Saline-alkali soil modifier

Abstract

The invention discloses a saline-alkali soil modifier which comprises the following components in parts by weight: 10-20 parts of desulfurization gypsum, 2-4 parts of biogas slurry and 3-5 parts of coal ash. The invention has the advantages that the application of the saline-alkali soil modifier disclosed by the invention in modifying soil not only effectively consumes the contaminating biogas slurry, coal ash and desulfurization gypsum and turns waste into wealth but also improves the planting condition of soil, especially solves the problem of soil salinization in China at present to a certain extent, and has huge economic and social benefits.

Description

technical field [0001] The invention relates to the technical field of saline-alkali improvement, in particular to a saline-alkali 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 deteriora...

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