Humic acid synergistic slow-release compound fertilizer and preparation method thereof

Abstract

The invention discloses a humic acid synergistic slow-release compound fertilizer and a preparation method thereof and belongs to the technical field of slow-release compound fertilizers. The fertilizer is prepared from the following raw materials in parts by weight: 15-45 parts of nitrogen fertilizer, 15-35 parts of phosphorus fertilizer, 10-25 parts of potassium fertilizer, 1-10 parts of medium trace elements, 5-15 parts of biological humic acid and a controlled-release agent, wherein the nitrogen fertilizer raw material comprises urea which accounts for 8-25% of total weight, the addition of the controlled-release agent is 0.7-0.9% the weight of urea, the controlled-release agent is prepared by mixing an urease inhibitor and a nitrification inhibitor in a weight ratio of 1 to (0.5-1), and biological humic acid is prepared by fermenting crushed bagasse and animal waste by using a special microbial agent. Biological humic acid which has the advantages of small molecular weight, strong activity, good solubility and the like is added into the compound fertilizer, and the controlled-release agent and biological humic acid are combined by using a method of combining amino acid granulation and urea-based guniting, so that the fertilizer conserving and supply condition of soil is improved while the utilization rate of the fertilizer is improved.

Description

technical field [0001] The invention belongs to the technical field of slow-release compound fertilizers, in particular to a humic acid synergistic slow-release compound fertilizer and a preparation method thereof. Background technique [0002] As an important agricultural product, chemical fertilizer plays a significant role in increasing crop yield and is an indispensable factor of production in modern agriculture. People have used a large amount of inorganic fertilizers for a long time, coupled with improper use methods, the fertilizer rate is not high, resulting in a large amount of fertilizer loss, pollution of soil and water, and the decline of crop resistance, which seriously threatens the sustainable development of agriculture. A variety of chemical and physical methods have been proposed to solve the problem of fast dissolution and low utilization of nitrogen fertilizers by exploring, and slowing down the decomposition and conversion of nitrogen by adding long-actin...

AI Technical Summary

Problems solved by technology

People have used a large amount of inorganic fertilizers for a long time, coupled with improper use methods, the fertilizer rate is not high, resulting in a large amount of fertilizer loss, polluting the soil and water, and reducing the stress resistance of crops, which seriously threatens the sustainable development of agriculture.

A variety of chemical and physical methods have been proposed to solve the problem of fast dissolution and low utilization of nitrogen fertilizers by exploring, and slowing down the decomposition and conversion of nitrogen by adding long-acting slow-release agents to fertilizers and inhibiting the activity of certain enzymes in the soil is An Effective Way to Improve Fertilizer Utilization Efficiency

[0003] Extensive application of inorganic chemical fertilizers can easily lead to a decrease in soil fertility, which not only destroys the acid-base balance of the soil, but also leads to the decline of soil organic matter content and the appearance of soil compaction.

Biological humic acid powder is a kind of macromolecular organic substance, which can promote soil improvement, increase efficiency, prevent and control crop diseases, improve the quality of agricultural products, prevent soil and agricultural products from being polluted, and enhance the stress resistance of crops. It has good utilization value in release fertilizer, but it is less popularized and utilized at present