Analysis On Temporal-spatial Change Of Cultivated Land Intensive Use In Chang-Zhu-Tan Region

Cultivated land is the essence of land, is an irreplaceable human society material wealth, but as a scarce resource, its quantity is limited. Chang-Zhu-Tan region as the key area of economic development and land supply in Hunan province, the level of economic activity is high and the contradiction between people and land is day by day prominent. Analysis on temporal-spatial change of cultivated land intensive use in Chang-Zhu-Tan region could provide a scientific basis for provide a scientific basis for solving the contradictory between people and land, the same is of great significance to promote the intensive use of cultivated land resource and sustainable utilization.After learning the research results of intensive use of cultivated land resource in China and foreign, established a index system of cultivated land use intensity evaluation to evaluate cultivated land use level of12counties in Chang-Zhu-Tan region from2001to2011based on the "Pressure-State-Response" model. Qualitative analysis and quantitative analysis on the diffrence in temporal and spatial variation of cultivated land use intensive degree in12counties of Chang-Zhu-Tan region. Finally based on the above analysis and related research results in China and foreign, put forward some countermeasures and suggestions to improve the level of intensive use of cultivated land in12counties of Chang-Zhu-Tan region. The main conclusions are as follows:Firstly, the temporal characteristic of cultivated land intensive use level in Chang-Zhu-Tan region was obvious. From2001to2005the intensive degree of cultivated land declining slow, from2005to2008the intensive degree of cultivated land rising steadily, from2008to2011the intensive degree of cultivated land declining rapidly. From2001to2011, each county the intensive degree of cultivated land had decreased in different degree, except Liling County, Ningxiang County, Xiangtan County, Wangcheng County, Shaoshan County and Chaling County.Secondly, spatial distribution of cultivated land intensive use level difference in Chang-Zhu-Tan region was remarkable. In2011, Changsha County and Xiangtan County were in a state of highly intensive degree; Xiangxiang County, Wangcheng County, Liuyang County, Shaoshan County, Ningxiang County, Zhuzhou County, Liling County, Youxian County and Chaling County were in a state of middle intensive degree; Yanling was in a state of low intensive degree. In general, the characteristic was higher in north area and lower in south area.Thirdly, spatial agglomeration phenomenon of cultivated land intensive use level in Chang-Zhu-Tan region was evident. With Changsha County, Wangcheng County and Xiangtan County as the center, formed a level of cultivated land intensive use of high-high concentration distribution in the north. With Chaling County and Yanling County as the center, formed a level of cultivated land intensive use of low-low concentration distribution in the south.Fourthly, the change trend of PSR system coordination degree was consistent with the change trend of intensive degree of cultivated land in Chang-Zhu-Tan region. In terms of it, want to raise the level of intensive utilization of cultivated land must to raise pressure-state-response degree of coordination between the three indices.Fifthly, the county which has a higher intensive level of cultivated land should play the centripetal effect of cultivated land intensive utilization of high concentration, further improve the level of intensive utilization of cultivated land; the county which has a middle intensive level of cultivated land, should with a small amount of cultivated land in exchange for greater economic benefits, to improve the level of intensive utilization of cultivated land steadily; the county which has a lower intensive level of cultivated land should regard the ecological safety as the priority, to enhance the level of intensive utilization of cultivated land in small increments.