Fully bio-degradable liquid mulching film

Abstract

The invention belongs to the technical field of soil chemical-covering mulching film of crops, particular relates to a fully bio-degradable liquid mulching film. The fully bio-degradable liquid mulching film is characterized in that the liquid mulching film is prepared from raw materials by weight percentage: 20-30 percent of staw liquid, 20-30 percent of humic acid, 10 percent of film-forming agent, 10 percent of stabilizer, 2 percent of surfactant and the rest of water. The production process is as follow: pressurizing and stewing staws in a solution of caustic soda, and adding the humic acid regenerated by natural weathered coal to be stewed for 60 minutes at 80 DEG C; and finally sequentially adding the film-forming agent, the stabilizer and the surfactant, and stirring and cooling to obtain the liquid mulching film. The liquid mulching film is in a colloidal state at normal temperature, and the liquid mulching film is diluted with water to be sprayed on the soil surface to become the film. The liquid mulching film has the functions of warming, preservation of soil moisture and water retention for humidification of a plastic mulching film and also has the function that the mulching film is automatically degraded to become a humic acid fertilizer to improve the soil aggregate structure.

Description

technical field

[0001] The invention belongs to the technical field of soil chemical covering film for crops, in particular to a fully biodegradable liquid film. Background technique

[0002] Plastic mulch is widely used in early coverage of crops in drought, cold and hilly areas, which can increase production by more than 20%. However, the use of plastic mulch has also caused "white pollution" of the environment, and the remaining plastic mulch has reduced the yield of crops. The use of plastic mulch also has the disadvantages of high labor intensity for artificial mulching, and the need to manually break the film when the seedlings grow. Liquid mulch is a new technology of soil chemical covering. Liquid mulch is in a colloidal state at room temperature. It is diluted with water and sprayed on the soil surface to form a film. It can be automatically degraded and turned into humic acid fertilizer to improve the soil aggregate structure. The labor efficiency of artificial...