Saline-alkali land improvement method

Abstract

The invention discloses a saline-alkali land improvement method. The saline-alkali land improvement method comprises the steps of: diluting a liquid saline-alkali soil pH conditioner in 500-800 timesby using water, so that a pH conditioning diluent is obtained, and uniformly spraying the pH conditioning diluent on the surface of a saline-alkali land, wherein the application amount is 2-5 Kg / mu; performing soil measurement, and measuring the volume weight and the alkalisation degree of soil to be improved; and, deeply ploughing and levelling the saline-alkali land according to the volume weight and the alkalisation degree of the soil to be improved, performing salt drainage by a concealed pipe on the levelled saline-alkali land, after the concealed pipe is paved, performing irrigation on the saline-alkali land, and applying a soil oriented conditioner onto the processed saline-alkali land. According to the saline-alkali land improvement method in the invention, the soil is improved byadoption of an improver in the invention; biogas slurry, coal ash and desulfurized gypsum polluting the environment are effectively consumed, and changed into treasure; furthermore, the planting condition of the soil is improved; and in particular, the current key problem in our country, namely salinization of soil, can be solved to a certain degree.

Description

technical field [0001] The invention belongs to the technical field of saline-alkali land improvement, in particular to a saline-alkali land improvement method. 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 qualit...

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 microbial population of the soil, improve the planting environment, and treat the symptoms but not the root cause. Therefore, we propose a method for improving saline-alkali land