浙江天台山甜槠种内与种间竞争研究

Intraspecific and interspecific competition in Castanopsis eyrei in Tiantai Mountain of Zhejiang Province

采用Hegyi的单木竞争指数模型对天台山的甜槠种内、种间的竞争强度进行定量分析。结果表明 ,甜槠种内竞争强度随着林木径级的增大而逐渐减小 ,种内竞争较之与其伴生树种间的竞争剧烈。甜槠种内、种间竞争强度的顺序为 :甜楮 >木荷 >马尾松 >尾叶冬青 >虎皮楠 >短柄木包 >珍珠栗。竞争木对对象木的竞争强度与对象木的个体大小服从幂函数关系 ,竞争强度和对象木个体的大小呈极显著的负相关关系。当甜槠胸径达到 30cm后 ,竞争强度变化不明显 ,说明此时该生态系统已基本达到稳定状态。

The intraspecific and interspecific competition intensity in Castanopsis eyrei in Tiantai Mountain of Zhejiang Province were quantitatively analyzed using Hegyi single tree competition index model. The results showed that the intraspecific competition intensity in C. eyrei decreased gradually with the increase of forest tree diameter class and the interspecific competition in C. eyrei were more intensive than those in associated tree species. The order of the intraspecific and interspecific competition intensity in C. eyrei was descending: C. eyrei, Schima superba, Pinus massoniana, Ilex wilsonii, Daphniphyllum oldhamii, Quercus glandulifera var. brevipetiolata and Castanea henryi. The relationship of the competition intensity between the competitive tree and the objective tree and the individual size of objective tree obeyed power function rule and there was significanty negative correlation between the competition intensity and the individual size of objective tree. When the diameter at breast height of C. eyrei reached 30 cm, the competition intensity inconspicuously changed and suggested that this ecological system had been primarily in stable situation.