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

A technology of purple soil slopes and horizontal ditches, which is applied in the field of horizontal ditches along the ridges, mellow soil erosion-resistant soil conservation farming, can solve the problems of high terrace construction and maintenance costs, and poor applicability for promotion, so as to reduce soil erosion and erosion Intensity, the effect of reducing the amount of accumulation

Inactive Publication Date: 2011-11-16
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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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.

Method used

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

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[0021] The purple soil slope cultivated land in the Three Gorges Reservoir area accounts for 78.4% of the cultivated land resources, and is the main carrier of agricultural production. The purple soil type is mainly Jurassic Shaximiao Formation with neutral or alkaline pH. The landform types in the purple soil distribution area are mainly low-medium mountains, hills and river valleys. The climate belongs to the subtropical humid monsoon climate, with four distinct seasons and abundant rainfall. The annual rainfall is 1000-1800mm, and the rainfall is mainly concentrated in summer. The important social characteristics of this area are the backward economic level and the prominent contradiction between man and land. Intense anthropogenic farming activities combined with the concentrated rainfall in the Three Gorges Reservoir area make the purple soil slope farmland strong soil erosion, serious soil erosion, and become the main source of sediment in the Yangtze River, threatening...

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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 soil and water loss control of purple soil sloping farmland, and particularly relates to a horizontal ditch and ridge, mellow soil erosion-proof soil and water conservation tillage method for dividing the slope length of sloping farmland, dispersing surface runoff and reducing water, 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 ha of dry land 2 , paddy field 3.097 million hm 2 , mainly in the southwest of China, and some in southern China. Purple soil is soft in texture, poor in structural stability, low in organic matter content, and poor in corrosion resistance. It is an erosion-type high-productivity lithological soil. my country's purple soil area is one of the main areas of hydraulic erosion in my country, with strong soil erosion and serious land degradation. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/00
CPCY02A40/22Y02P60/20
Inventor 唐强贺秀斌鲍玉海
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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