煤炭开采对矿区农田生态系统生态服务功能影响评价

o reveal influence mechanism of the ecological service function of cropland ecosystem caused by coal mining, we quantitatively estimate 8 different cropland ecosystem in Xuzhou mine, combining market value, shadow price and replacement valuation, which including normal, old stable subsidence, new stable subsidence, unstable subsidence, before 3 year-reclamation, 3 ~ 6 year-reclamation, 6 ~ 10 year-reclamation, after 10 year- reclamation. The results indicate that the cropland ecosystem services change over time and present the model U curve, disturbed by coal mining. Different types of cropland ecosystem have the same ecosystem service function structure, and gas regulation, social security and primary production providing account for more than 90% of cropland ecosystem service value. The cropland ecosystem in different parts of the subsidence through showed obvious space variation law. And, as reclamation years increasing, the ecosystem service functions of cropland which have reclaimed increased significantly.