A kind of saline-alkali soil improvement method

Abstract

The invention relates to a soil improvement method for saline-alkali soil. The method is characterized by comprising the following processing steps: bulldozing, i.e. shoving soil on the surface of the saline-alkali soil which needs to be improved; pipe laying, i.e. laying leaky pipeline systems on the ground of which the surface soil is shoved; stone laying, i.e. laying a broken stone layer in gaps between the pipeline systems; fertilizer covering, i.e. covering an organic fertilizer layer on the cobblestone layer; soil leveling, i.e. raking the surface soil in the bulldozing step broken and then covering the organic fertilizer layer with the broken surface soil; alkali washing, i.e. wetting the surface soil with water or aqueous solution to wash out excessive saline-alkali substances in the soil. The broken stone layer in the soil improvement method cuts off salt conveying from soil capillary water to the ground surface, takes a good salt accumulation prevention effect after washing out alkali and is beneficial to durability and stability of improving the saline-alkali soil; moreover, microbiological degradation of the organic fertilizer also can reduce alkalinity of the soil; the method can be used for comprehensively treating the saline-alkali soil.

Description

technical field [0001] The invention relates to the field of soil improvement, in particular to a soil improvement method for saline-alkali land. Background technique [0002] Saline-alkali land is a type of salt accumulation, which means that the salt contained in the soil affects the normal growth of crops. According to the incomplete statistics of UNESCO and FAO, the area of ​​saline-alkali land in the world is 954.38 million hectares, of which my country is the largest 99.13 million hectares. The formation of alkaline soil and alkalized soil in my country is mostly related to the accumulation of carbonate in the soil, so the degree of alkalization is generally high, and plants in severe saline-alkali soil areas can hardly survive. At present, domestic treatment methods for saline-alkali land generally include salt discharge method and salt pressure method, etc., but they all have shortcomings. The amount of salt is reduced. The salt pressure method is to use natural pr...

AI Technical Summary

Problems solved by technology

The salt pressure method is to use natural precipitation or artificial flood irrigation to make part of the saline and alkali penetrate downward along the pores and cracks of the soil, and bring the salinity of the surface soil to the bottom layer with the water. Although the above method can make the saline-alkali surface layer Therefore, there is an urgent need to develop a method for improving saline-alkali land with low water consumption and long-term effectiveness, which can make saline-alkali land suitable for garden greening and planting.

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