Chelating controlled-release composite fertilizer and preparation method thereof

Abstract

The invention relates to the agricultural fertilizer technical field, and concretely relates to a chelating controlled-release composite fertilizer and a preparation method thereof. The composite fertilizer comprises the following raw materials by weight: 8-10 parts of composite amino acid, 150-250 parts of urea, 150-250 parts of monoammonium phosphate, 100-140 parts of potassium chloride, 30-50 parts of pumice sand, 10-30 parts of borax, 8-10 parts of sulphur, 3-5 parts of white copperas zinc sulfate, 3-5 parts of manganese sulfate, 3-5 parts of ferric sulfate, 1-3 parts of magnesium sulfate and 1-3 parts of copper sulphate. The carbamide chelating controlled-release fertilizer has 8% of amino acid content. According to the chelating condition, pH value is set in a neutral and slight alkaline scope, so that chelating effect of trace element and amino acid can be ensured. In the method, amino acid is taken as the main organic composite fertilizer, based on reasonable ratio of nitrogen, phosphor and potassium, part of trace element is added, utilization rate of a lot of elements can be increased with different degrees, so that the trace element can alleviate the disease due to lack of trace element, and has important effect.

Description

[0001] technical field [0002] The invention relates to the technical field of agricultural fertilizers, in particular to a chelating controlled-release compound fertilizer and a preparation method thereof. Background technique [0003] In the past 10 years, people have studied chelation technology, selected suitable chelating agents, chelated trace elements, and maximized the utilization rate of fertilizers. As a chelating agent, amino acids have moderate stability constants, are not disturbed by soil pH and other ions, and can be directly absorbed by crops. [0004] my country is a big agricultural country, and it is also a big country in the production and use of chemical fertilizers. The extensive use of chemical fertilizers has promoted the increase of my country's grain production and greatly promoted the development of my country's agriculture. However, in the process of using chemical fertilizers, most people mistakenly believe that compound fertilizers contain...

AI Technical Summary

Problems solved by technology

However, in the process of using chemical fertilizers, most people mistakenly believe that compound fertilizers containing nitrogen, phosphorus, and potassium are universal fertilizers, so they ignore the use of other fertilizers

The consequences of doing so are serious soil compaction, excessive pH value, reduced crop quality, increased farming costs for farmers, and a large lack of other elements needed for crop growth, so that the crop yield does not reach the expected yield of fertilization, or during the later growth process prone to pests and diseases