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Structure and Construct Mode of Terrace and Hedgerow in Sloping Farmland in the Three Gorges Reservoir Area

Author: LvWenXing
Tutor: ZhangHongJiang
School: Beijing Forestry University
Course: Soil and Water Conservation and Desertification Combating
Keywords: Field ridges Hedgerows Soil physical and chemical properties Soil erosion resistance Patter Three Gorges Reservoir Area
CLC: S157
Type: Master's thesis
Year: 2011
Downloads: 64
Quote: 1
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Abstract


Sloping land as the Mountain, Mid-levels of agricultural production resources, and played an important role in the protection of the life of the people, the development of the rural economy. Three Gorges Reservoir slope farmland soil erosion and land degradation is very serious, and has become one of the important issues affecting the ecological environment in the reservoir area. So the analysis of the structure and function of the sloping land of the Three Gorges Reservoir Area \Combined with the national \The undisturbed soil erosion sink method the impact experiment as well as indoor soil properties conventional analysis methods to analyze the structural characteristics of the the slope land \construction mode. The main conclusions are as follows: (1) the main types of banks of earth including earth mound, stone ridge, Debris the mixed ridge and biological field ridges, in accordance with the formation of different ways divided into the artificial built and natural form two. Biological ridge and soil ridge the distribution relatively large, stone ridge and rock mixture ridge distribution relatively small field ridges on the type of overall performance. The land ridge height and sloping land slope was a significant negative correlation. (2) occupy the total number of sample sites (49) 82% of the mulberry trees, citrus, pepper, Huang Jing of fimbristipula Hance five typical hedgerow improved soil physical properties are in varying degrees. Hedgerow plots soil nutrient indicators performance of different locations with highest and lowest interband belt and taken off in between. Different hedgerow with the strength of the soil erosion resistance: Wong Jing (79.2%) of gt; citrus (36.4%) gt; the Mulberry (22.4%) gt; pepper (18.9%) gt; Begonia fimbristipula Hance (15.3 %) gt; CK (control treatment) (8.7%), the hedgerow with soil erodibility index as the soil particles increase in the soaking time is reduced, both showed a cubic polynomial function relationship. Soil erosion resistance strength of: citrus (92.50%) gt; pepper (92.00%) gt; the mulberry (83.17%) gt; Huang Jing (82.18%) gt; Begonia fimbristipula Hance (76.77%) gt; CK (18.88%). (3) The the field ridges hedgerow configuration mode including: the field ridges of a single tree species hedgerow mode, the field ridges shrubs, hedgerows single mode, the field ridges single herb Lei \Mixed hedgerow \Jiangjin District Select the soil ridge single species of trees (or arbor Mixed) the hedgerow \The Zigui County Select \

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CLC: > Agricultural Sciences > Agriculture as the foundation of science > Soil > Soil and Water Conservation
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