Land Ecological Security Assessment for Bai Autonomous Prefecture of Dali Based Using PSR Model--with Data in 2009 as Case

摘要: Abstract This paper constructs Bai Autonomous Prefecture of Dali's land ecological security assessment index system based on pressure-state-response model, using entropy method and composite to evaluate Dali Prefecture's security’ is 0.60823 in 2009, which good condition. Although the whole prefecture's condition stays comparative security, we should realize economic disparity status varies from city city. The difficulty exploiting, disasters vulnerable ecosystem are also reality face. So how maintain present trend resources development with rapid economy intensified human activities what government policy makers consider.