Songnen plain saline-alkali soil comprehensive improvement method

Abstract

The invention discloses a Songnen plain saline-alkali soil comprehensive improvement method. The method includes: fully mixing stripped and smashed Songnen plain saline-alkali soil to be improved, sand, turf, organic fertilizers, and desulfurization gypsum, wherein the volume ratio of the Songnen plain saline-alkali soil is 65-75, the volume ratio of the sand is 20-30, the volume ratio of the turf is 15-20, the volume ratio of the organic fertilizers is 3-6, and the volume ratio of the desulfurization gypsum is 0.06-0.15; backfilling the mixed Songnen plain saline-alkali soil, and watering the Songnen plain saline-alkali soil for more than two times to obtain the improved Songnen plain saline-alkali soil. The method reduces poison of saline and alkali to plants, provides an acid-base buffer effect, improves organic content of the saline-alkali soil, suppresses aggregation of salt on surface soil, and provides nitrogen phosphorus and potassium nutrients required by the plants; and in addition, the sand can improve the structure of the saline-alkali soil, enhance the permeability of soil, and facilitate leaching of saline and alkali.

Description

technical field [0001] The invention belongs to the fields of urban landscaping, city appearance environmental protection, municipal management and agricultural technology, and particularly relates to a method for comprehensively improving saline-alkali soil in Songnen Plain. Background technique [0002] The Songnen Plain saline-alkali land is one of the three concentrated distribution areas of soda saline-alkali land in the world. It is also a rare land resource in China with well-matched water and soil resources, a relatively good concentration, and a large-scale land resource for reclamation. The total amount of saline-alkali land to be developed and utilized The area is about 20.32 million mu. Songnenping is affected by the semi-humid and semi-arid continental monsoon climate in the middle temperate zone. The soil anti-salt period mainly occurs in spring and autumn, and due to the low water level, winter soil freeze-thaw, low rainfall and strong evaporation in spring U...

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Problems solved by technology

[0006] The invention provides a method for comprehensively improving the saline-alkali soil in the Songnen Plain to solve the problem of short duration of the improvement effect in the prior art, and in the prior art, only the high-salt and strong-alkaline soil in the Songnen Plain is improved , without improving structural compaction, low organic matter and nutrient content

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