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Agroforestry system is a traditional land use and management methods, because of its biological productivity, improve agricultural ecological environment and make full use of resources, increase farmers' income, realize the great potential of the sustainable development since the mid-1970s of the last century since, to get people more and more attention. As the agroforestry systems community types a fruit crop intercropping is more common in the Three Gorges Reservoir Area, especially the last decade, the fruit trees have a higher economic efficiency, fruit crop intercropping than the reservoir area farmers welcome. Three Gorges Reservoir less arable land resources are very tight, and is an immigrant, poverty alleviation and environmental governance the triple task rolled into one special area, and therefore change the traditional land use patterns, scientific and rational development of sloping land agro-forestry systems, has important practical significance. In this study, based on field investigation and laboratory analysis, the use of the ecology, ecological economics principle new the pear - upland rice composite system biomass and productivity of the Three Gorges Reservoir slopes energy flow, material recycling and land utilization system and in-depth analysis of its ecological and economic benefits. The innovation of this paper First First study crops in agroforestry systems trees rhizosphere soil AMF diversity and root AMF colonization rate impact, is the first of the Three Gorges Reservoir Area sloping clean tillage Liyuan contrast, China Three Gorges Reservoir the hillslope pear - upland rice composite system ecological economic analysis, which is scientific and reasonable development of the land resources of the Three Gorges Reservoir Area, biological resources provide important scientific evidence and ways of doing business. The results showed that: 1. The pear - upland rice composite system is a multi-component, multi-level, multi-function, multi-effective artificial composite system. Upland rice intercropping Liyuan and Stalk, not only can improve the sloping the Liyuan small climate bad environment can be a good cooling moisturizing effect in high temperature summer drought; reduce soil erosion and can change the physical properties of the soil, improve soil available nutrients content, effective control of weeds in the field, and also increase the pear tree rhizosphere of arbuscular mycorrhizal diversity. While increasing the the pear leaf chlorophyll content and photosynthetic rate to improve the intrinsic quality of the fruit. 3 with a single system, the composite system can improve the land utilization rate of 44%, more full use of the reservoir area of ??natural resources. 4 pears - upland rice composite system unit area value 93060 yuan · hm -2 , net income of 9560 yuan · hm -2 , a clearer improve unit area output value of farming Liyuan 12.8%, net income increased by 18.04%, revenue cycle is two years in advance. 5 pear - upland rice composite system total biomass is 23637.130 kg · hm -2 the Liyuan of 1.76 of the clean tillage
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