摘要
以吉林西部为例,借助ARC/INFO建立评价数据平台,运用主成分分析方法确定出典型农牧交错区草地生态系统退化的主要驱动因子,并对吉林西部九县市生态环境质量进行评价,得出优劣次序及对应的生态退化驱动因子。研究结果表明,吉林西部典型农牧交错区草地生态退化的主要驱动因子为:人口及畜牧压力、干燥度、土壤盐碱化程度。吉林西部各县市生态质量从优至劣依次为:扶余、前郭、长岭、洮南、通榆、乾安、大安、白城、镇赉。
On the basis of the ARC/INFO data-evaluating platform,the component analysis method is applied to extract the main driving-factors that leading to the ecological quality degradation in west Jilin province,then the order of the ecological quality between the nine counties and cities in west Jilin province and the corresponding driving factors are determined though evaluating the ecological quality status of this area.Result s show that the main driving-factors that leading to the ecological quality degradation in west Jilin province are the pressure of population and grazing,drought index,the degree of the Soil Salinization.The order of the ecological quality between the nine counties and cities in west Jilin province are as follows： Fuyu county,Qianguo county,Chanling county,Taonan city,Tongyu County,Qianan County,Da＇an city,Baicheng city,Zhenlai County.
出处
《干旱地区农业研究》
CSCD
北大核心
2008年第5期224-227,233,共5页
Agricultural Research in the Arid Areas
基金
国家自然科学基金项目“草地放牧系统的优化放牧理论(OFT)研究”(30070545)
关键词
主成分分析
GIS
生态质量评价
农牧交错区
驱动因子
Principal component analysis method
GIS
ecological quality evaluation
the farming-pastoral ecotone
driving factors
