Degradable composite water-preserving agent for greenhouse planting and preparation method of degradable composite water-preserving agent

Abstract

The invention discloses a degradable composite water-preserving agent for greenhouse planting. The degradable composite water-preserving agent is prepared from the following raw materials in parts by weight: 50 to 55 parts of crop straws, 40 to 55 parts of urea, 18 to 20 parts of ammonium dihydrogen phosphate, 22 to 25 parts of potassium persulfate, 10 to 15 parts of potassium sulfate, 16 to 18 parts of potassium chloride, 24 to 36 parts of acrylic acid, 50 to 80 parts of carboxymethyl cellulose, 6 to 10 parts of N,N-methylene bisacrylamide, 9 to 12 parts of polyvinyl alcohol, 30 to 50 parts of humic acid and 70 to 100 parts of acrylamide. The water-preserving agent disclosed by the invention has an excellent water regulating and controlling function; the degradable composite water-preserving agent can continuously supply water for a greenhouse to plant and grow; after the water-preserving agent absorbs water, the water-preserving agent becomes irregular gel particles; after the water-preserving agent is blended with dry material, the air permeability, the water permeability and the structural stability of a culture material are not affected; the problem that water replenishment is difficult at the later stage of greenhouse planting is solved; the water-preserving capability of the culture material is improved, and the yield of greenhouse planting is increased; meanwhile, the water-preserving agent disclosed by the invention has degradability, no pollution to the environment and better popularization value.

Description

technical field [0001] The invention relates to the field of water-retaining agent preparation, in particular to a degradable composite water-retaining agent for greenhouse planting and a preparation method thereof. Background technique [0002] The water-retaining agent uses superabsorbent resin, which is a functional polymer material with particularly strong water absorption capacity. Non-toxic and harmless, it releases and absorbs water repeatedly, so people in agriculture compare it to a "miniature reservoir". At the same time, it can also absorb fertilizers and pesticides and release them slowly to increase fertilizer and drug effects. Superabsorbent resins are widely used in agriculture, forestry, horticulture, and building materials; in industry, they can be widely used in petrochemicals, cables, papermaking, sensors, fire extinguishers, fiber products, cosmetics, food preservation, inflatable toys, etc. [0003] The existing water-retaining agents have the disadvan...

AI Technical Summary

Problems solved by technology

[0003] The existing water-retaining agents have the disadvantages of poor salt tolerance, low gel strength, and poor mildew resistance, while cellulose-based water-retaining agents have a low water absorption rate, and due to technical problems, it is difficult to realize industrial production