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Biodegradable agricultural mulching film capable of preventing and controlling root-knot nematodes and preparation method thereof

A root-knot nematode, agricultural mulching film technology, applied in botanical equipment and methods, chemicals for biological control, biocides, etc., can solve problems such as endangering human health, soil chemical residues, and polluting environmental crops, etc. Achieving good pest and disease resistance, inhibiting growth and saving time

Active Publication Date: 2010-08-18
山东秋水化学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional control method is to use chemical pesticides, but the use of pesticides has brought a large amount of chemical residues in the soil, seriously polluting the environment and crops, and endangering human health
In the 1980s, a large number of studies on plant-derived root-knot nematode active agents were carried out in foreign countries. In the early 1990s, my country systematically researched and reported plant-derived agents with nematicidal activity. However, there is no one that can effectively Environmentally friendly and chemical residue-free drugs for the prevention and control of root-knot nematodes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The first step is to wash, dry and pulverize the Chinese herbal medicine raw material of Fructus Cnidii, soak 1 mass part of the pulverized Chinese herbal medicine raw material of Cnidium Fructus with 1 mass part of absolute ethanol at room temperature for 20 hours, and then keep the temperature in a water bath at 80° C. for 3 hours; After suction filtration, the filtrate is concentrated and freeze-dried to obtain the active ingredient of the traditional Chinese medicine Cnidium monnieri in powder form.

[0023] In the second step, the biodegradable material polybutylene succinate (PBS) masterbatch is put into the internal mixer, and after the PBS masterbatch is completely melted, the Chinese herbal medicine of Cnidium mongolica with a mass percentage of 0.1% is added therein to be effective. The ingredients are uniformly mixed with PBS and then extruded in a single-screw extruder to blow the film. The thickness of the prepared agricultural mulch film is 0.003mm.

[002...

Embodiment 2

[0026] The first step is to wash, dry and pulverize the Chinese herbal medicine raw material of Fructus Cnidii, soak 10 parts by mass of the pulverized Chinese herbal medicine raw material of Fructus Cnidii with 25% acetone aqueous solution at room temperature for 1 hour, and place it in a water bath at 90° C. and constant temperature for 8 hours; after suction filtration, the filtrate was concentrated and freeze-dried to obtain the active ingredient of Cnidium monnieri in powder form.

[0027] In the second step, the biodegradable material PBS masterbatch is put into the internal mixer, and after the PBS masterbatch is completely melted, 7.5% mass percentage of Cnidium chinensis Chinese herbal medicine active ingredient is added therein, and after mixing with PBS evenly, the single screw The film is blown by extruding in the extruder, and the thickness of the produced agricultural mulching film is 0.005mm.

[0028] The effect of this embodiment is: the properties of the agric...

Embodiment 3

[0030] The first step is to wash, dry and pulverize the Chinese herbal medicine raw material of Fructus Cnidii, soak 1 mass part of the pulverized Chinese herbal medicine raw material of Cnidium Fructus with 25 mass parts of ether at room temperature for 8 hours, and then keep the temperature in a water bath at 40° C. for 2 hours; suction filter Finally, the filtrate is concentrated and freeze-dried to obtain the active ingredient of the traditional Chinese medicine of Fructus Cnidii in powder form.

[0031] In the second step, the biodegradable material PBS masterbatch is put into the internal mixer, and after the PBS masterbatch is completely melted, 20% mass percentage of Cnidium chinensis Chinese herbal medicine active ingredients are added therein, and after being mixed with PBS evenly, the single-screw The film is blown by extruding in an extruder, and the thickness of the produced agricultural mulching film is 0.007mm.

[0032] The effect of this embodiment is: the prop...

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Abstract

The invention relates to a biodegradable agricultural mulching film capable of preventing and controlling root-knot nematodes and a preparation method thereof. The agricultural mulching film is a thin film formed by mixing Chinese medicinal active ingredients capable of preventing and controlling root-knot nematodes with a PBS or PBS copolymer in a mass ratio of (1-500):1,000. In the invention, powder Chinese medicament active ingredients capable of preventing and controlling root-knot nematodes are used as nucleating agent to be mixed with the PBS or PBS copolymer to manufacture the mulching film, and the crystallinity is changed to make the manufactured agricultural mulching film more easily degradable and greatly improve the elongation at break and tensile strength of the agricultural mulching film. The agricultural mulching film has a transparent or semi-transparent property, high root-knot nematode prevention and control performance and over 90 percent lethality; and after the agricultural mulching film is placed in compost for 6 months, 80 percent of the agricultural mulching film can degrade.

Description

technical field [0001] The invention relates to an agricultural product, in particular to a biodegradable agricultural mulching film. Background technique [0002] Plastic film mulching is a mature agricultural cultivation technology, which can effectively increase and prolong the growth period of crops by retaining water and fertilizer, maintaining humidity, ensuring the increase of crop yield, and alleviating the problem of restricting agricultural production in China due to drought and water shortage. However, most of the agricultural film plastics currently used are high-molecular PE and PVC polymers, which have high crystallinity and melt index (MI). They are neither eroded by microorganisms nor decomposed by themselves in the soil, and their biodegradation cycle is generally several decades. In hundreds of years, toxic and harmful substances such as plasticizers will be dissolved during the degradation process. In addition, the current recovery rate of plastic film is...

Claims

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Application Information

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IPC IPC(8): A01G13/02A01N65/42A01N65/10A01N65/08A01N65/12A01P5/00
CPCY02A40/28
Inventor 张敏李成涛杨金明刘晟
Owner 山东秋水化学科技有限公司
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