Construction method of soil erosion control system for mulberry trees in purple soil dry sloping land in the Three Gorges Reservoir area

Abstract

The invention discloses a construction method of a system for preventing and controlling water and soil loss of white mulberries in purple-soil dry slope land of the Three Gorges reservoir region. An ecosystem for preventing and controlling water and soil loss is constructed by the mode of planting white mulberries. The method comprises following steps of: 1), selecting purple-soil dry slope land of below 25 degrees and over 3cm in width and constructing multiple cross slopes along contour lines; planting white mulberries on partial cross slopes in order to form mulberry strips; gradually increasing the strip distance between adjacent mulberry strips from the lower end to the top of the purple-soil dry slope land such that the overall strip distance is dense at the upper part and is loosen at the lower part; wherein lengths of mulberry strips is the same as the width of the purple-soil dry slope land; 2), planting crops on cross slopes between every two cross slopes planted with white mulberries; and 3) dwarfing and pruning white mulberries in the step 1) regularly each year. The construction method of system for preventing and controlling water and soil loss of white mulberries in purple-soil dry slope land of the Three Gorges reservoir region has following beneficial effects: fine ecological suitability and anti adversity capability are obtained; by adopting the mode of using mulberries as fences, the white mulberry system in purple-soil dry slope land of the Three Gorges reservoir region is constructed so that good ecologic and economic benefit are obtained.

Description

technical field [0001] The invention belongs to the technical field of agricultural environmental pollution control, and specifically relates to a method for constructing a soil and water loss prevention and control system for mulberry trees in purple soil and dry slopes in the Three Gorges reservoir area. Background technique [0002] Soil erosion leads to the decline of soil fertility and water storage capacity, which is the "source" of agricultural non-point source pollution and water eutrophication. The dry slope land with purple soil in the Three Gorges Reservoir area is a high-incidence area of ​​soil erosion. The soil erosion of dry slope land is mainly affected by internal factors and external factors. , planting patterns and vegetation coverage. [0003] At present, domestic and foreign measures to prevent and control soil erosion on dry slopes are mainly divided into engineering measures and ecological measures. Engineering measures include building water-blockin...

AI Technical Summary

Problems solved by technology

Engineering measures include building water-blocking ditches, hillside intercepting ditches, slope water storage projects, and terraced fields. Such measures can achieve the purpose of water and soil prevention and control to a certain extent by retaining soil and water storage, but there are problems such as large amount of engineering, time-consuming and labor-intensive problems. Disadvantages such as unsatisfactory economic and ecological benefits

Ecological measures are divided into soil measures and agricultural measures. Soil measures refer to the application of chemical compounds such as soil improvers and fixatives to the soil to achieve the purpose of improving soil structure, fixing soil, and reducing soil erosion. Such measures to a certain extent It makes up for the time-consuming and labor-intensive shortcomings of engineering measures, but there are also problems such as high labor costs and high ecological risks; agricultural measures are water and soil prevention and control measures implemented on the basis of following the ecological material cycle, including deep plowing, contour plowing, and crop residues. Covering, ridge crop field and hedgerow, etc.

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