Saline-alkali soil improvement technology

Abstract

The invention discloses a saline-alkali soil improvement technology, and belongs to the technical field of soil salinization. The saline-alkali soil improvement technology comprises the following steps: (1) deeply plowing saline-alkali soil before rainy season, and using a saline-alkali soil modifier in a soil plough layer in the deep plowing process; (2) spraying a soil surface active agent on the surface layer of the soil after ploughing; (3) uniformly spreading crushed straws on the surface layer of the ploughed soil; and (4) after the modifier fully reacts with the soil for a period of time (3-4 weeks), under the conditional situation, fully irrigating the soil with fresh water for 2-3 times to leach salt. According to the saline-alkali soil improvement technology, tillage, physical, chemical and biological improvement methods are comprehensively utilized, the structure of upper soil is changed through the tillage method, the soil conditioner is added to condition the chemical property of the soil, a hydrophobic covering layer is formed on the surface layer of the soil through plant straw, water infiltration is guaranteed, water evaporation is prevented, salt return is prevented, the whole process is easy and convenient to operate, the manual operation frequency is reduced, the physical and chemical properties of the soil are improved, and comprehensive treatment of the salinized soil is realized.

Description

technical field [0001] The invention relates to the technical field of soil salinization, in particular to a saline-alkali land improvement technology. Background technique [0002] Soil salinization is a worldwide problem and an important agricultural environmental problem in my country. Saline-alkali land is widely distributed in China, among which 7.6 million ha of cultivated land is salinized, accounting for about 1 / 5 of the cultivated land area. Soil salinization causes physiological damage to plants and has a great impact on agricultural production. The existing soil improvement methods generally include water conservancy engineering improvement technology, agricultural cultivation improvement technology and other methods. Due to the complex causes of saline-alkali land formation, traditional single improvement measures are difficult to solve the problem. The comprehensive use of chemical, farming, and biological measures in production is an effective method and devel...

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Problems solved by technology

[0003] At present, there are many ways to improve saline-alkali land, among which, the principle of ion exchange is used to replace and gather Na+ and CO32- ions in saline-alkali land to improve soil physical and chemical properties; to use plant straw and green manure to improve soil fertility and improve soil structure; through water conservancy project leaching The drainage method mainly removes the salt in the soil. The existing method has a long improvement cycle, high cost, slow effect, and is prone to problems such as returning to salinity after improvement;

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