Reconstruction method of plough layer of waterlogging farmland

Abstract

The invention discloses a reconstruction method of a plough layer of a waterlogging farmland. The method comprises the following step of sequentially spreading a water permeable layer, a filtering layer, a soil dressing layer and a surface soil re-covering layer from top to bottom from an excavation surface of the bottom surface of the plough layer to the surface of a previous plough layer, wherein the water permeable layer is composed of coarse sand; the filtering layer is composed of straws; the soil dressing layer is composed of soil outside the previous plough layer; and the surface soil re-covering layer is composed of soil of the previous plough layer. The reconstructed plough layer of the farmland can guarantee a drainage function of the waterlogging farmland and also can improve the ventilation and water permeability of the soil; and the adaptability to a crop growth environment is considered, longitudinal and transverse water drainage of water is effectively solved, and the drainage coefficient of the farmland is improved.

Description

technical field [0001] The invention relates to a method for reconstructing soil structure of plowed layer in water-logged farmland, and belongs to the technical field of improving cultivated land quality. Background technique [0002] Waterlogged farmland is one of the main targets for the transformation of low-yield fields in southern my country. Topography and hydrological conditions are the main causes of farmland waterlogging. Due to long-term immersion in cold water, low temperature of water and soil all year round or combined with loose soil layer, it seriously affects the growth of crops. normal growth. The cultivated layer refers to the topsoil layer that has been cultivated and matured, usually with a thickness of 20-30cm. It has the characteristics of relatively rich nutrient content, the most dense crop root system, and large seasonal differences in water and available nutrient content. [0003] At present, in the reconstruction of waterlogged farmland, drainage...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the fact that the existing only relying on drainage ditches for field drainage, the soil aeration and water permeability of the cultivated layer of waterlogged farmland will still gradually deteriorate, resulting in that the excess water in the soil is still difficult to discharge, resulting in Defects of long-term waterlogging of farmland

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