0 g of polyethylene glycol diacrylate (the average number of additional moles of ethylene oxide: 8) was dissolved to obtain a reaction liquid (2). Then, this reaction liquid (2) was degassed for 30 minutes under nitrogen atmosphere. Then, the reaction solution (2) was sent to a reactor formed by attaching a cover to a stainless steel double-arm type kneader with a jacket having two sigma-type blades and an inner volume of 10 L. The reaction liquid (2) was replaced with nitrogen gas while maintaining the temperature at 30°C. Next, while stirring the reaction liquid (1), 2.26 g of sodium persulfate and 0.03 g of L-ascorbic acid were added as an aqueous solution, and polymerization started about 1 minute later. Before 60 minutes after the initiation of ...

Embodiment 3

[0282] Put the culture soil (manufactured by Takii Seedling Co., Ltd., trade name "Takii culture soil") mixed with the granular water-absorbing agent (a) obtained in Example 1 in a ratio of 0.05% by weight into the bottom hole In a vinyl resin tree pot (30 cm in length, 30 cm in width, and 50 cm in height) with a metal mesh of 38 μm attached thereto, it was filled to a height of 20 cm from the bottom, and seedlings and culture soil were put therein. The height of the surface is 40cm from the bottom.

[0283] From then on, watering with water (Himeji City) was performed once every 10 days, and the amount of watering was until the water flowed out from the bottom hole of the tree pot.

[0284] Repeat above-mentioned operation, measure the height of the seedling after 2 months, reach 48cm, grow taller 18cm.

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Abstract

Disclosed is a seed to be used for growing a plant, which has, attached thereon, a water-holding material composition for plant growth, wherein the water-holding material composition can increase the rate of germination of the seed even in an environment having a lower moisture content such as a dry region. Also disclosed is a seed having, attached thereon, a water-holding material composition for plant growth, wherein the water-holding material composition can exhibit a function as a supply source of water or a plant growth promoter to a plant after the seed is germinated and has excellent handling properties during sowing. A water-holding material composition for plant growth which comprises water-absorptive resin particles having a specific physical property is attached on the surface of a seed of a plant. As the specific physical property, the water-absorptive resin particles have a pure water absorbency (AAPw) of 60 to 200 [g / g] under application of a pressure of 2.07 kPa for 60 minutes.

Description

technical field [0001] The present invention relates to a granular water-absorbing agent for plant cultivation. More specifically, the present invention relates to a water-retaining agent for plant cultivation capable of being mixed with a culture medium and functioning as a water supply source for plants and a plant cultivation method using the water-retaining agent, and also relates to a water-retaining agent capable of suppressing the A plant seed composition in which low seed germination occurs due to lack of water. Background technique [0002] In recent years, hygienic products such as paper diapers, sanitary napkins, and incontinence pads have largely used water-absorbent resins as raw materials for their composition from the viewpoint of absorbing body fluids. Such water-absorbent resins include, for example, polyacrylic acid (salt)-based water-absorbent resins such as polyacrylic acid (salt)-based water-absorbent resins such as partially neutralized polyacrylic aci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G1/00A01G7/00A01C1/06C08L33/02
CPCA01G29/00C08L33/02A01G2009/1053A01G24/35
Inventor 松本诚加藤诚司北山敏匡柳濑透
Owner NIPPON SHOKUBAI CO LTD
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