Open trench-concealed conduit combined water discharging and salt reducing method

Abstract

The invention discloses an open trench-concealed conduit combined water discharging and salt reducing method, and belongs to the technical field of saline-alkali soil improvement. The method comprises the following steps of: selecting a field, digging a salt-controlling water discharging concealed conduit trench and a water collection conduit trench, laying a water-resisting layer, burying a salt-controlling water discharging concealed conduit and a water collection conduit, connecting the salt-controlling water discharging concealed conduit and the water collection conduit, backfilling the salt-controlling water discharging concealed conduit trench and the water collection conduit trench, reconditioning mounds, digging an open trench, perforating, applying soil fertility fertilizer, and managing the salt-controlling water discharging concealed conduit and the water collection conduit. By adopting the open trench-concealed conduit combined water discharging and salt reducing method, the water retention, fertility retention and temperature increase can be facilitated, the soluble salt ions can be rapidly leached below a plough layer, the salt ions leached to the soil deep layer are not moved to the surface soil along with the water, so that an effect of reducing the salt content in the surface soil can be realized; and by virtue of the method, the water drainage is facilitated, the leaching efficiency of the salt content in the plough layer is greatly increased, and the salt content in the soil is greatly reduced.

Description

technical field [0001] The invention relates to a method for draining and reducing salt by combining an open ditch and a hidden pipe, and belongs to the technical field of saline-alkali soil improvement. Background technique [0002] China currently has 100 million hectares of saline-alkali land, most of which are distributed in arid and semi-arid regions such as North China, Northwest and Northeast China, mainly including Xinjiang, Qinghai, Gansu, Ningxia, Shaanxi, Inner Mongolia, and northeast Shanxi. Most of them belong to the Yellow River system, and the groundwater level is significantly affected by the Yellow River system. The groundwater level is high. The local drinking wells are generally around 20m, and the groundwater level is around 2m. The main soil types are saline soil and aeolian sand, which are developed on the parent material of aeolian sand. The juvenile soil contains a lot of soluble salts, the rainfall is low, the annual average is about 180mm, the light...

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to solve the problems of low leaching efficiency of soil salinity in saline-alkali plow layer, insignificant effect of reducing the salinity of plow layer soil in saline-alkali land, poor water-saving effect, high operating cost, and unfavorable application and promotion in the current saline-alkali land improvement technology. problem, to provide a method of drainage and salt reduction combined with open ditch and hidden pipe