Leaf surface spraying agent, preparation method thereof, and method for controlling content of cadmium in rice

A foliar spraying and surfactant technology is applied in the field of controlling cadmium content in rice. The foliar spraying agent can solve the problems of high repair cost and long repair period, and achieve low cost, reduce cadmium content, and increase the ratio of cadmium. The effect of surface area

Active Publication Date: 2016-06-01
SHENZHEN TECHAND ECOLOGY & ENVIRONMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they are all faced with problems such as high repair costs or long repair cycles. Find a way to directly control the ability of crops to transport and accumulate Cd ions, and develop a method that can prevent and control the absorption of cadmium by rice and directly reduce the cadmium content in rice. The rice foliar spray has very important significance and has a very good application prospect

Method used

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  • Leaf surface spraying agent, preparation method thereof, and method for controlling content of cadmium in rice
  • Leaf surface spraying agent, preparation method thereof, and method for controlling content of cadmium in rice

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 20g of microsilica powder and grind it through a 600-mesh sieve, that is, the particle size of the microsilica powder is ≤23μm; add the microsilica powder into a beaker filled with 1000mL of ultrapure water, place the beaker in a constant temperature ultrasonic instrument, and place it in a water bath at 30°C Sonicate for 30 minutes; then add 5.0g (3-mercaptopropyl)-trimethoxysilane, continue ultrasonication in a water bath for 5 minutes; take it out, place the beaker on a constant temperature magnetic stirrer, add a stir bar, and stir at 60°C for 2 hours; after cooling , add 5.0g of ethanol, 0.5g of Tween 80 and 50mg of sodium hydrosulfide, stir evenly to get the foliar spray.

Embodiment 2

[0026] Weigh 50g of microsilica powder and grind it through a 600-mesh sieve, that is, the particle size of the microsilica powder is ≤23μm; add the microsilica powder into a beaker filled with 1000mL ultrapure water, place the beaker in a constant temperature ultrasonic instrument, and place it in a water bath at 30°C Sonicate for 1 hour; then add 20.0g (3-mercaptopropyl)-trimethoxysilane, and continue ultrasonication in a water bath for 10 minutes; take it out, place the beaker on a constant temperature magnetic stirrer, add a stir bar, and stir at a constant temperature of 60°C for 2.5 hours; cool Finally, add 20g of acetone, 1g of Silwet408 and 100mg of sodium hydrosulfide, and stir well to obtain the foliar spray.

Embodiment 3

[0028] Weigh 1g of microsilica powder and grind it through a 600 mesh sieve, that is, the particle size of the microsilica powder is ≤23μm; add the microsilica powder into a beaker filled with 1000mL ultrapure water, place the beaker in a constant temperature ultrasonic instrument, and place it in a water bath at 30°C Sonicate for 30 minutes; then add 0.5g (3-mercaptopropyl)-trimethoxysilane, and continue to sonicate in a water bath for 10 minutes; take it out, place the beaker on a constant temperature magnetic stirrer, add a stir bar, and stir at a constant temperature of 60°C for 2.5h; cool Finally, add 0.5g of propylene glycol, 0.05g of Tween 20 and 10mg of sodium hydrosulfide, and stir evenly to obtain a foliar spray.

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Abstract

The invention discloses a leaf surface spraying agent, a preparation method thereof and a method for controlling the content of cadmium in rice. The leaf surface spraying agent comprises 1 to 50 mass parts of silica micropowder, 0.5 to 20 mass parts of (3-mercaptopropyl)trimethoxysilane, 0.01 to 0.1 mass part of isothiocyanate, 0.5 to 20 mass parts of cosolvent, 0.05 to 1 mass part of surfactant and 1000 mass parts of water. The silica micropowder in the leaf surface spraying agent can inhibit the transfer of the cadmium to the rice; the (3-mercaptopropyl)trimethoxysilane can reduce the agglomeration of SiO2 in water so as to increase the specific surface area of the SiO2, and meanwhile, active groups, such as mercapto group, contained in the (3-mercaptopropyl)trimethoxysilane are favorable to complexing heavy metals and reducing the heavy metal absorption of the rice; the isothiocyanate can release H2S, and an exogenous H2S signal has a regulating effect on the physiological process of a plant and can reduce the cadmium absorption of the rice; by combining and using the silica micropowder, the (3-mercaptopropyl)trimethoxysilane and the isothiocyanate in the leaf surface spraying agent, the content of cadmium in the rice can be remarkably reduced; moreover, the leaf surface spraying agent is convenient to use, low in cost, and convenient to popularize and apply.

Description

technical field [0001] The invention relates to the technical field of heavy metal pollution control, in particular to a foliar spray, a preparation method thereof and a method for controlling cadmium content in rice. Background technique [0002] Cadmium is a highly toxic heavy metal, and most of its compounds are toxic substances. Due to the mining and smelting of metal ores, sewage irrigation, utilization of industrial waste residue, sludge, and urban waste, and application of chemical fertilizers and pesticides, cadmium pollution in my country's farmland is becoming increasingly serious. The harm caused by soil cadmium pollution to human body is indirect. It enters the human body through the enrichment of the food chain, causing serious harm to human health. After being absorbed by the human body, cadmium is mainly stored in the liver and kidney, causing kidney function damage and lung damage, leading to renal cortex necrosis, renal tubular damage, emphysema and pulmona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/02A01N59/00A01N59/06A01N25/30A01P21/00A01G7/06
CPCA01G7/06A01N25/30A01N59/00A01N59/02A01N59/06A01N2300/00
Inventor 黄雷张时伟林晓燕裴东辉刘登彪龚亚龙许闯李红艳
Owner SHENZHEN TECHAND ECOLOGY & ENVIRONMENT CO LTD
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