摘要
从森林生产力要素、森林生态要素、环境要素与胁迫要素4个角度建立指标体系,采用主成分分析方法,对河北省承德县8种不同林型、林龄的林地进行健康状况综合评价。用综合健康指数反映其健康状况。评价结果较客观合理,因此认为主成分分析法在森林生态系统健康评价中的选择指标和确定指标权重方面具备优势,能有效消除评价指标之间的相关影响,并能避免主观赋权法因主观随意性而造成的误差。
In this study,8 types of forest ecosystem in Chengde county are evaluated by using the method of principal component analysis. And the evaluation system is composed of four aspects including forest productivity,forest ecology,forest environment and intimidation. The integrated index is used to reflect the health condition. As the results are impersonal,it is considered that the principal component analysis method is superior in selecting indicators and confirming indicators,it can eliminate the influence between the indicators,and avoids the impact of subject factor.
出处
《中国农学通报》
CSCD
2008年第6期400-403,共4页
Chinese Agricultural Science Bulletin
关键词
森林生态系统
健康评价
主成分分析
forest ecosystem,health evaluation,principal component analysis
