Novel method of salt-isolating cultivation improvement of saline-alkali soil through straw

Abstract

The invention discloses a method of salt-isolating cultivation improvement of saline-alkali soil through straw and relates to the technical field of saline-alkali improvement. Rising channels of capillary water in high-salt soil is cut off through a straw salt-isolating filter layer, and salt washing is performed on the saline-alkali soil by using rainfall or irrigation water. Meanwhile, humus formed by the decomposition of straw and organic fertilizers is used for adsorbing salt ions, neutralizing the alkali of the soil and improving the soil microenvironment. The structure of the method comprises a straw salt-isolating filter layer which is laid on the upper part of the saline-alkali soil, an organic fertilizer layer at the upper part of the salt-isolating filter layer and a cultivationlayer at the uppermost part from bottom to top. Also, deep ditches are dug between two ridges, and isolation ditches are dug around improved areas. In the method, borrowed soil is not needed, washingand salt washing of the salt soil can be realized with the aid of natural rainfall and irrigation water after covering the straw isolating layer with soil on site, and the cost is reduced. The methodof improving saline-alkali soil is suitable for various saline-alkali soil environment conditions, is a high-efficiency and easy-to-operate method for saline-alkali soil improvement and horticulturalplant cultivation. In addition, the crop straw is used as the salt-isolating layer, so that the reuse of a large amount of straw can be realized to improve the organic matter of the soil, and meanwhile, the method is beneficial for solving the problem of straw burning, and reducing the environmental pollution.

Description

technical field [0001] The patent of the present invention relates to the technical field of saline-alkali soil improvement, in particular to a method for improving saline-alkali soil by separating salt. Background technique [0002] The vast area of ​​saline-alkali soil in my country urgently needs to be developed and utilized to alleviate the contradiction between man and land. The improvement methods of saline-alkali soil mainly include biological improvement method, engineering improvement method, chemical amendment method and other methods. However, the improvement period of the biological improvement method is too long and the effect is slow; the input cost of the engineering improvement method is high, the operation is complicated, and it is difficult for farmers to implement it independently; the chemical improvement method is not a permanent solution, which is not conducive to sustainable development. Therefore, it is necessary to develop a set of high-efficiency, ...

AI Technical Summary

Problems solved by technology

However, the improvement period of the biological improvement method is too long and the effect is slow; the input cost of the engineering improvement method is high, the operation is complicated, and it is difficult for farmers to implement it independently; the chemical improvement method is not a permanent solution, which is not conducive to sustainable development

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