Slow-release type compound fertilizer for improving saline-alkali land and preparation method thereof

A compound fertilizer and slow-release technology, applied in the direction of organic fertilizer, excretion fertilizer, fertilizer mixture, etc., can solve the problems of high hygroscopicity, poor effect of improving soil structure of water retention performance in saline-alkali land, difficult storage, etc., and achieve gel ability Strong, reduce water loss, improve the effect of water retention capacity

Inactive Publication Date: 2019-11-08
SHANDONG SUNWAY LANDSCAPE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fertilizers currently used to improve saline-alkali land have high hygroscopicity and are not easy to store, and it is often necessary to coat the fertilizer particles
Although the current coating materials improve the fertilizer efficiency of saline-alkali land improvement fertilizers to a certain extent, they are not effective in improving the water retention performance and soil structure of saline-alkali land.

Method used

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  • Slow-release type compound fertilizer for improving saline-alkali land and preparation method thereof
  • Slow-release type compound fertilizer for improving saline-alkali land and preparation method thereof
  • Slow-release type compound fertilizer for improving saline-alkali land and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A slow-release compound fertilizer for improving saline-alkali land, in parts by weight, comprising the following components:

[0034] 20 parts of humic acid, 15 parts of human and livestock manure, 10 parts of corn stalks, 6 parts of soybean meal, 5 parts of rice bran, 10 parts of fermentation liquid, 4 parts of microbial agent, and 10 parts of coating material;

[0035] The coating material is a composite gel formed by polyacrylic acid, silica gel, sodium alginate and chitosan; the mass ratio of polyacrylic acid, silica gel, sodium alginate and chitosan is 3:3: 2:10;

[0036]The fermentation liquid is a mixed aqueous solution of Lactobacillus acidophilus, Bacillus subtilis and Bacillus licheniformis, the mass concentration of Lactobacillus acidophilus in the mixed aqueous solution is 15%, the mass concentration of Bacillus subtilis is 8%, and the mass concentration of Bacillus licheniformis The mass concentration of bacilli was 10%.

Embodiment 2

[0038] In parts by weight of Example 1:

[0039] (1) Sodium alginate (the number average molecular weight is 35775, the ratio of number average molecular weight and weight average molecular weight is 1.392, food grade, Qingdao Mingyue Seaweed Group Co., Ltd.) is dissolved in deionized water to obtain a mass concentration of 5%. Sodium alginate aqueous solution; Chitosan (deacetylation degree 95%, Shandong Aokang Biotechnology Co., Ltd.) is dissolved in the acetic acid aqueous solution that concentration is 2wt%, and the obtained mass concentration is 5% chitosan acetic acid solution;

[0040] (2) Mix sodium alginate aqueous solution and chitosan acetic acid solution evenly, and add dropwise a calcium chloride solution whose mass concentration is 25%, the mass ratio of sodium alginate and calcium chloride is 0.85:1; Combined reaction for 1h to prepare sodium alginate / chitosan composite gel;

[0041] (3) Dissolve 1 mL of tetraethyl orthosilicate in 10 mL of absolute ethanol, th...

Embodiment 3

[0045] A slow-release compound fertilizer for improving saline-alkali land, in parts by weight, comprising the following components:

[0046] 30 parts of humic acid, 22 parts of human and livestock manure, 15 parts of corn stalks, 11 parts of soybean meal, 8 parts of rice bran, 15 parts of fermentation broth, 9 parts of microbial agent, 20 parts of coating material;

[0047] The coating material is a composite gel formed by polyacrylic acid, silica gel, sodium alginate and chitosan; the mass ratio of polyacrylic acid, silica gel, sodium alginate and chitosan is 7:3: 4:13;

[0048] The fermentation liquid is a mixed aqueous solution of Lactobacillus acidophilus, Bacillus subtilis and Bacillus licheniformis, the mass concentration of Lactobacillus acidophilus in the mixed aqueous solution is 20%, the mass concentration of Bacillus subtilis is 13%, and the mass concentration of Bacillus licheniformis The mass concentration of bacilli was 12%.

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Abstract

The invention discloses slow-release type compound fertilizer for improving saline-alkali land and a preparation method thereof. The compound fertilizer includes, by weight, the following components:20-30 parts of humic acid, 15-22 parts of human and animal manure, 10-15 parts of corn stalks, 6-11 parts of soybean meal, 5-8 parts of rice bran, 10-15 parts of a fermentation bacteria liquid, 4-9 parts of a microbial agent, and 10-20 parts of a coating material; the coating material is composite gel formed by polyacrylic acid, silica gel, sodium alginate and chitosan; and the fermentation bacteria liquid is an aqueous solution of lactobacillus acidophilus with a mass concentration of 25%. The slow-release type compound fertilizer is good in water absorption and water retention performance, can effectively improve the water retention performance of soil of the saline-alkali land and contents of nutrient elements such as organic matter, nitrogen, phosphorus and potassium in the soil when the slow-release type compound fertilizer is used for improvement of the saline-alkali land, and enables the pH value of the saline-alkali land to be reduced. The invention also discloses the preparation method of the slow-release type compound fertilizer, and the preparation method is simple in process and is low in cost.

Description

technical field [0001] The invention relates to the field of saline-alkali land improvement, in particular to a slow-release compound fertilizer for saline-alkali land improvement and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of my country's society and economy, the continuous acceleration of industrialization and urbanization, and the continuous growth of population, the quantity and quality of cultivated land in my country have been declining, and food security is facing huge risks. Saline-alkali land is currently the largest reserve land resource in my country. The prevention and development of soil saline-alkali land has become an important research content for social and economic development and sustainable progress. The main reason for the formation of saline-alkali land is the redistribution of soluble salts in the soil, and the accumulation of salt on the soil surface exceeds the normal value. The main fa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05G3/00
CPCC05F3/00C05G3/00
Inventor 王胜
Owner SHANDONG SUNWAY LANDSCAPE TECH
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