Self-assembly and self-repair coated controlled-release fertilizer with loaded functional substances and method for preparing self-assembly and self-repair coated controlled-release fertilizer

Abstract

The invention discloses a self-assembly and self-repair coated controlled-release fertilizer with loaded functional substances and a method for preparing the self-assembly and self-repair coated controlled-release fertilizer. The method includes loading repair agents and the functional substances in hollow or mesoporous nanometer materials, then wrapping self-assembly materials with the nanometermaterials and allowing the self-assembly materials to be slowly released; adding loaded nanometer materials into coating base solution to obtain coating materials; coating fertilizer granules to obtain the self-assembly and self-repair coated controlled-release fertilizer. The self-assembly and self-repair coated controlled-release fertilizer and the method have the advantages that the coating materials can be reduced by 40-60% under the condition of identical release periods, accordingly, the cost can be lowered, and the self-assembly and self-repair coated controlled-release fertilizer and the method are environmentally friendly and are high in efficiency; the repair agents are added into the self-assembly and self-repair coated controlled-release fertilizer, pores in membrane materialscan be repaired at early stages, and release curves are smooth and steady; the functional substances are further loaded in the self-assembly and self-repair coated controlled-release fertilizer, accordingly, the requirements of crops on nutrients can be met, growth of the crops further can be promoted, the resistance of the crops can be improved, soil conditions can be improved, and the self-assembly and self-repair coated controlled-release fertilizer and the method have broad market application prospects.

Description

technical field [0001] The invention relates to the technical field of controlled-release fertilizer production, in particular to a self-assembled and self-repaired coated controlled-release fertilizer with low loading of functional substances and a preparation method thereof. Background technique [0002] Chemical fertilizers play a decisive role in increasing crop production, but there are also many problems, such as the low utilization rate of the season caused by excessive use of chemical fertilizers, and the impact of leaching and volatilization on the atmosphere and water bodies. [0003] As a new type of fertilizer, controlled release fertilizer has been widely used in production practice. It can significantly improve fertilizer utilization rate, increase crop yield, and reduce waste and pollution. However, on the one hand, most of the coating materials of coated controlled-release fertilizers are derived from petrochemical products, which is not conducive to the sust...

AI Technical Summary

Problems solved by technology

However, the existing controlled-release fertilizers pay more attention to the release of nutrients, and there are few studies on controlled-release fertilizers containing functional substances, especially for water-soluble functional substances, which are loaded in controlled-release fertilizers and slowly increase with nutrients. It is very difficult to release