Method for improving saline-alkali soil and soil ditch structure

Abstract

The invention discloses a method for improving saline-alkali soil and a soil ditch structure, and belongs to the technical field of soil improvement. The method is characterized in that: a soil ditch convenient for drainage is constructed by using the property that salt and alkali are dissolved in water, and soil improvement is realized; and the method comprises the following steps of: determining an improved saline-alkali soil plot, digging a drainage open trench, and constructing the soil ditch convenient for drainage and capable of preventing a ditch wall from collapsing. In the soil ditch structure, nearly vertical thin bamboo or cut oblate bamboo is tightly attached to the wall of the soil ditch and longitudinally and transversely interwoven into square or oblong bamboo raft baffles; and the two sides of the vertical bamboo raft baffles are provided with overlapped pressed edges, the bamboo raft baffles are fixed by vertical wood piles at intervals, and the bamboo raft baffles are transversely supported by bamboo or wood sticks between the soil walls of two sides. The salt in the soil can be effectively reduced, and the salt in the soil of the upper layer is quickly flushed to the soil of the lower layer by irrigation or rainfall and discharged out of the soil together with the underground water; and the structure is simple, the cost is low, the operation is simple and convenient, and the effect is obvious.

Description

technical field [0001] The invention belongs to the technical field of soil improvement, and specifically relates to a method for controlling and improving saline-alkali soil. Background technique [0002] Saline-alkali soil refers to the general term for various types of soil that contain excessively high saline-alkali components in the soil, including saline soil and alkaline soil, and other types of soil that have undergone a certain degree of salinization or alkalization. Soil salinization is a worldwide resource and ecological problem. The area of ​​saline-alkali soil in my country is 3.5×10 7 hm 2 . Water-soluble salts in soil include different ions such as Cl - , SO 4 2- , CO 3 2- 、HCO 3 - 、Na + 、K + , Ca 2+ , Mg 2+ Wait. Typically, they are in the soil solution as nutrients. Salt occurs when these ions are present in concentrations sufficient to adversely affect soil properties and plant growth. Salt dissolves in water, and the dynamic law in soil can...

AI Technical Summary

Problems solved by technology

The hidden pipe salt discharge method has problems such as large investment and easy blockage of the hidden pipe

Open ditch salt drainage uses cement, stones, etc. to construct drainage ditches. This kind of salt drainage ditch cannot discharge water in the soil because there are no pores in the ditch wall.

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