Saline-alkali soil improvement method and application thereof

Abstract

The invention provides a saline-alkali soil improvement method and application thereof. The improvement method comprises the following steps of step 1, fully mixing saline-alkali soil, a salt-dissolving growth-promoting bacterium agent, brown sugar and water, performing fermenting, and naturally air-drying to obtain salt-dissolving growth-promoting bacterium fermented soil; 2, uniformly mixing a humic acid aqueous solution with the fermented soil, naturally air-drying a mixture, and then removing salt and alkali separated out from the surface layer of the soil; and 3, repeating the step 2 formultiple times until no salt and alkali are separated out of the soil surface layer to finish improvement of the saline-alkali soil. According to the method for improving the saline-alkali soil through humic acid assisted salt-dissolving growth-promoting bacteria microorganisms, the saline-alkali content of the improved soil is reduced, the granular structure of the soil is moderate, the content of main organic matter is greatly increased, and salt-tolerant plants such as suaeda salsa, kalidium foliatum, lotus corniculatus and salicornia europaea can be directly planted in the improved saline-alkali soil; and the salt-tolerant plants can grow well, and the economic benefit of saline-alkali soil crop planting is improved.

Description

technical field [0001] The invention belongs to the technical field of soil improvement, and relates to a method for improving saline-alkali soil and its application. Background technique [0002] Saline-alkali land refers to a type of soil where the salt content in the soil is too high, which affects the normal growth of crops. The total area of ​​saline-alkali land in the world is about 956 million hectares, of which my country has more than 26 million hectares, mainly distributed in the northeast, north and northwest regions of China. The formation of saline-alkali land in my country is mainly affected by changes in soil types and climatic conditions, and can be subdivided into the following types of areas: coastal saline areas (Dongying, Northeast China), Huanghuaihai Plain saline areas (North China), deserts and deserts Grassland saline area (Northwest China), grassland saline area (Inner Mongolia). [0003] Saline-alkali land is a land resource with great potential fo...

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Problems solved by technology

[0006] The limitation of the physical method is that it consumes a lot of manpower and material resources, and if the groundwater is deep, the traditional improvement measures of saline-alkali land in Xinjiang, such as "irrigating to wash the salt and draining the salt underground", only wash the salt to the deeper soil areas so that they do not pose a threat to plant growth, but are not treated at the root

The limitation of chemical methods is that Xinjiang is generally arid and fresh water resources are scarce. Therefore, it is imminent to find a method that does not require a large amount of fresh water and is low-cost to improve saline-alkali soil.

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