Resin coated fertilizer and preparation method thereof

Abstract

The invention discloses a resin coated fertilizer and a preparation method thereof. The resin coated fertilizer comprises the following raw materials in parts by weight: 10-12 parts of epoxy resin, 1-3 parts of polyethylene glycol, 3-5 parts of natural vegetable fat, 100-120 parts of urea, 8-10 parts of plagioclase powder and 3-5 parts of straw. Compared with other treatment processes, the processis matured; before the epoxy resin is used, polyethylene glycol and natural vegetable fat are mixed, so that the epoxy resin has degradability in the use process; after the slow release of the internally coated urea particles is completed, the coating film is also degraded as time goes on; the influence on the soil and the environment is reduced; meanwhile, crushed straw powder is doped into thesurface of the coating in the production process; after the straw powder enters the soil, a large amount of organic acid, enzyme and the like are generated in the fermentation process, so that the concentration of salt ions in the soil is reduced, the external vapor pressure of a coating is further improved, the slow release inhibition of salt on the resin coated fertilizer is reduced, the normalslow release of the coated fertilizer is ensured, and the use quality of the coated fertilizer is improved.

Description

technical field [0001] The invention relates to a fertilizer production process, and more specifically relates to a resin-coated fertilizer and a preparation method thereof. Background technique [0002] Coated fertilizer, also known as coated fertilizer, refers to a type of fertilizer that is coated with a layer of semi-permeable or insoluble film on the surface of water-soluble fertilizer particles, and has the characteristics of slowly releasing nutrients. There are many types of coating materials, mainly Sulfur, polymers, resins, paraffin, asphalt, etc. These film-forming substances are wrapped on the surface of water-soluble granular fertilizers to avoid direct contact between fertilizers and soil and crop roots. Water enters the film to dissolve nutrients and increase osmotic pressure. Promote the diffusion of nutrients to the soil solution through the film, or slowly release outwards through the small holes of the film, and be continuously absorbed and utilized by cro...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing coating fertilizer preparation methods are coated with phenolic resin, urea-formaldehyde resin, etc., and their resin degradability is average. When used, there is a problem that the film coating cannot be degraded after the slow release of fertilizer is completed, and the environmental protection is poor. There is a certain damage to the soil environment, and the coated fertilizer is usually mixed with ordinary fertilizers during the fertilization process. Salt will immediately reduce the vapor pressure outside the film, which greatly inhibits the release of resin-coated fertilizers, resulting in a slow release rate and affecting the quality of coated fertilizers. For this reason, we propose a resin-coated fertilizer and its preparation method