A soil and water conservation degradable liquid mulch film and its preparation and application

Abstract

The invention belongs to the field of agriculture and forestry application, and particularly relates to a water and soil conservation type degradable liquid mulching film and preparation and application thereof. The water and soil conservation type degradable liquid mulching film is specifically prepared from, by weight, 14%-16% of polyvinyl alcohol, 2%-4% of silica sol, 3%-10% of calcium lignosulphonate, 3%-5% of cross-linking agents, 1%-2% of defoaming agents, 1%-3% of soluble starch, 4%-5% of Twain (80), 1%-3% of glycerin, 1%-2% of blade dye and the balance water. According to the mulching film, the defects that an existing liquid mulching film on the market is poor in film-forming property and tensile strength, high in moisture permeability, prone to being damaged after being formed on the soil surface and unobvious in spraying effect are overcome; a liquid mulching film stock solution is diluted with water, fully stirred and then sprayed on the soil surface of planted land, the nanometer materials of the solution can effectively fill the binding positions of macromolecular hydrophilic groups and active sites on soil particles, and the surface-layer soil particles are bonded on the soil surface to form a black dense special soil film structure.

Description

technical field [0001] The invention belongs to the application field of agriculture and forestry, in particular to a soil and water conservation degradable liquid mulch film and its preparation and application. Background technique [0002] Different degrees of soil drought have different effects on afforestation and grass planting on slopes. Severe soil moisture deficit is an important factor limiting the normal growth and development of forest and grass in semi-arid areas. Surface covering can effectively inhibit the evaporation of soil moisture, maintain soil moisture, and benefit the growth and development of forest and grass. As a new type of biodegradable mulch, soil and water conservation liquid mulch can not only effectively maintain soil moisture, improve soil structure, and promote the growth of forest and grass, but also has the advantages of simple application, strong adaptability, and no pollution. etc. also have good effects. Therefore, the development and a...

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Problems solved by technology

[0003] At present, there are many patents on the production of liquid mulch, but all of them have problems, such as CN1357569A, whose functional component is vinyl acetate solution, and CN1935878A, which uses acrylic acid as the main component, all of which are flammable, harmful to human health, and difficult to apply on a large scale ; CN101445731A, CN101007903 because the main components are humic acid or lignin, the film-forming effect is not good, and the action time is restricted by external factors

However, some existing products on the market also have many problems, such as poor film-forming properties, poor tensile strength, high moisture permeability, and easy damage on the soil surface, and are only suitable for flat land. It is not suitable for application in barren hills greening and afforestation

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