Study On The Optimized Coupling Pattern Of Agriculture Land Eco-economic System In Zhifanggou Watershed

Zhifanggou watershed was the typical representation in Loess Plateau, which ecological and economic system through the "damage - fix" the complete process. Although ecological environment and economic conditions had been greatly inproved as the result of state measures over years, consistency of agriculture industry and resource was poor, contrary to economic and ecological system.The paper study on coupling relationship and trends of zhifanggou agriculture land eco-economic system by interdisciplinary guidance on systems theory, land ecology and land science in order to solve the contrary status. Finally, proposed for the optimal development of the region coupled model by compare system development in different status. The studies show that nearly 70 years the function of agricultural land in the basin has undergone major changes, the current agricultural land coupled ecological economic system is running the state, strengthening the "feeding + rotational grazing" chain network structure is conducive to building positive coupling system. The following conclusions:(1) With the evolution of agricultural eco-economic system, agricultural land function through the evolutionary process: "survival of the ecological functionâ†'income, employment featuresâ†'ecology, the main function of income".Agricultural land use patterns have also experienced forest land to cultivated land transfer to the garden and woodland. This evolution is mainly affected by population, the peasants demand, agricultural efficiency and the impact of the national macro-control policies.(2)Agriclture eco-ecological system coupling appeared resource-constrained industry and industry Stress Resources. The number of cultivated land, pasture utilization, fertilizer application rate, population density, per capita arable land, irrigation rate can be constrained agricultural development in the main factors; Income effect is an important factor in impact of layout and use of industrial agricultural land resources.(3)he watershed sampling survey sample based on the coupling of basic values between 0.5 and 0.8, the system coupling development trend in the running coupling. Geographical conditions and the distribution of agricultural land resources affected farmers as an important factor in agricultural production, but also the development of the agricultural industry with regulatory role, and relevant national policies on the development of regional industry plays an important role in guiding and constraints.(4) Compare to the status quo scenario, "feeding + rotational grazing" scenario and stop Return Cultivated Land to Forests scenarios showed that: "feeding + rotational grazing" scenario optimization program is agricultural land in zhifanggou watershed of economic System coupling direction. This not only enhances the related degree between resources and industry, while also increase farmer's income under the premise of ensuring the premise of the existing environment.(5)Expansion of grassland area, strengthen the "feeding + rotational grazing" chain network structure, expansion of agricultural production scale and enhance the development of the industry in order to achieve optimization of agricultural land ecological and economic benefits.