Transverse-furrow and sequential-ridge mellow soil anti-erosion farming method of purple soil slope farmland

Abstract

The invention discloses a transverse-furrow and sequential-ridge mellow soil anti-corrosion farming method of a purple soil slope farmland and particularly relates to the field of a soil erosion management technique of the purple soil slope farmland. In the method disclosed by the invention, a transverse furrow is excavated along the contour line on the purple soil slope farmland at the slope length interval which is less than the rill erosion generation critical length of the modified slope surface; the cross section of the transverse furrow is in an arc shape; the formed transverse furrow divides the whole slope farmland plot into multiple small farming units in the transverse slope direction; the two ends of the transverse furrow are connected with the original drainage furrows at the two ends of the slope farmland plot; and the integral farming terrain conditions with alternate furrows and ridges are formed by adopting a sequential-slope ridging farming mode, i.e. alternately farming and ridging in the sequential slop direction and reverse slop direction. The method disclosed by the invention can reduce the water and soil loss and prevent and control the soil erosion of the slope farmland, is beneficial to the enhancement of the water content in the soil of the farmland plot in the descending direction of the transverse furrow, improves the drought resistance of crops, maintains the agricultural productivity of the slope farmland and realizes the sustainable utilization of slope farmland water and soil resources.

Description

technical field [0001] The invention belongs to the technical field of water and soil loss control of purple soil sloping cultivated land, and in particular relates to a method for water and soil conservation farming of the horizontal ditch and ridge and the mellow soil anti-corrosion type for dividing the slope length of sloping farmland, dispersing surface runoff, and reducing water and soil and nutrient loss. Background technique [0002] Purple soil is a unique soil resource in my country, with a distribution area of ​​21.988 million hm 2 , of which 18.891 million hm of dry land 2 , 3.097 million hm of paddy field 2 , mainly distributed in Southwest China, and also partially distributed in South China. The purple soil is soft in texture, poor in structural stability, low in organic matter content, and poor in corrosion resistance. It is an erosive type of high-productivity lithologic soil. The purple soil area in my country has strong soil erosion and serious land deg...

AI Technical Summary

Problems solved by technology

However, the construction and maintenance costs of terraced fields are high, and the applicability of popularization is poor. It is urgent to develop low-cost, high-efficiency alternative methods for preventing and controlling slope soil erosion.

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