Intraspecific and Interspecific Competition of Quercus Liaotungensis Community in Songshan Nature Reserve

In order to study the intraspecific and interspecific relationship in the Quercus liaotungensis community,the intraspecific and interspecific competition intensity was investigated by using Hegyi competition index model for individual tree(IC) in Songshan Nature Reserve.Results showed that the intraspecific and interspecific competition intensity in the community gradually decreased with the increase in forest DBH level.The trees,in terms of the intraspecific and interspecific competition's intensity,were in the order of Quercus liaotungensis Fraxinus chinensis Armeniaca sibirica Carpinus turczaninowii.According to the sample number statistics,the power function of IC=AD-B for the competition intensity and the objective tree DBH distribution was most remarkable.The intraspecific and interspecific competition intensity in Quercus liaotungensis community was forecasted.When the diameter of Quercus liaotungensis tree was above 25 cm,the change in competition intensity was very small.Therefore,suitable artificial measures should be taken to promote plant growth and enhance ecosystem stability.