福建将乐林场栲类次生林干扰评价研究

Disturbance Assessment on the Castanopsis Secondary Forest in Jiangle Forest Farm

以福建将乐林场栲类次生林为研究对象,构建栲类次生林干扰评价指标体系,采用熵权法修正层次分析法确定各指标权重,对该林场21块栲类次生林标准地进行干扰评价,并利用软件SPSS18.0分析干扰度与各指标之间的相关性,构建二者之间的耦合关系模型。结果显示:将乐林场栲类次生林主要处于轻度干扰和几无干扰状态;与干扰度相关性较大的指标是人为干扰指标和系统活力指标;对干扰度影响从大到小的主导因子依次是人为干扰(X1)、生物多样性(X2)、自然干扰(X3)、生物量(X4)、层次结构(X5)和其他因素(X6),栲类次生林干扰度与各评价指标之间的耦合关系模型为:SL=0.36 X1+0.18 X2+0.13 X3+0.1 X4+0.09 X5+0.14 X6。本研究为科学合理地经营栲类次生林提供了理论依据。

Twenty one plots of Castanopsis secondary forests occurring in Jiangle Forest Farm,Fujian Province were selected as the research objects to examine the degrees of the disturbance.Related assessment index system was established.Correlations between index and degree of disturbance were analyzed by SPSS18.0software,and coupling correlation model was constructed.The results indicated that the Castanopsis secondary forests were almost under light and little disturbance.Human disturbance index and ecosystem vitality index were highly correlated to disturbance degree.The leading factors which influenced the disturbance degree were in a decreasing order of human destruction(X1),biodiversity(X2),natural destruction(X3),biomass(X4),hierachical structure(X5),and other factors(X6).The coupling correlation model between disturbance degree and evaluation index was SL=0.36 X1+0.18 X2+0.13 X3+0.1 X4+0.09 X5+0.14 X6.The results would provide theoretical basis for managing Castanopsis secondary forest scientifically and reasonably.