Research Based On The The Qianwei Land Of The Ecological Services Value Of The Use Of Structural Optimization

As one of the scarce natural resources, the land is not only the foundation of human survival and development but also is an important producting material. With the growth of the population and the development of social economy, the conflict between population and land becomes more and more sharp.Besides, the environmental problem also appears followed.The fact that is continuous increase of populationg and the acceleration of the process of urbanization results in the problem of land use, the quality of land is declining, the ecological environment is becoming worse, which restricts the sustainable development of economy. So we have to reexamine the relationship between nature and human in order to seek sustainable and coordinative development of economy, society and environment.Actually, the existence of these problems is nearly related to irrational land use structure, so the optimization of land use structure is becoming more and more necessary.In this paper, based on the2001-2010land use change survey data, taking quantitative and structural changes in land use, land use dynamics, the rate of relative changes in land use as four indicators, analysising on the Land use change characteristics of Qianwei in10years, calculating the number of land-use changes in amplitude, speed, studying the Service value of the land ecosystems and its change of the Qianwei in10years, revealing the driving mechanism of the changes in the value of ecosystem services, establishing the land-use mode based on the value of ecosystem services and economic benefits at the same time to maximize, getting reasonable land use structure by the land-use mode, the main conclusions are as follows:(l)The overall land use changes of the Qianwei county showing the features of four growth and two reductions. Specific manifested as the increase in cultivated land, forest, garden, industrial land, town village, and the area of unused land and other agricultural land is reduce; dynamic changes in the most obvious is the woodland and agricultural land is16.99%and64.09%.(2) The waters Per unit area value of ecosystem service is maximum.followed to forest, forest and farmland ecosystem services is the amount of the contribution of the total value of.Accounting for more than94%of the total value of ecosystem services. The Qianwei the townships of ecological carrying capacity and land ecological services value ranking is basically the same, and with the township covers an area proportional to.(3) The Qianwei calendar year, the value of ecological services the total trend of instability, but on the whole increased from1,481,638,600yuan in2001to2,051,162,300yuan in2010.02-04years and05-07years appear the decline of small amplitude.(4)2001-2010, various land use types of ecosystem services value trends for:Woodland ecosystem services value of the overall increasing trend, and the largest increase; the value of farmland ecological services in other years show an increasing trend besides downward trend in changes in the2002-2004years; construction land, unused land, grassland, and waters of the value of ecosystem services are a declining trend.(5)The value of ecosystem services change mechanism is the main policy factors, demographic factors, natural factors and the level of economic development factors. Naturally, population and economic development changes in the value of ecosystem services have a negative effect.(6) By constructing a multi-objective linear programming model based on the value of ecosystem services. According to the model for solving optimization programs, constract the optimization program with the status quo after the adjustment years: forest coverage is to continue to improve the ecological environment improved. Land utilization; From the value of ecosystem services, Qianwei optimize land use of the total value of ecosystem services19276221yuan, more than2005Qianwei1,596,480,800yuan, indicating that the optimization of ecological benefits is better than the current status.(7) Based on the distribution of Qianwei land use> dividing into ecological functional areas, providing the safeguards for the land use structure optimization of Qianwei county.