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Preparation method of liquid fertilizer with humic acid-urea complex as matrix

A humic acid urea and liquid fertilizer technology, which is applied in the field of preparing liquid fertilizers with different nutrient distribution ratios, can solve the problems of long production process, high production cost, and environmental pollution, and achieve low production cost, easy operation, and no environment. pollution effect

Inactive Publication Date: 2011-11-23
谭钧
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method of the humic acid liquid (paste) body washing fertilizer provided by the above documents and patents has defects such as long production process, troublesome operation, high production cost, and some also have environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: Take 544 parts of water in the reactor, add 200 parts of urea, stir and dissolve at about 85°C, add 246 parts of weathered coal (containing 44% humic acid, 26.5% moisture), react for 10 minutes, add 90 parts of phosphoric acid Monoammonium, continue to react at about 95°C for 40 minutes, separate solid and liquid, heat the solution to about 80°C, add 20 parts of citric acid, 12 parts of zinc sulfate heptahydrate, 8.5 parts of ferrous sulfate heptahydrate, 12 parts of borax, 70 parts Potassium chloride, continue to react for 30 minutes, cool, make humic acid urea complex liquid fertilizer, product analysis result: water-soluble humic acid 8.7%, nitrogen 8.2%, P 2 o 5 5.3%, potassium 4.9%, organic matter 12.0%, pH=5.6.

Embodiment 2

[0028] Example 2: Take 550 parts of water in the reactor, add 260 parts of urea, stir and dissolve at about 80°C, add 250 parts of weathered coal (containing 44% humic acid, 26.5% moisture), react for 10 minutes, add 90 parts of phosphoric acid Monoammonium, continue to react at about 95°C for 50 minutes, separate solid and liquid, heat the solution to about 80°C, add 20 parts of citric acid, 12 parts of zinc sulfate heptahydrate, 8.5 parts of ferrous sulfate heptahydrate, 12 parts of borax, 185 parts Potassium chloride, continue to react for 35 minutes, cooling, make humic acid urea complex liquid fertilizer, product analysis result: water-soluble humic acid 8.3%, nitrogen 9.9%, P 2 o 5 4.4%, potassium 9.8%, organic matter 14.5%, pH=6.3.

Embodiment 3

[0029] Example 3: Take 550 parts of water in the reactor, add 400 parts of urea, stir and dissolve at about 80 ° C, add 250 parts of weathered coal (containing humic acid 69.3%, moisture 27.8%), react for 10 minutes, add 140 parts of phosphoric acid Monoammonium, continue to react at about 95°C for 45 minutes, separate solid and liquid, heat the solution to about 80°C, add 16.5 parts of citric acid, 11 parts of zinc sulfate heptahydrate, 7.5 parts of ferrous sulfate heptahydrate, 10 parts of borax, 267 parts Potassium chloride, continue to react for 40 minutes, cooling, make humic acid urea complex liquid fertilizer, product analysis result: water-soluble humic acid 7.6%, nitrogen 14.9%, P 2 o 5 6.4%, potassium 13.9%, organic matter 17.2%, pH=6.7.

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Abstract

The invention provides a preparation method of a liquid fertilizer with a humic acid-urea complex as the matrix. According to the preparation method, a humic acid-urea complex aqueous solution is firstly prepared by using phosphate as an activator and using humic acid raw material coals and urea as the main raw materials, and then the humic acid-urea complex aqueous solution undergoes a reaction with other raw materials to prepare the humic acid-urea complex liquid fertilizer. The invention has the following advantages: the used humic acid raw material coals (weathered coal, brown coal and peat) are rich in resources, cheap and easily available; the preparation method provided by the invention has characteristics of short production process flow, simple equipment operation, no discharge of pollutants during the production process, no environmental pollution and low production cost, and is suitable for large-scale industrial production; the product provided by the invention has comprehensive nutrient elements and high content of water-soluble humic acid, is easy for crops to absorb, has conspicuous fertilizer effects, can be used to improve the soil structure, stimulate crops to absorb nutrients, promote the growth of crops, raise the drought resistance and stress resistance of crops, increase the output and enhance the crop quality.

Description

technical field [0001] The invention belongs to the technical field of slow-release fertilizers, in particular to a method for preparing liquid fertilizers with different nutrient distribution ratios by using humic acid urea complex as a substrate. Background technique [0002] During the whole process of crop growth and development, the applied base fertilizer cannot fully meet the nutrient content required by it, and the phenomenon of lack of nutrition often occurs during the fruiting period of vigorous growth, which requires the application of top dressing. The popularization and application of humic acid fertilizer over the years has made people realize that humic acid compound fertilizer is a green and pollution-free ecological fertilizer, which can improve soil, increase soil aggregate structure, improve soil microbial ecological environment; improve fertilizer efficiency and utilization rate, Stimulate the absorption of nutrients and growth of crops, improve the droug...

Claims

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Application Information

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IPC IPC(8): C05G3/04C05G3/08C05G3/80C05G3/90
Inventor 谭钧王丽霞董钰赵世军邢文军张鸿云王鹏瑞
Owner 谭钧
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