Saline land improvement process

Abstract

The invention discloses a saline land improvement process. The saline land improvement process comprises the following process steps that 1, a hidden salt elimination pipe is installed, a drainage channel is dug and a water storage tank is constructed; 2, medium trace elements are uniformly sprayed to saline and alkaline land, and irrigation is performed two times after rotary tillage; 3, salt water in the hidden pipe is collected to perform salt water desalting; 3, an organic fertilizer is applied, rotary tillage is performed, and a microbial agent and medium trace element fertilizers are sprayed; 5, the microbial agent is sprayed at fixed period, and irrigation is performed to eliminate salt, wherein 0.1-0.4 part of medium trace element fertilizers, 4-8 parts of organic fertilizer and 0.8-1.6 parts of microbial agent are applied per mu. The process has the technical advantages of being low in soil remediation, simple and convenient to operate, free of salt returning, capable of recycling salt water and improving soil fertility, obvious in effect and free of secondary pollution and facilitates large-area popularization and application. The process has the very important significance on reliving of the soil contamination situation, achievement of agricultural recycling economy and establishment of conservation-minded society.

Description

technical field [0001] The invention belongs to the technical field of saline-alkali land improvement, and in particular relates to a saline-alkali land improvement process. Background technique [0002] Soil salinization has become a global problem. With the population increasing year by year and the cultivated land decreasing year by year, it is of great strategic significance to develop and utilize saline-alkali land. my country has a lot of people and little land, and the process of urbanization and industrialization has occupied a large amount of cultivated land. Due to the salinization of a large amount of cultivated land due to improper irrigation, it is becoming more and more difficult to maintain the red line of 1.8 billion mu of cultivated land. On the other hand, about 80% of the 1.5 billion mu of saline-alkali land in my country is in a barren state. Therefore, the improvement and utilization of saline-alkali land is of great significance to national economic de...

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, the above-mentioned comprehensive treatment method for saline-alkali land has the following defects: 1) the large water washing salt consumes too much water resources, which is not conducive to water saving; the project volume is large, and the investment in drainage projects is high, which is uneconomical ; The source of irrigation water is saline-alkali water, and the more saline-alkali it is, the greater the degree of saline-alkali; 2) Medium and trace element fertilizers have strict requirements on the type of salt, crop planting structure, and irrigation water-saving conditions, etc., and their applicability is narrow; Polymer complexes are made of raw materials, with limited resources and easy to cause secondary pollution; 3) The use of biological measures can only alleviate the soil condition of the plow layer, but cannot solve the phenomenon of salt return during the rainy season