Saline-alkali soil desalinating method

Abstract

The invention discloses an saline-alkali soil desalinating method. The saline-alkali soil desalinating method comprises the following steps of deeply ploughing and ploughing up level lands through a rotary cultivator to enable salinity in topsoil to be ploughed to the lower layer, and besides, subsoil being low in salt content is ploughed to a surface layer; spraying an organic fertilizer mixed with river water through a manure spreader to increase organic matter content in the soil, improve the physics and chemistry properties and salinity composition, and reduce soil PH value; crushing straws through a crusher, after the straws become thoroughly decomposed, spraying crushed straws through a seeder, and covering the soil to which the fertilizer is applied with the crushed straws, so as toreduce soil surface temperature, reduce water evaporation amount of the soil, and provide massive nutrients for soil organisms, and microorganisms propagate; and planting salt-tolerant plants, to increase the ground covering degree, and restrain the accumulation of salt in the soil. Through mechanized operation, the labor consumption is reduced, the desalinating efficiency is improved, and besides, the saline-alkali soil desalinating method is environmentally-friendly and low in cost and can prevent accumulation of salt in the soil.

Description

technical field [0001] The invention belongs to the field of soil restoration, and in particular relates to a desalination method for saline-alkali land. Background technique [0002] There are large areas of saline-alkali land in my country, accounting for about 7% of the state-owned cultivated land. Seriously restricted and affected the sustainable development of agriculture, not only caused a large reduction in agricultural production in our country, causing great losses, but also due to the increasingly serious degree of salinization, large areas of land gradually became wasteland, with no harvest. Transforming saline-alkali land and improving the agricultural production of saline-alkali cultivated land is one of the important tasks of agricultural development in my country. However, the improvement of saline soil and the prevention and control of secondary salinization are not only technical issues, but also restricted by economic and social factors. Therefore, under t...

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Problems solved by technology

[0003] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a method for desalination of saline-alkali land, which solves the problem that the current desalination method uses a large number of neutralizers, the cost is high, or the waste of fresh water resources is caused when flushing

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