Environment-friendly coated slow release fertilizer preventing pest and disease damage and preparation method thereof

Abstract

The invention discloses an environment-friendly coated slow release fertilizer preventing pest and disease damage and a preparation method thereof. The environment-friendly coated slow release fertilizer is characterized by being prepared from the following raw materials in parts by weight: 0.5-1.5 parts of diallyl disulfide, 10-20 parts of acrylic acid, 30-50 parts of sodium alginate solution, 3-5 parts of donkey bone powder, 1-2 parts of ammonium persulfate, 3-6 parts of N,N-methylene bisacrylamide, 0.5-1 part of diallyl trisulfide, 15-25 parts of polyvinyl alcohol, 3-5 parts of starch, 25-35 parts of urea, 8-15 parts of potassium hydrogen phosphate, 40-50 parts of calcium chloride solution and 50-100 parts of distilled water. In the invention, by adding a water retaining agent into crosslinking liquid and spraying on the fertilizer core, the defect that a water retaining agent easily falls when the water retaining agent is directly adhered to the fertilizer core is overcome, and the water retaining effect of the fertilizer is remarkable; meanwhile, the crosslinking liquid also can realize an aim of enhancing the water resistance of the fertilizer and is easily biodegradable; and through the compounding of the raw materials, the pest and disease damage of crops can be effectively prevented, and the soil is purified.

Description

technical field [0001] The invention relates to a slow-release fertilizer, in particular to a preparation method of an environment-friendly coated slow-release fertilizer for preventing pests and diseases. [0002] technical background [0003] Coated slow / controlled release fertilizer is based on granular chemical fertilizer, and the surface is coated with a layer of slightly water-soluble inorganic or organic polymer, which can change the release characteristics of fertilizer nutrients, prolong or control the release of fertilizer nutrients, A new type of fertilizer that coordinates the release of nutrients with the fertilizer requirements of crops. The development of this kind of fertilizer has put forward new ideas for improving fertilizer utilization rate, reducing environmental pollution, and developing labor-saving and labor-saving modern agriculture. Therefore, researchers in fertilizer science, soil science, environmental science, chemistry and other disciplines hav...

AI Technical Summary

Problems solved by technology

[0004] Ni Boli prepared a water-retaining slow-release fertilizer by using sodium alginate and polyacrylic acid in his postgraduate dissertation "Preparation and Performance Research of Environmentally Friendly Multifunctional Slow- and Controlled-Release Fertilizer", but there are still water-retaining agents that are easy to fall off, including The water resistance of the membrane needs to be improved, and the slow release performance is not good.