A kind of slow-release fertilizer suitable for water and fertilizer integration and preparation method thereof

Abstract

The invention provides a slow release fertilizer suitable for integration of water and fertilizer. The slow release fertilizer is a nanocapsule slow release fertilizer formed by using chemical fertilizers as core materials and using slowly soluble polymers as wall materials and can be dispersed in water to form a colloidal solution and achieve the aims of slow release and controlled release. The invention further provides a preparation method of the slow release fertilizer. Capsule wall materials of the slow release fertilizer, namely slowly soluble polymers with opposite charges, are mixed and then carry out polymerization reaction and coat the core materials, and the materials are solidified by a crosslinking agent and are filtered and dried, thus obtaining the nanocapsule slow release fertilizer. The slow release fertilizer can be dispersed in water to form the colloidal solution and can be used for irrigation together with water. The capsule wall materials are the slowly soluble polymers, can be slowly dissolved in soil to achieve the aim of controlled release and can not cause secondary pollution to the soil.

Description

technical field [0001] The invention belongs to the field of fertilizers for crops, and more precisely relates to a slow-release fertilizer suitable for integration with water and fertilizer. Background technique [0002] With the continuous increase of our country's population, the demand for food is also increasing, and vigorously developing agriculture is an important measure. Chemical fertilizers are playing an increasingly important role in agriculture. The current use of chemical fertilizers mainly has two major problems: large application rates, low utilization rates, and soil pollution. my country's water resources are scarce, and agriculture needs a lot of water. The lack of water in the dry season is one of the important factors hindering the development of my country's agriculture. In this way, solving the problems of fertilizer utilization rate, soil pollution and saving agricultural water has become one of the important contents of research on chemical fertiliz...

AI Technical Summary

Problems solved by technology

This solution is to microencapsulate various fertilizers, and then mix them for granulation. Due to the large particles and poor solubility in water, it is still not suitable for the application of water and fertilizer integration.

[0007] According to the above, the current slow-release fertilizer particles in my country are relatively large. Although they can achieve the purpose of slow-release control, they are not suitable for the integration of water and fertilizer in modern agriculture. A lot of manpower and time are wasted in the process of fertilization, which increases the amount of water used.