Saline-alkaline land improvement method

Abstract

The invention relates to a saline-alkaline land improvement method, and relates to the field of saline-alkaline land planting transformation. The key point of the method is that a saline-alkaline land improvement agent composed of 5-20% of humic acid, 5-10% of citric acid, 6-20% of a maleic acid-acrylic acid copolymer, 5-10% of urea, 3-7% of a trace element compound, 0.3-1% of a biological bacteria preparation, 8-15% of crop straws or plant stems and leaves and 10-25% of a nitrogen-phosphorus-potassium fertilizer is spread into the saline-alkaline land, and land preparation and tilling are carried out, such that the saline-alkaline land improvement agent is uniformly distributed in the soil with a washing depth of 10-50cm; and the land is irrigated with water, and irrigation is continued for 8-15 days, wherein a water depth is 5cm. The method provided by the invention has the advantages of low cost, easy operation, and good saline-alkaline land improvement effect. The method is suitable for large-scale popularization and application.

Description

technical field [0001] The invention relates to a method for improving saline-alkali land, which belongs to the technical field of saline-alkali land improvement. Background technique [0002] Saline-alkali land refers to the salt contained in the soil that affects the normal growth of crops. Soil salinization is a worldwide problem. According to incomplete statistics from UNESCO and FAO, the area of ​​saline-alkali land in the world is 954.38 million hectares, of which my country has 99.13 million hectares, or about 1.47 billion mu; more than 100 cities across the country are located in saline-alkali distribution areas, and nearly 500 million mu of agricultural land has been reduced or abandoned due to salinization, mainly concentrated in North China, Northwest and Northeast China. arid and semi-arid regions. In addition, during the cultivation process, the long-term excessive use of chemical fertilizers has led to the intensification of secondary salinization and serious co...

AI Technical Summary

Problems solved by technology

[0004] The existing improvement technologies and methods include ancient technologies, such as leveling the land, deep plowing and drying, loosening the soil in time, planting salt-tolerant plants, etc., as well as soil improvers developed by some modern microbial chemical new technologies, as well as using New materials are used to improve saline-alkali land, etc. However, in the current treatment of saline-alkali soil, there are still problems such as long improvement cycle, improvement effect cannot be maintained, and improvement cannot be promoted.