Method for quickly desalting coastal saline-alkali soil

Abstract

The invention relates to a method for quickly desalting coastal saline-alkali soil, which comprises the following steps of: applying a mixture of an organic fertilizer and gypsum powder to the surface of the coastal saline-alkali soil before seeding crops on the coastal saline-alkali soil; ploughing the coastal saline-alkali soil after applying the mixture of the organic fertilizer and the gypsum powder to make the mixture of the organic fertilizer and the gypsum powder and surface soil of the coastal saline-alkali soil uniformly mixed; and dissolving polyacrylamide in water and irrigating by using the water in which the polyacrylamide is dissolved. Soluble salt ions in the coastal saline-alkali soil can be quickly leached below a plough layer by using the characteristic of the polyacrylamide; irrigation water can be quickly cleared and the surface soil and nutrients are difficult to deposit under the action of the polyacrylamide serving as a flocculating agent; and salt ions leached to the deep layer of the soil are difficult to move to the surface soil with the water again under the action of the polyacrylamide, so that the salinity of the surface soil is reduced.

Description

technical field [0001] The invention relates to a method for rapid desalination of soil, in particular to a method for rapid desalination of soil in coastal saline-alkali land. Background technique [0002] There are large areas of saline-alkali land distributed in our country, and the degree of salinization is expanding, especially in coastal areas. Land salinization not only reduces agricultural production in our country, but also causes great losses. Due to the increasingly serious degree of salinization, large areas of land gradually become wasteland, with no grass growing and no harvest. Improving 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, most of the researches on the desalination of saline-alkali soil, especially the rapid desalination of saline-alkali surface soil in coastal areas are still in the " Engineering measures such as "undergr...

AI Technical Summary

Problems solved by technology

The salinization of the land not only caused a large reduction in agricultural production in our country, but also caused great losses. Due to the increasingly serious degree of salinization, large areas of land gradually became wasteland, with no grass growing and no harvest.

Improving 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, most of the researches on the desalination of saline-alkali soil, especially the rapid desalination of saline-alkali surface soil in coastal areas are still in the " Engineering measures such as "underground pipe salt drainage", "underground blocking salt drainage", "fresh water pressure salt drainage" and the use of chemical salt drainage such as soil amendments are not practical for coastal saline-alkaline areas short of fresh water

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