基于PCA的福建省顺昌县森林健康评价

以福建省顺昌县的杉木纯林、毛竹纯林、杉木马尾松混交林、杉木阔叶混交林、阔叶林等5块样地为对象，从结构性、功能性和抗干扰性等3个方面出发，筛选出15个指标，并利用主成分分析（PCA）实现了研究区森林健康评价。结果显示：福建省顺昌县杉木纯林、毛竹纯林、杉木马尾松混交林、杉木阔叶混交林、阔叶林等5块样地的森林健康综合指数值依次为-0．27、-0．25、0．35、0．53和-0．01，从优到次的排名为：杉木阔叶混交林、杉木马尾松混交林、阔叶林、毛竹纯林、杉木纯林。

Forest Health Evaluation for Shunchang County in Fujian Based on PCA

As a structure, forest should have the state and capabilities to maintain its own existence and update, to play an essential ecological service functions. The paper took 5 plots of Chinese fir pure stand, mao bamboo pure stand, Chinese fir and masson pine mixed stand, Chinese fir and broad- leaves mixed stand, broadleaves stand in Shunchang County in Fujian as objects, considering the con- stitutive property, functionality and anti - interference property, screened out 15 indicators, and then realized the forest health evaluation for study area based on Principal Component Analysis. The results showed that the Forest Health Comprehensive Index Values （FHCIV） of these 5 plots of Chinese fir pure stand, mao bamboo pure stand, Chinese fir and masson pine mixed stand, Chinese fir and broad- leaves mixed stand, broadleaves stand were - 0.27, - 0.25, 0.35, 0.53 and - 0.11 successively, ranking from excellent to inferior as Chinese fir and broadleaves mixed stand, Chinese fir and mason pine mixed stand, broadleaves stand, mao bamboo pure stand and Chinese fir pure stand.