【摘要】 以华北土石山区51块油松(Pinus tabulaeformis)林标准地为研究对象,运用主成分分析法选取主成分指标,运用聚类分析法对标准地进行分类,通过构造综合评价指数对其生态系统健康状况进行评价。结果表明:所选样本可分别被判定为Ⅰ级优质健康、Ⅱ级良好健康、Ⅲ级一般健康、Ⅳ级亚健康和Ⅴ级不健康5级,Ⅰ级优质健康的油松林标准地共有6块,其中5块为很少有人为干扰的天然林,1块为人工林,其他健康级别全部为人工油松林,依次为12块1、1块、18块和4块;评价方法能够比较客观地反应所调查油松林的健康状况,具有一定的科学性和可操作性,可达到定量化评估华北土石山区油松林生态系统健康的目的,对该区森林生态系统健康经营具有一定的参考价值。更多还原

【Abstract】 Based on the Principal Component Analysis,the 51 Pinus tabulaeformis sample plots were classified with Clustering Analysis,and the 51 sample plots’ health status were assessed with the constructed integrated assessing model.The results indicate that the 51 sample plots could be clustered into 5 levels.Among all the Pinus tabulaeformis sample plots,6 are the excellent health(Ⅰ level),12 are the good health(Ⅱ level),11 are the general health(Ⅲ level),18 are the sub-health(Ⅳ level) and 4 are the ill health(Ⅴ level).Of the 6 excellent health sampling plots,5 are natural forest,only 1 is planted forest,all other healthy sampling plots are planted forest.The assessing method can reflect the health status of the sample plots objectively and operability,and it offers a certain reference to the forest ecosystem health management.更多还原