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Cold-resistant agent for rice and preparation method thereof

An anti-cold agent, rice technology, applied in the fields of botanical equipment and methods, biocides, animal repellants, etc., can solve the problems of unpredictable cold weather, complicated operations, expensive products, etc., and achieve social and ecological benefits. Obviously, the cold resistance effect is obvious, the effect of improving the cold resistance ability

Active Publication Date: 2016-01-13
HUNAN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Rice cold damage occurs in early spring and late autumn. During the sowing and seedling raising period of early, middle rice and northern rice in southern my country, low temperature (cold in late spring) is often encountered, resulting in a large number of rotten seedlings and dead seedlings; Affect rice photosynthesis and material transportation, resulting in empty grains and reduced yield; this has brought huge losses to rice production
[0004] At present, rice production in my country mainly adopts plastic film mulching, or uses cold-resistant preparations made of abscisic acid and salicylic acid as cold-resistant ingredients to prevent and control cold damage. Although these methods have certain cold-proof effects, the former is complicated to operate and costs It is relatively high, and it is difficult to predict when the cold weather will occur, and effective measures cannot be taken in time; the latter uses expensive chemical components such as abscisic acid and salicylic acid, and the product price is expensive and the cost of use is high, so it is difficult to promote it on a large scale

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh 40Kg of the roots that have been removed, dried, and crushed to 40-50 meshes, add 280Kg of water, and extract at 85°C for 1.2 hours; The second extraction solution is concentrated at 70°C to 40Kg to obtain the anti-cold component—the root extract of Radix Radix.

[0035] According to the formula requirements, put 1.2Kg of hydroxyethyl chitin into a dissolving kettle with stirring and interlayer heating, pump 56.75Kg of water and 40Kg of Fangfeng root extract in sequence with a metering pump, and stir at 38-45°C to make hydroxyethyl chitin Chitin is completely dissolved; then put 2Kg of emulsifier 0P-10 and 0.05Kg of potassium sorbate into the dissolution kettle in turn, stir at 38-45°C, mix well, cool to 25°C, and fill with liquid quantitative filling machine , that is, rice cold resistance agent.

Embodiment 2

[0037] Weigh 43Kg of the roots that have been removed, dried, and pulverized to 40-50 meshes, add 344Kg of water, and extract at 90°C for 1 hour; For the second extract, concentrate the extract to 43Kg at 70°C, that is, the anti-cold component-the root extract of Fangfeng.

[0038] According to the formula requirements, put 1Kg of hydroxyethyl chitin into a dissolving kettle with stirring and interlayer heating, pump in 54.43Kg of water and 43Kg of Fangfeng root extract in sequence with a metering pump, and stir at 38-45°C to make the hydroxyethyl chitin Chitin is completely dissolved; then put 1.5Kg of emulsifier 0P-10 and 0.07Kg of potassium sorbate into the dissolution kettle in turn, stir at 38-45°C, mix well, cool to 25°C, and fill with liquid quantitative filling machine , that is, rice cold resistance agent.

Embodiment 3

[0040] Weigh 45Kg of the roots that have been removed, dried, and pulverized to 40-50 meshes, add 292.5Kg of water, and extract at 80°C for 1.5 hours; Extract 4 times, concentrate the extract to 45Kg at 70°C, that is, the anti-cold component-the root extract of Fangfeng.

[0041] According to the formula requirements, put 0.8Kg of hydroxyethyl chitin into a dissolving kettle with stirring and interlayer heating, pump 53.14Kg of water and 45Kg of Fangfeng root extract in sequence with a metering pump, and stir at 38-45°C to make hydroxyethyl chitin Chitin is completely dissolved; then put 1Kg of emulsifier 0P-10 and 0.06Kg of potassium sorbate into the dissolution kettle in turn, stir at 38-45°C, mix well, cool to 25°C, and fill with liquid quantitative filling machine , that is, rice cold resistance agent.

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Abstract

The invention relates to a cold-resistant agent for rice and a preparation method thereof. According to the invention, the extract of radix saposhnikoviaeis used as a cold-resistant component; an adhesion agent, an emulsifier, a preservative and a solvent are added; and through extraction of the cold-resistant component, and mixing and dissolving of the above-mentioned components, the cold-resistant agent is prepared. The agent is suitable for seed dressing or foliage spraying of the rice, and alleviation of harm on growth of the rice due to cold wave and low temperature. The cold-resistant agent provided by the invention is used for seed dressing according to a weight ratio of the cold-resistant agent to seeds of 1: 50, or for foliage spraying according to the weight ratio of the cold-resistant agent to water of 1: 350 after blended with water; and the agent has a cold-resistant effective duration period of up to 18 to 22d for seed dressing, and a cold-resistant effective duration period of up to 7 to 9d for foliage spraying. The cold-resistant agent for the rice provided by the invention has the advantages of simple production, low cost, convenient use, significant cold-resistant effect, environmental friendliness, and good economic benefits, social benefits and ecological benefits.

Description

technical field [0001] The invention relates to a rice anti-cold agent for alleviating the harm of cold wave and low temperature on rice growth and a preparation method thereof, belonging to the technical field of crop cultivation. Specifically, it is a rice cold resistance agent, which is suitable for rice seed dressing or foliar spraying, and reduces the harm of cold wave and low temperature to rice growth. Background technique [0002] Chilling injury is a serious natural disaster for crops, which can affect the growth and metabolism of crops, cause the physiological activities of crops to be hindered, cause crops to be injured and reduce production, and in severe cases, crops will die. Global crop losses due to low temperature and cold are as high as hundreds of billions of dollars every year. [0003] Rice is the largest food crop in my country, and it is widely planted in various provinces, with an area of ​​440 million mu, and its output is close to 50% of the total ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N65/10A01P21/00A01C1/06
Inventor 熊远福黄敏邹应斌王锦文祝友熊海蓉文卓琼
Owner HUNAN AGRICULTURAL UNIV
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