A method suitable for improving saline-alkali land in arid and semi-arid areas
A semi-arid, saline-alkali land technology, applied in the direction of soil preparation methods, applications, and soil lifting machinery, can solve the problems of wasting topsoil resources, unsustainable effects, and treating symptoms rather than root causes, achieving a high degree of resource utilization, long-lasting effects, and improved The effect of soil texture
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Embodiment 1
[0055] The saline-alkali land improvement method of the present invention is firstly tested on a landscaping land in the arid and semi-arid area of Northwest China. The test site area is 5000m 2 , the phenomenon of salt accumulation and return to salt appears on the surface, which belongs to heavily salinized soil.
[0056] The following technical steps are adopted for improvement:
[0057] (1) Strip 30-50cm of soil from the top layer according to the land use and place it separately, then roll the bottom soil to form the bottom layer (1), until it does not settle, and the top soil (5) stripped from the top soil should be shallow Some, but not less than 30cm; deep and fertile soil, the stripped topsoil (5) is then deeper, but not thicker than 50cm.
[0058] (2) Arrange drainage ditches for the treatment site on the rolling bottom layer (1), and the bottom of the drainage ditch is 20cm lower than the plane of the rolling bottom layer (1).
[0059] (3) Pave and fill the cla...
Embodiment 2
[0071] The saline-alkali land improvement method of the present invention is firstly tested in a saline-alkali farmland in the arid and semi-arid area of Northwest China. The area of farmland for testing is 1500m 2 , the site is flat, the soil layer is deep, the soil condition is relatively uniform, and the surface layer occasionally has the phenomenon of salt accumulation and return to salt, which belongs to severely salinized farmland soil.
[0072] The following technical steps are adopted for improvement:
[0073] (1) According to the land use, peel off the 20cm soil of the top layer and place it separately, and then roll the bottom soil to form the bottom layer (1) until it does not settle.
[0074] (2) Lay drainage ditches for the treatment site on the rolled bottom layer (1), and the bottom of the drainage ditch is 25cm lower than the bottom plane.
[0075] (3) Pave and fill the clay layer (2), with a thickness of 12cm, remove hard objects therein, compact and fla...
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