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Chitosan-loaded silicon oxide leaf surface regulating agent as well as preparation method and application thereof

A chitosan and silicon oxide technology, applied in the fields of botanical equipment and methods, applications, plant growth regulators, etc., can solve the problems of low silicon conversion rate, crop damage, and high silicon content, achieve high activity, improve resistance to Sickness, good adsorption effect

Pending Publication Date: 2022-05-13
生态环境部华南环境科学研究所(生态环境部生态环境应急研究所)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been reported in the literature that modified chitosan nanomaterials are mostly used in the research of disease resistance and stress resistance of rice foliar spraying, but there is no report on the use of modified chitosan in the absorption of arsenic-contaminated rice in farmland. Therefore, in It has important research significance to apply modified chitosan to detoxify rice by spraying modified chitosan on leaves
[0006] At present, there are many patents on foliar fertilizers, but most of the silicon-rich foliar fertilizers on the market have the following problems. First, the silicon content is high, and silicon itself has a potential risk of toxicity. Second, agricultural products The conversion rate of silicon is low and the cost is high; the third is that the use of foliar fertilizers has the risk of burning seedlings on the plants themselves, and excessive application of doses will cause damage to crops, and the safety is poor

Method used

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  • Chitosan-loaded silicon oxide leaf surface regulating agent as well as preparation method and application thereof
  • Chitosan-loaded silicon oxide leaf surface regulating agent as well as preparation method and application thereof
  • Chitosan-loaded silicon oxide leaf surface regulating agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Weigh 6g chitosan and dissolve it in 3% 150mL acetic acid solution, heat and stir in a water bath at 50°C to dissolve, slowly add 100mL 4% H 2 o 2 The solution was heated to 65°C, stirred for 6h, taken out and cooled to 30°C. Adjust the pH to 8, let it stand for 8-12 hours, add 450mL of 25% ethanol solution to the filtrate after suction filtration, let it stand for 1 hour, and obtain yellow or light yellow solid particles after freeze-drying the centrifuged product;

[0043] (2) First, mix 50mL of protective agent and 5mL of catalyst and seal it with a parafilm, stir magnetically for 1-3h, the stirring temperature is 40°C, and the stirring speed is 300r·min -1 , to obtain the mixture, then 1.05mL tetraethyl orthosilicate was added dropwise to the mixture, sealed with a parafilm and stirred for 5h, the stirring temperature was 40°C, and the stirring speed was 300r·min -1 , add 80mL deionized water to the mixture, stir it magnetically for 6h, the stirring temperatur...

Embodiment 2

[0046] (1) Weigh 6g chitosan and dissolve it in 3% 150mL acetic acid solution, heat and stir in a water bath at 40°C to dissolve, slowly add 100mL 4% H 2 o 2 The solution was heated to 55°C, stirred for 3h, taken out and cooled to 25°C. Adjust the pH to 7, let it stand for 8 hours, add 450 mL of 25% ethanol solution to the filtrate after suction filtration, let it stand for 1 hour, and obtain yellow or light yellow solid particles after freeze-drying the centrifuged product;

[0047] (2) First, mix 50mL of protective agent and 5mL of catalyst and seal it with a parafilm, stir magnetically for 1-3h, the stirring temperature is 40°C, and the stirring speed is 300r·min -1 , to obtain the mixture, then 1.05mL tetraethyl orthosilicate was added dropwise to the mixture, sealed with a parafilm and stirred for 3h, the stirring temperature was 40°C, and the stirring speed was 300r·min -1 , add 80mL deionized water to the mixture, stir it magnetically for 4h, the stirring temperature ...

Embodiment 3

[0050] (1) Weigh 6g chitosan and dissolve it in 3% 150mL acetic acid solution, heat and stir in a water bath at 45°C to dissolve, slowly add 100mL 4% H 2 o 2 The solution was heated to 60°C, stirred for 4h, taken out and cooled to 25°C. Adjust the pH to 7, let it stand for 10 hours, add 450 mL of 25% ethanol solution to the filtrate after suction filtration, let it stand for 1 hour, and obtain yellow or light yellow solid particles after freeze-drying the centrifuged product;

[0051] (2) First, mix 50mL of protective agent and 5mL of catalyst and seal it with a parafilm, stir magnetically for 1-3h, the stirring temperature is 40°C, and the stirring speed is 300r·min -1 , to get the mixture, then 1.05mL tetraethyl orthosilicate was added dropwise to the mixture, sealed with parafilm and stirred for 3-5h, the stirring temperature was 40°C, and the stirring speed was 300r·min -1 , add 80mL deionized water to the mixture, stir it magnetically for 5h, the stirring temperature is...

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Abstract

The invention discloses a chitosan-loaded silicon oxide leaf surface regulating agent as well as a preparation method and application thereof, and belongs to the field of farmland heavy metal pollution safety production. According to the preparation method, the silicon-rich green leaf surface regulating agent which is high in activity, safe and efficient is prepared by adopting nano-scale chitosan loaded silicon oxide prepared from natural biomass chitosan and organic silicon and taking chitosan as a carrier. The preparation method is simple in process and low in production cost, the prepared product is stable in performance, and the product is semitransparent or transparent sol and can be widely applied to improvement of arsenic absorption and accumulation of rice leaves, reduction of the arsenic enrichment level of edible parts, better protection of body health of people and obtaining of better social and economic benefits.

Description

technical field [0001] The invention relates to the technical field of safe production of farmland heavy metal pollution, and more specifically relates to a chitosan-loaded silicon oxide foliage regulator and its preparation method and application. Background technique [0002] The problem of heavy metal pollution in cultivated land soil in my country has become increasingly serious. According to statistics, the area of ​​polluted cultivated land is nearly 150 million mu, and the annual grain output due to soil pollution is as high as 12 million tons, and the direct economic loss is more than 20 billion yuan. Arsenic (As), a metalloid present in the natural environment, poisons and accumulates in plants, and poses environmental and health risks through the food chain. Rice (Oryza sativa L.) is the main food crop for billions of people. Human consumption of rice with excessive accumulation of As can cause a series of acute and chronic diseases, such as cardiovascular, nervou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/00A01N43/16A01N25/10C05G3/00A01P21/00
CPCA01N59/00A01N43/16A01N25/10C05D9/00C05G3/00C05D9/02
Inventor 孙梦强陈志良杨嘉仪肖羽堂黄玲韦行邹奇
Owner 生态环境部华南环境科学研究所(生态环境部生态环境应急研究所)