Saline-alkali soil improver

Abstract

The invention discloses a saline-alkali soil improver. The saline-alkali soil improver is prepared from the following components in parts by weight: 10 to 20 parts of desulfurized gypsum, 3 to 4 partsof phosphogypsum, 0.2 to 0.6 part of sulfur, 3 to 6 parts of humic acid, 2 to 5 parts of furfural residues, 2 to 4 parts of biogas slurry and 3 to 5 parts of fly ash. The saline-alkali soil improveris used to improve soil; biogas slurry, fly ash and desulfurized gypsum, which pollute the environment, are effectively consumed and turned into resources, the planting conditions of the soil are improved at the same time, the current important problem of soil alkalization in China is solved to a certain extent, and the saline-alkali soil improver generates huge economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the technical field of saline-alkali land improvement, in particular to a saline-alkali land improvement agent. Background technique [0002] Saline-alkali land is a kind of soil type widely distributed in the world, and it is an important land resource. The saline-alkali land area in the world is about 15 billion mu, and the saline-alkali land area in my country is about 540 million mu, accounting for one-thirtieth of the world; the saline-alkali land in my country is about 90 million mu, and the cultivated land in my country is only 1.5 billion mu, accounting for nearly one-tenth of the cultivated land area in my country. one fifth. At present, it has become the biggest obstacle restricting the construction of ecological environment and the sustainable development of agriculture in our country. At the same time, with the reclamation of large areas of land, soil salinization caused by unreasonable irrigation and water quality...

AI Technical Summary

Problems solved by technology

However, the simple use of biogas slurry to improve soil has the following disadvantages: 1. The nutrient concentration is low, and the cost of fertility is significantly higher than that of chemical fertilizers; 2. The chemical oxygen demand (COD) is too high, which does not meet the national emission standards; 3. The smell is unpleasant and large areas Use will multiply mosquitoes and pollute the environment; 4. The use of biogas slurry alone has little effect on the reduction of soil alkalinity and bulk density

However, the simple use of fly ash to improve soil has the following disadvantages: 1. Low absorbable nutrient content and low fertility; 2. Improper use methods will form dust, and excessive use will cause heavy metal pollution; 3. The soil can only be reduced by physical and chemical adsorption. Acidity or alkalinity can not fundamentally adjust the microbial population of the soil, improve the planting environment, and treat the symptoms but not the root cause

However, the simple use of desulfurized gypsum to improve soil has the following disadvantages: 1. Low absorbable nutrient content and low fertility; 2. Improper use methods will form dust, and excessive use will cause heavy metal pollution; 3. Only physical and chemical adsorption can reduce soil acidity. or alkalinity, it is impossible to fundamentally adjust the soil microbial population, improve the planting environment, and treat the symptoms but not the root cause. For this reason, we propose a saline-alkali soil improver