Method for enhancing evaporation resisting and water preserving ability of sandy soil

Abstract

The invention discloses a method for enhancing evaporation resisting and water preserving capacity of sandy soil, comprising the steps of adding modified straw materials into soil, and fully mixing the modified straw materials with surface soil. The modified straw materials are added according to the addition standard that when the content of organic matters is less than 0.5%, the additive amount of the modified straw materials is 1000 to 1200kg / mu; when the content of organic matters is between 0.5% and 1.5%, the additive amount of the modified straw materials is 500 to 800 kg / mu; and when the content of organic matters is larger than 1.5%, the additive amount of the modified straw materials is 200 to 300 kg / mu. Due to the adoption of the method, lower cost is obtained, and the structure of the soil can be improved and the soil fertility is improved. The sandy soil or cultivated land needs not to be subjected to any project modification without final-period management. All in all, by adopting the method, ecological validity of sandy soil moisture can be efficiently enhanced and soil desertification and soil erosion are controlled, and product output of unit area is favorably increased.

Description

technical field [0001] The invention relates to sandy soil improvement technology, specifically a method for improving sandy soil anti-evaporation and water retention capacity, and belongs to the technical field of sandy soil improvement and soil desertification prevention and control. Background technique [0002] At present, the phenomenon of land desertification in my country is very serious. According to the 2005 China Desertification Status Bulletin, as of 2004, the national desertification land area is about 1.74×10 6 km 2 , accounting for 18.12% of the total land area, and the area of ​​desertified cultivated land accounts for 2.66% of the total area of ​​desertified land. The organic matter in sandy soil decomposes faster and is not easy to accumulate, resulting in poor fertility of sandy soil. At the same time, the interaction force between sandy soil particles is small, the texture is loose, the soil permeability is good, the pores are large, and the capillary ...

AI Technical Summary

Problems solved by technology

[0003] In recent years, various technologies for improving the anti-evaporation and water retention capacity of sandy soil have been born one after another, but most of these technologies use PAM as the main modifier. Leather and other defects