Smectite-humic acid multifunctional degradable liquid mulch film

Abstract

The invention provides a smectite-humic acid multifunctional degradable liquid mulch film which is prepared by the following steps: modifying smectite and humic acid to form high polymers under the actions of a crosslinking agent and a film former; and mixing with various additives, silicon fertilizer, microelements, pesticide and weedicide to obtain the multifunctional degradable black liquid mulch film. The smectite-humic acid multifunctional degradable liquid mulch film comprises the following components in percentage by weight: 30-50% of humic acid, 15-30% of smectite, 1-10% of sodium hydroxide or potassium hydroxide, 2-8% of crosslinking agent, 10-25% of film former, 5-10% of water glass, 1-3% of micro-fertilizer, 0.1-2% of bactericide and 0.1-2% of weedicide. The mulch film solves the problem of pollution caused by the use of the plastic mulch film in agriculture. The liquid mulch film is sprayed by a common agroatomizer onto the ground surface, and forms a film after being dried. The mulch film can hold the temperature and moisture of soil, prevent ground surface evaporation, enhance the sprouting speed of the plant, protect the fertilizer, reduce the nutrient loss and keep soil from packing together. In particular, after the crops are harvested, the product can quickly be degraded in soil, and have the effects of providing the plant nutrients and improving the soil environment.

Description

1. Technical field [0001] The invention provides a montmorillonite and humic acid multifunctional and degradable liquid mulch film, which belongs to the field of agricultural production application. 2. Background technology [0002] The use of plastic mulch cultivation technology is one of the top ten agricultural technologies well known in this century. The use of mulch can meet the needs of crops for heat preservation, moisture protection, frost protection, and fertility maintenance. However, after years of use, plastic mulch is difficult to decompose in the natural environment. Broken, difficult to recycle, scattered in the natural environment, causing serious white pollution to the soil and the environment. Therefore, in agricultural production, there is an urgent need for a plastic mulch substitute that not only has the effect of plastic mulch heat preservation, but also reduces the evaporation of soil moisture and does not produce ecological pollution. Degradable mulc...

AI Technical Summary

Problems solved by technology

Among them, the multifunctional degradable liquid mulch film mentioned in the CN1277228 patent mainly uses petroleum asphalt or residual oil as raw material, the cost is high, and the source of raw material is limited to a certain extent. In addition, when the material is diluted, it is easily emulsified by hard water, resulting in a decrease in film-forming property; CN1209443 The mentioned spraying invisible mulching film is hydroxychlorobutanol latex resin solution, and a kind of multi-kinetic degradable mulching film mentioned in CN1935878A is a mixed solution of polyvinyl alcohol, acrylic acid and starch. The cost of both is higher and the degradability is poor. CN1459471A propose The multifunctional degradable black liquid mulch film is a degradable liquid mulch film, which has the functions of heat preservation, moisture conservation, seedling preservation and soil improvement. The application effect is equivalent to that of plastic mulch, but there are problems such as poor control of film forming strength.

The above-mentioned invention patents avoid "white pollution" to a certain extent, but generally have disadvantages such as poor film formation, low toughness, low water resistance, poor heat preservation, and delayed emergence of crops, which have certain limitations on use and promotion.