Abstract
As an important land resource, the poor physical and chemical properties of soil in saline alkali land are the biggest obstacle to plant growth and development in saline alkali land. Carrying out targeted research on saline alkali land improvement is of great significance to ensure food security and protect the ecological environment. In recent years, it is urgent to fully tap the potential of such areas in agricultural production and ecological greening through economic and effective original soil improvement measures. The existing research and engineering projects of saline alkali land treatment at home and abroad are mostly realized through water conservancy, physics, chemistry, biology and other measures, and tend to form a comprehensive treatment system integrating engineering, plant, microorganism and other technologies. Among them, salt separation layer + concealed pipe drainage is a more effective and commonly used engineering measure in saline alkali land treatment. Through the research and development of supporting new materials and processes, constantly improving the technical system can greatly promote saline alkali land treatment. This paper discusses the improvement of salt barrier in saline alkali soil
Highlights
Soil salinization is a serious problem facing agriculture in the world [1,2,3,4]
In recent years, straw has been used as a salt barrier and its water and salt movement law has been studied
In terms of material cost alone, the price of biochar is higher than that of the traditional gravel salt barrier, but the preparation of biochar takes agricultural and forestry wastes as raw materials, which is an effective way for the resource utilization of agricultural and forestry wastes, and can play a huge ecological benefit in reducing carbon emissions
Summary
The accumulation of salt in soil and groundwater threatens agricultural production and its sustainable development [5,6]. The increase of soil salt content and salinization area lead to the salinization of fertile land, the sharp decrease of crop yield, the change of land planting adaptability, and even fallow and fallow in the region [7,8,9]. It is urgent to fully tap the potential of such areas in agricultural production and ecological greening through economic and effective original soil improvement measures. Salt separation layer + concealed pipe drainage is a more effective and commonly used engineering measure in saline alkali land treatment. Through the research and development of supporting new materials and processes, constantly improving the technical system can greatly promote saline alkali land treatment
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