A treatment method for severely salinized grassland

Abstract

The invention discloses a treatment method of severe salinization grassland. The treatment method of the severe salinization grassland comprises the following steps that (1) the severe salinization grassland is ploughed to form ridges and furrows; (2) corn stalks are laid in the furrows. The treatment method further comprises the step that acid fertilizer is added to the surface layer of the severe salinization grassland every year before the step (1) is conducted or after the step (2) is accomplished. The treatment method of the severe salinization grassland has the following advantages that the soil structure is changed through ploughing and covering of the corn stalks, the quantity of surface soil organic matter is increased, and the amount of evaporation of moisture on the soil surface is reduced; meanwhile, due to application of a small quantity of acid fertilizer, the salt content and the pH value of surface soil are reduced, and the soil fertility can be improved; due to covering of the corn stalks, seeds can be effectively blocked, seed germination can be promoted through improvement of soil, establishment and growth of plant root systems are facilitated, reestablishment of vegetation is facilitated, and the severe salinization grassland is treated fundamentally; the treatment cost is low, and raw materials can be easily obtained; ploughing, covering and fertilizer application are combined, so that the vegetation recovery speed is high.

Description

technical field [0001] The invention relates to a treatment method for severely salinized grassland, which belongs to the technical field of soil improvement. Background technique [0002] Soil salinization refers to the process in which the salt in the bottom soil or groundwater rises to the surface with the capillary water, and after the water evaporates, the salt accumulates in the surface soil. From a worldwide perspective, salinization is one of the most important factors limiting crop yields. The area of ​​salinization in the world has exceeded 1 billion hectares, accounting for a quarter of the land area of ​​cultivated land. China's saline-alkali soil is widely distributed, with a large area and many types, with a total area of ​​about 100 million hectares. Especially in recent years, due to the dual impact of land overuse and global change, soil salinization tends to increase and expand. In some areas, soil salinization seriously limits the development of agricult...

AI Technical Summary

Problems solved by technology

The above methods have achieved certain results for different degraded saline-alkaline grasslands, but the comprehensive technology is not yet mature enough, and large-scale promotion is still limited by improved land conditions and capital costs.

For severely salinized grassland (pH>10, vegetation coverage less than 10%), the improvement effect of the above single method is poor

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