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A method for preventing and controlling the phytotoxicity of crops by carbon nanotubes by residual herbicides

A carbon nanotube and multi-wall carbon nanotube technology, applied in the field of herbicides, can solve problems such as phytotoxicity, and achieve the effects of crop growth promotion, strong adsorption capacity, and good repair effect

Active Publication Date: 2022-06-21
HUNAN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Quinclorac is a commonly used herbicide for rice. It has a good control effect on barnyard grass, but it is easy to cause phytotoxicity to sensitive crops such as Solanaceae and Cucurbitaceae.

Method used

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  • A method for preventing and controlling the phytotoxicity of crops by carbon nanotubes by residual herbicides
  • A method for preventing and controlling the phytotoxicity of crops by carbon nanotubes by residual herbicides
  • A method for preventing and controlling the phytotoxicity of crops by carbon nanotubes by residual herbicides

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. The adsorption of MWCNTs to sulfentrazone / quinclorac is detected, and an adsorption isotherm is established; it specifically includes the following steps:

[0035] 1) Prepare standard solution of sulfentrazone: 2, 4, 8, 16, 32mg / L, standard solution of quinclorac: 0.1, 0.4, 1.6, 6.4, 25.6mg / L, set 3 repetitions for each concentration, Measure the peak area with a high performance liquid chromatograph, and establish a concentration-peak area coordinate system;

[0036] The chromatographic detection conditions for sulfentrazone are:

[0037] Column: 4.6mm(id)×250mm, Eclipse XDB-C18, particle size 5μm)

[0038] Mobile phase: methanol: water (0.1% formic acid) = 70:30

[0039] Flow rate: 1mL·min -1

[0040] Detection wavelength: 240nm

[0041] Injection volume: 10μL

[0042] Column temperature: 30℃

[0043] According to the regression equation fitted by the results of HPLC detection, Y represents the peak area, x represents the concentration of sulfentrazone,

[...

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Abstract

The invention relates to a method for preventing and controlling the phytotoxicity of crops caused by residual herbicides by carbon nanotubes, comprising the following steps: S1, measuring the adsorption of herbicides by adding carbon nanotubes in soil, and establishing an adsorption isotherm; S2, establishing the relationship between herbicides and crops The dose-effect relationship of phytotoxicity; S3, based on the adsorption and herbicide dose, calculate the amount of carbon nanotubes used to repair herbicide phytotoxicity; S4, add carbon nanotubes to the herbicide-contaminated soil, and then plant crops, Control herbicide damage and promote crop growth.

Description

technical field [0001] The invention relates to the technical field of herbicides, and more particularly, to a method for preventing and controlling phytotoxicity of crops by residual herbicides by carbon nanotubes. Background technique [0002] Globally, herbicides are the most commonly used pesticides, accounting for about 40% of pesticide use. Some herbicides that remain in the soil for a long time, usually for 2-3 years, can easily cause damage to subsequent crops and cause serious losses to agricultural production. Therefore, the prevention and control of pesticide pollution, especially herbicide pollution is the key to ensure crop yield. Sulfentrazone can damage the cell membrane by inhibiting protoporphyrin oxidase in the process of chlorophyll biosynthesis, causing the leaves to dry up and die rapidly. Sulfentrazone has a broad herbicidal spectrum and can control annual broad-leaved weeds, grass weeds and sedges. High-efficiency and low-toxicity new pre-emergence ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01B79/02A01G22/22A01G22/05A01G22/45G01N30/88B09C1/00
CPCA01B79/02A01G22/22A01G22/05A01G22/45G01N30/88B09C1/105G01N2030/8809
Inventor 刘开林谭硕姚婷柏连阳刘祥英胡利锋罗坤刘敏潘浪
Owner HUNAN AGRICULTURAL UNIV
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