【摘要】 根据野外调查数据,采用Hegyi单木竞争指数模型,定量地研究了桂林岩溶石山建群种青冈栎的种内、种间竞争关系。结果表明,青冈栎所受到的竞争强度随着林木径级的增大而逐渐减小,种内竞争明显较种间竞争剧烈。青冈栎种内和种间竞争强度的顺序为:青冈栎>石山樟>亮叶槭>圆叶乌桕>光叶海桐>翅荚香槐>梧桐>黄连木>铁屎米>粗康柴。整个林分以及青冈栎种内对对象木的的竞争强度与对象木胸径之间的关系近似服从幂函数关系,而伴生树种对对象木的竞争强度与对象木胸径之间的关系近似服从对数函数关系,对象木胸径与竞争强度间呈显著负相关关系。更多还原

【Abstract】 According to the field investigation data,the intraspecific and interspecific competition intensity of Cyclobalanopsis glauca in Karst hills in Guilin was quantitatively analyzed by using Hegyi single-tree competition index model.The results showed that the competition intensity in C.glauca decreased gradually with the increase tree diameter class and the intraspecific competition in C.glauca was more intensive than the interspecific competition.The degressive order of the intraspecific and interspecific competition intensity was as follows: intraspecific> Cinnamomum saxatile> Acer lucidum > Sapium rotundifolium > Pittosporum glabratum > Cladrastis platycarpa > Firmiana simplex > Pistacia chinensis > Canthium dicoccum> Mallotus philippinensis.The relationships of the diameter at breast height(DBH) of objective trees and the competition intensity between competitive trees and objective trees in the whole forest and C.glauca population nearly conformed to power function,while that between other competitive trees and the objective C.glauca trees conformed to logarithm function.The DBH of the objective trees was significantly negative correlation with competition intensity.更多还原