Degradable liquid mulch film and preparation method thereof

Abstract

The invention discloses a degradable liquid mulching film, comprising( by weight parts): asphaltum 300-450 parts, oil 15-25 parts, potassium hydroxide 3-10 parts, octadecyl alcohol 10-25 parts, OP-10 1.0-2.5 parts, sapn 80 1.0-2.5 parts, tween 85 3-10 parts, water 150-350 parts. The mulching film solves the pollution problem resulted from polyethylene mulching film used in drought, semiarid lands. The liquid mulching film is formed through spraying by general agricultural sprayer and drying, with function of preservating the soil moisture and heating. The film is broken without human when the plant seed emerges. The mulching film can be automatically degraded into fertilizer after 3-6 months to furnish the plant. The mulching film has great effects that wind proofing and fixing sand, avoiding water and soil loss, reducing the evaporation of water in soil, increasing ground temperature, promoting the growth of the cropper and success ratio of tree.

Description

technical field [0001] The invention belongs to the technical field of producing agricultural mulch, and relates to a liquid mulch, in particular to a degradable liquid mulch and a preparation method thereof. technical background [0002] Cultivation using plastic mulch is one of the widely used agricultural techniques. However, since the plastic mulch is difficult to decompose in the natural environment, it is scattered in the soil and the natural environment, difficult to degrade, destroys the soil structure, and causes white pollution to the soil and the environment. At the same time, the plastic mulch must be covered and pressed during use. , Artificial rupture of membranes and release of seedlings, etc., are laborious and time-consuming to operate. Therefore, in recent years, scientists have begun to study automatic degradable mulch films. Chinese Patent Publication No. CN1116635 proposes degradable mulch films. Its main raw materials are polyethylene resins, modified ...

AI Technical Summary

Problems solved by technology

However, since the plastic mulch is difficult to decompose in the natural environment, it is scattered in the soil and the natural environment, difficult to degrade, destroys the soil structure, and causes white pollution to the soil and the environment. At the same time, the plastic mulch must be covered and pressed during use. , manual rupture of membranes and release of seedlings, etc., the operation is laborious and time-consuming

Therefore, in recent years, scientists have begun to study automatic degradable mulch films. Chinese Patent Publication No. CN1116635 proposes degradable mulch films. Its main raw materials are polyethylene resins, modified starches, photosensitizers, oxidants, etc. Increase the income by 2 to 3 times, it is not easy to promote from the economic point of view

[0003] Chinese Patent Publication Nos. CN1088229 and CN1114327 propose a kind of mulch film with polyvinyl alcohol as the main raw material, which is sprayed on the ground surface after being dissolved in water on site to form a film, which is characterized in that it is degradable and avoids white pollution, but its degradation The effect is poor, and the utilization rate after degradation is low

However, because of the poor emulsification performance of the selected surfactant, the dosage is large, the cost is high, and the product stability and film-forming property are poor, so it is difficult to popularize and apply.

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