A greening method of original soil in heavy saline-alkali land

Abstract

The invention relates to a method for greening original soil of heavy saline-alkali land. The method comprises the following steps: digging and filling by a machine to form a tamarisk planting groove, planting tamarisk seedlings in the groove, digging to form a vertical drainage ditch at a certain distance along the direction of the groove, forming a rectangular-ambulatory-plane drainage ditch around the periphery of a planting area, deepening two ends of the vertical drainage ditch into the rectangular-ambulatory-plane drainage ditch area, and building a weir on the outer side of the ditch. According to the method for greening the original soil of the heavy saline-alkali land, the salt elimination engineering is not carried out; the soil is not improved and is just simply dug and filled by the machine; soil salt factors are reduced and discharged by using the terrain advantage according to the soil water salt migration mechanism; the environment suitable for growth of plants is formed; the construction engineering quantity is greatly reduced; the application of the exogenous material is greatly reduced; the construction period is effectively shortened; the cost is low; the maintenance is simple.

Description

technical field [0001] The invention relates to a method for greening original soil of saline-alkali land, in particular to a method for greening original soil of heavy saline-alkali land. Background technique [0002] my country is rich in saline soil resources, with an area of ​​99.13 million hectares of saline-alkali land, which are widely distributed in coastal areas, northwest inland, Huanghuaihai Plain, Northeast Songnen Plain, Gansu, Ningxia and Inner Mongolia. When the soil salinity is >20g / kg, affected by the high salinity, under natural conditions, the ground is basically in a bare state, and it is difficult for plants to survive. The existing technical approach for native soil greening of heavily saline-alkaline land mainly uses underground drainage. The comprehensive integration technology of salt engineering, soil in-situ improvement engineering and salt-tolerant plant screening has a large amount of construction work, high cost and long period, and the requi...

AI Technical Summary

Problems solved by technology

When the soil salinity is more than 20g / kg, affected by the high salinity, under natural conditions, the ground is basically in a bare state, and it is difficult for plants to survive. The existing technical approach for native soil greening of heavily saline-alkaline land mainly uses underground drainage. The comprehensive integration technology of salt engineering, soil in-situ improvement engineering and salt-tolerant plant screening has a large amount of construction work, high cost, and long period, and the requirements for post-maintenance management are high and the tasks are heavy, so it is not suitable for large areas of heavy saline areas. Therefore, there is an urgent need for a low-cost, short-cycle, simple construction and maintenance of heavy saline-alkaline original soil greening technology

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