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
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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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