Saline-alkali soil salinity leaching negative pressure concealed pipe drainage system and method

Abstract

The invention belongs to the technical field of cultivated land resource protection, and discloses a negative pressure concealed pipe drainage system and method for soil salinity leaching. The concealed pipe drainage system for saline-alkali soil salinity leaching is provided with a negative pressure drainage device; a negative pressure concealed pipe drainage device is connected with a water suction pipe through a connecting pipe, and the water suction pipe is buried in saline-alkali soil. The negative pressure concealed pipe drainage device is connected with a saline water storage evaporation pond through a water conveying pipe and connected with a negative pressure control switch, the negative pressure control switch is connected with a negative pressure meter, and the negative pressure meter is fixed to a cultivated land surface. The negative pressure concealed pipe drainage device is provided with an air pump, a motor and the connecting pipe, and the motor is connected with a solar wind power generator. According to the negative pressure concealed pipe drainage system and method for soil salinity leaching, the negative pressure concealed pipe drainage system is mainly composed of a concealed pipe drainage pipeline and a negative pressure air and water extraction system, wherein the concealed pipe drainage pipeline is buried in a certain depth of cultivated land soil and has certain water permeability. If the negative pressure concealed pipe drainage system is widely used in an agricultural planting area of the extremely water-deficient saline-alkali soil, the system method with the great outcome can be used for obviously improving the leaching efficiency of soil salt.

Description

technical field [0001] The invention belongs to the technical field of cultivated land resources protection, and in particular relates to a system and method for improving the efficiency of soil salt leaching in saline-alkali land. Background technique [0002] Xinjiang is one of the largest cotton-producing areas in China. It is located in the arid inland of the Northwest, and there is a serious shortage of water resources. The extremely dry climate makes it the main distribution area of ​​soil salinization and secondary salinization in China. Soil salinization Globalization and water shortage have brought great challenges to regional agricultural production. In order to meet the needs of crop growth, in order to adapt to local soil cultivation, crop planting, saline-alkali land improvement and rational use of water resources, soil salt leaching during the non-growing period is generally used at present, which is an effective irrigation system formed through long-term exper...

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Problems solved by technology

[0006] The existing underground pipe technology mode has a very limited amount of salt discharge under the traditional leaching mode. Under such conditions, when the traditional underground pipe laying method is directly used in combination with flood irrigation and pressure salt, the materials, specifications and structures of the underground pipes will be affected. Conditions are limited, the confluence area of ​​the underground pipe is small, and the efficiency of drainage and salt discharge is low. It is necessary to explore the improved mode or method of salt discharge of the underground pipe in saline-alkali land in Xinjiang to effectively improve its salt discharge efficiency

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