Fully-degradable agricultural biological intelligent mulching film and preparation method therefor

Abstract

The invention discloses a fully-degradable agricultural biological intelligent mulching film and a preparation method therefor. The fully-degradable agricultural biological intelligent mulching film comprises 0.5-1.5 parts of modified starch, 0.6-1 parts of polyvinyl alcohol, 0.4-0.8 parts of emulsifier, 0.3-0.7 parts of carboxymethyl cellulose, 0.2-0.4 parts of PH regulator, 0.2-0.4 parts of natural latex and 95.2-97.8 parts of distilled water in a weight ratio. The prepared fully-degradable agricultural biological intelligent mulching film can replace agricultural plastic mulching films usedin agricultural production at present, and the intelligent mulching film can be fully degraded within nine months after being sprayed onto farmland surfaces, does not need to be recycled, has no residue and is pollution-free.

Description

【Technical field】 [0001] The invention relates to the technical field of mulch, in particular to the technical field of a fully degradable agricultural biological intelligent mulch and a preparation method thereof. 【Background technique】 [0002] In order to keep heat and moisture in the farmland, shorten the fruit maturity period, and increase the unit yield, my country introduced plastic mulch for agricultural production in the early 1980s. At present, agricultural plastic mulching technology has become an important measure for drought resistance, water saving and crop production increase in my country's alpine, arid, semi-arid, low-lying and saline-alkali regions, especially in my country's vast northwestern and northeastern regions. At present, the covered area of ​​plastic film in my country has reached 250 million mu, and it is increasing at a rate of 10 million mu every year. The total annual use of plastic film has exceeded 450,000 tons, ranking first in the world. ...

AI Technical Summary

Problems solved by technology

However, agricultural plastic mulches have the following disadvantages: 1. When crop seeds germinate, the plastic film cannot be broken through, and holes need to be artificially opened, resulting in high labor costs; 2. Plastic mulches are not breathable after use, and can no longer absorb natural precipitation, which increases the impact on farmland. Land moisture is ineffective; 3. It needs to be recycled after use, and if some plastic debris is not recycled cleanly, it will easily remain in the farmland and cause "white pollution"; 4. Recycling old plastic mulch requires man-hour costs, and reprocessing of recycled materials is also high cost

Due to the above obvious defects, it is difficult to promote various types of liquid films on the market at present, and cannot replace agricultural plastic mulch films, and none of them has been widely recognized by the market and promoted on a large scale.

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