吉林省通榆县近20年农业可持续发展的生态安全评价  

Evaluation of Ecological Security of Agricultural Sustainable Development in Tongyu County during 20 Years

作　　者：汤洁[1] 李海毅[1] 斯蔼[1] 

机构地区：[1]吉林大学环境与资源学院,吉林长春130026

出　　处：《农业现代化研究》2007年第1期75-78,共4页Research of Agricultural Modernization

基　　金：国家自然科学基金:"松嫩平原西南部生态环境数字信息系统的构建及应用"(编号:40572170)

摘　　要：建立了通榆县农业可持续发展的生态安全评价指标体系,采用均方差法确定了评价指标的权重,对研究区1985、1990、1995、1998、2001、2004年6个时段的农业生态安全进行了评价。从评价结果可以看出,近20年,通榆县农业生态安全呈现下降态势,安全等级处于III-V级之间,安全程度从敏感态下降到风险态。1998年是研究区农业生态安全变化的转折点,从1998年起,农业生态安全有所回升。The indicator system of ecological security of agricultural sustainable development in the Tongyu County was established,the weight of the indicator was determined by the method of mean square deviation, ecological security of agricultural development of 1985,1990,1995,1998,2001 and 2004 were evaluated by the model of ecological security. The result showed that the ecological security of agriculture had being decreased during the past 20 years,the grading of ecological security of Tongyu County of above 6 years were between Ⅲ and Ⅴ,and the degree of security was dropped from sensitive state to risk state. 1998 was the turning point and the ecological security of agriculture had being recovered from 1998.

关 键 词：生态安全 农业可持续发展 协方差法 通榆县 

分 类 号：X826[环境科学与工程—环境工程]