PLA-based agricultural mulching film capable of preventing and controlling root-knot nematode and preparation method thereof

Abstract

The invention relates to a PLA-based agricultural mulching film capable of preventing and controlling a root-knot nematode and a preparation method thereof. The agricultural mulching film is a film formed by mixing a Chinese medicament effective component capable of preventing and controlling the root-knot nematode with a PLA-based copolymer, and the mass ratio of the Chinese medicament effectivecomponent capable of preventing and controlling the root-knot nematode to the PLA-based copolymer is (1-550):1,000. The powdered Chinese medicament effective component capable of preventing and controlling the root-knot nematode is used as a nucleating agent which is mixed with the PLA-based copolymer to prepare the agricultural mulching film, so the degree of crystallinity is changed, the obtained agricultural mulching film is easier to degrade, and the breaking elongation and the tensile strength of the agricultural mulching film are greatly enhanced. The agricultural mulching film is transparent or semi-transparent and has excellent anti-root-knot nematode performance, the fatality rate of over 90 percent and the degradation rate of over 90 percent after being placed in compost for sixmonths.

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. At present, the recovery rate of plastic film is low. Acc...

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