Ecological security evaluation of land resources in Guizhou province based on P-S-R model

Based on P-S-R model，this paper evaluated the index system of land ecological security，estimated the index weight by entropy weight method and Delphi method，and according to the comprehensive index of land ecological security level，evaluated the land ecological security of Guizhou province in 2005 to 2012. The results showed that，in 2005-2011，the comprehensive index of land ecological security in Guizhou rose from 0.7149 to 0.7970，the security level was relatively safe；in 2011-2012，the comprehensive index reached 0.7970，the security level desired safer. But the land ecological security of Guizhou still had risks，like obvious contradiction between people and land，frequent natural disasters， per capita income to be improved，low overall level of revenue，low amount of municipal solid waste， high fertilizer use. The result could provide a reference for the sustainable socio-economic development in Guizhou province.