吉林西部典型农牧交错区生态质量退化因子主成分研究

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放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.

Principal component study on the driving factors of the ecological quality degrading of the typical farming-pastoral ecotone in west Jinlin province

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.