A kind of degradable agricultural mulch film and preparation method thereof

Abstract

The invention relates to a degradable agricultural mulch film and a preparation method thereof. The mulch film is composed of a filler and a waste fiber base network, and the whole is distributed in a density gradient in the vertical direction, and the fibers are formed in a "parallel + vertical" interlaced mixed structure. network. The invention can keep warm and keep moisture after sowing, improve the survival rate of crop emergence, and has obvious effect of suppressing weeds; after use, no special treatment is required, and it can be naturally degraded, or can be directly plowed in the soil, without affecting the next round The planting and growth of crops; not only can be directly used for the growth of crops in the current season, but also can be used in forest and fruit gardening to suppress weeds, promote the effective use of water and fertilizer, and adjust soil structure, especially for saline-alkali soils; due to the use of waste fiber, so The raw materials are easy to obtain and the cost is low.

Description

technical field [0001] The invention belongs to the field of agricultural production, and in particular relates to a degradable agricultural mulch film and a preparation method thereof. Background technique [0002] The use of agricultural mulch film has brought many benefits to agricultural production, such as shortening the growth cycle and increasing yield by increasing temperature, preserving moisture, and suppressing weeds. However, after the crop growing season ends, the mulch film neither degrades nor can be completely recycled, resulting in "white pollution" of residual film remaining in the field, and has a greater impact on the next round of crop growth and the suitability of the soil for long-term cultivation. Such as inhibiting the growth of crop roots, causing soil compaction and so on. [0003] In order to change this situation, degradable mulch is often used as an alternative product. However, there are still three key problems in this kind of products: one ...

AI Technical Summary

Problems solved by technology

However, there are still three key problems in this kind of products: one is the problem of raw materials and cost, the other is the problem of agricultural production effect, and the third is the problem of degradation performance and the impact of degradation products on the environment.

For example, in the first category, the common problems of the degradable mulches of the three plastic blown films are difficult processing, poor mechanical properties, and difficult to control the degradation rate. The key is that the small particles after degradation cannot be removed, and there may be secondary pollution. Hidden dangers

The paper mulch in the second category has poor wind and rain resistance, is easily broken, and is not suitable for mechanical film laying; the problem of liquid mulch is that it degrades quickly and has poor thermal insulation effect; The effect is not significant, etc.; the problem of non-woven mulch is that it has a large air permeability and is easy to evaporate water vapor, making its moisture retention and heat preservation effect worse than that of the current PE film

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