基于灰色关联度分析的森林景观类型环境耦合度研究

Coupling Degree of Forest Landscape Type Environment Based on Gray Relational Grade Analysis

以新化县大熊山国有林场的杉木林、松林和阔叶林3种森林景观类型为研究对象,采用灰色关联度法分析研究区3种森林景观类型的平均胸径、平均树高、灌木层多样性和草本层多样性与6个环境因子之间的关联程度,并构建环境耦合度模型,探究林场森林景观类型相互作用下的稳定性。结果表明,1)3种森林景观类型对研究区的环境因子具备较高的适宜性;2)以年均温度和年降水量为代表的气候因子对森林生长发育的关联程度最高,其次是土壤因子,而影响最小的则是地形因子;3)3种森林景观类型中阔叶林和杉木林相互作用的稳定程度最高,其次是阔叶林和松林之间的相互作用,最后则是杉木林和松林。

Taking the three forest landscape types, i. e. Cunninghamia lanceolata, Pinus tabulaeformis and broad-leaved forest in the state-owned forest farmland of Xinhua County as research objects, the correlationship between the tree parameters （the average diameter,tree height,biversity of bush layer,and diversity of herbal layer） of the three forest landscape types and six environmental factors was analyzed by gray correlation method. An environmental coupling model was established to explore the stability of forest landscape type interaction. The results showed that 1） the three forest landscape types involved in the stud- y had high suitability for the environmental factors in the study area. 2） Climatic factors,particularly annu- al average temperature and annual precipitation, exhibited the highest degree of correlationship with the growth and development of forest, followed by soil factor, and terrain factor. 3） The interaction between broad-leaved forest and C. lanceolata forest was the highest among the three forest landscape types, followed by the interaction between broad-leaved forest and pine forest, then the interaction between the fir forest and pine forest.