闽北米槠天然次生林乔木层群落竞争关系分析

在顺昌县典型米槠天然次生林林分中进行树种调查,在计算群落乔木层优势树种重要值的基础上,运用V-Hegyi竞争指数分析米槠天然次生林群落优势种群竞争关系,从而为闽北米槠天然林的更新与保护提供理论参考.结果表明:在米槠天然次生林中,米槠占据优势主导地位.群落中主要树种米槠、木荷、榉木表现出强烈的种内与种间竞争关系,而其他如拟赤杨、青冈栎、槠木、红楠、黄瑞木、黄楠等次要树种的种内与种间竞争关系均较微弱.

Analysis of Community Competition for Tree Layer of Castanopsis carlesii Natural Secondary Forests in Northern Fujian

Through the tree species investigation in the typical Castanopsis carlesii natural secondary forests in Shunchang County,the important value of the dominant tree species in the tree layer were calculated. Then the competition relationships among the dominant tree specie communities were analyzed by using V-Hegyi competition index to provide theoretical reference for the regeneration and protection of Castanopsis carlesii natural forests in northern Fujian. The results showed that in Castanopsis carlesii natural secondary forests, Castanopsis carlesii was still dominant. The intraspecific and interspecific competitions were sharp among principal species which contained Castanopsis carlesii, Schima superb and Zelkova schneideriana. While the intraspecific and interspecific competitions in minor species among Alniphyllum fortunei, Cyclobalanopsis glauca, Castanopsis sclerophylla,Machilus thunbergii,Adinandra millettii etc. were weak.