Research On Land Ecosystem Health Based On Matter-element Model In Poyang Lake Ecological Zone

Eco-Economic Zone of Poyang Lake is located in the South Bank of the lower reaches of the Yangtze River, and it plays an important role in the rise of central China strategy. But in recent years, in the Eco-Economic Zone, in drought occurs frequently, Poyang Lake water condition gradually deteriorated, biodiversity is decreasing, ecological functions are decreasing. This is not only a threat to the survival of local residents, living environment, and to a certain extent, restricted the sustainable development of Ecological Economic Zone in Jiangxi province and even the whole. Therefore, it has the important meaning and role model for the evolution of the ecological environment of Jiangxi province that exploring the status of the ecological environment and Dynamic variation, or doing some evaluations of the current situation of land ecosystem health.Firstly, this paper analyzed status of land use and the dynamic change (in the years2000-2010) in the Ecological Economic Zone from the perspective of time and space, while it made a qualitative analysis on the of land ecosystem health in Eco-Economic Zone by the ecological service value per unit area ecosystem, which paved the way for the following evaluation; then, we explained the concept and evolution mechanism of land ecosystem health, Combining with the P-S-R model, which is one of the international for one of the representative of land ecosystem health assessment of the results, and We conducted a brief exposition on the interaction between P-S-R; finally, we established the index system of land ecological system health assessment of pressure state response by using variation coefficient method and entropy method, and on this basis, matter element model of health assessment was built to evaluate land ecosystem health in Eco-Economic Zone from the time and space scale.Results show that, In2001-2010, in addition to the2005year, the land ecological system of ecological economic zone is in sub-health state, the rest are in a healthy state;but in2010year,in addition to areas, including Yingtan City, Jingdezhen city and The urban area of Fuzhou City, Land ecosystems in other regions are in the sub healthy state of the above, which shows that the land ecosystem health status of Ecological Economic Zone has threatened to some extent, and a certain extent, this has restricted the sustainable development the target, we should make corresponding policy to improve the land ecosystem health.