Method for comprehensively improving saline and alkaline land soil

Abstract

The invention discloses a method for comprehensively improving saline and alkaline land soil, which is characterized by comprising the following steps of: applying different amounts of special improving medium for the saline and alkaline land soil according to the saline and alkaline conditions and carrying out rotary tillage for 1-2 times to uniformly mix the medium with the soil, wherein the applying amount of the improving medium is 10 kg / sq.m in a severe saline and alkaline land, 8 kg / sq.m in a moderate saline and alkaline land and 5 kg / sq.m in a light saline and alkaline land; inputting water to immerse the land surface, and then draining water after immersing for 3-8 hours; then covering a layer of nutrient-rich substrate with the thickness of 5-10 cm on the surface layer of the water-drained soil; finally, putting at least 20 alive earthworms into each square meter of soil and then farming. The method provided by the invention can overcome the disadvantages that the traditionalimproving technology is single and the saline and alkaline problem cannot be radically solved; by utilizing the method, the composition of a microorganism system of the whole farming layer is abundant, the structure is complicated and the function is complete; a good circulation of a spontaneous fermentation synthesis is formed, the growth of pathogenic bacteria in the soil is inhibited, and the saline and alkaline land is effectively and systematically improved.

Description

technical field [0001] The invention relates to saline-alkali soil, in particular to a comprehensive improvement method for saline-alkali soil. Background technique [0002] The improvement of saline-alkali land is a worldwide problem, and the global saline-alkali land area exceeds 900 million hectares. There are 100 million hectares of saline-alkali land in my country. Saline soil is a part of my country's important land resources, and saline soil occupies a large proportion of wasteland resources. Saline-alkali soil includes two kinds of soils with different properties: saline soil and alkaline soil. Saline soil contains excessive water-soluble salts, most of which are neutral salts with an alkaline reaction and a pH value between 7 and 8. Salt damage is mainly caused by excessive sodium ion concentration. Saline soil and salinized soil are composed of neutral salts such as sodium sulfate and sodium chloride, and the alkalinity is not strong. Alkaline soil contains w...

AI Technical Summary

Problems solved by technology

Commonly used gypsum has poor solubility in soil with high pH value and high input

Organic acid mixtures are costly and short-lived

Peat and farmyard manure are easy to decompose and have limited action time

The above technologies have narrow source of raw materials, limitations in large-scale production, complex production methods, and long improvement cycles for saline-alkali land, and cannot achieve comprehensive, systematic, and persistent improvement of soil to turn it into a stable and high-quality fertile land.

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