Ludian County Land-use Change And Ecological Security Assessment Research

Land resource is one of the orreplace resources which the human being relies on .The production of human life is inseparable from the issue of land use. In recent years, with the rapid economic development, human scale and intensity of land use continue to expand and deepen, and thus the whole ecosystem structure and function of the impact of causing substantial. In this context, the conduct of county land use ecological security evaluation and empirical research has far-reaching historical significance and practical significance. Therefore, this article Choose a typical ecological fragile region as the research object Ludian County of Yunnan Province, through the collection of historical maps, government statistics, integrated AHP and the comprehensive scoring method in the study area between 2000 -2008 the land use Changes in conditions and this change impacts on ecological security an empirical analysis. The main contents and conclusions are as follows:1.Ludian county land use change analysis. This paper analyzes the Ludian county land use types of structure and regional differences, the changing circumstances. The results showed: Structural change, reduce the proportion of arable land up from 33.41% in 2000 fell to 31.44% in 2008, reducing by 1.97%; volume change, reduction of a total of 2931.7 hectares of cultivated land, grassland area decreased 3199.6 hectares, which reduced The number of first place, and this corresponds, woodland, garden, construction land increasing year by year; land use of regional differences, Agricultural land and non-agricultural land varies by less than the magnitude of the overall change is the Le hong Township, Wen Ping Town, Taoyuan Township, and agricultural land and non-agricultural land were higher than the overall rate of change of amplitude; the degree of land use,land-use index values decreased from 229.73 in 2000 to 228.76 in 2008.2. Ludian County Land Resources Evaluation of Ecological Safety. From the perspective of ecological safety, in the use of pressure - state - response (PSR) conceptual model based on the framework, in accordance with the principle of hierarchy analysis to construct a 25 index contains Ludian land evaluation system of ecological security; to Established evaluation criteria, AHP, comprehensive evaluation method of ecological security Ludian dynamic ecological security status were evaluated. Calculated Ludian County in 2000, 2004, 2008, the value of ecological security of the Land-use, found that a few years Ludian ecological security of land use rose from a risk-sensitive state of the state, the reason for the evaluation of the results .3. Ludian County, sustainable land use recommendations of the ecological safety measures. Based on the above analysis, in order to achieve sustainable use of land Ludian County to meet its ecological safety purposes, the paper from the Ludian County land-use and ecological security of the actual situation, combined with the county's natural, Economic and social development, puts forward corresponding countermeasures and suggestions to better achieve Ludian land ecological security objectives.