杉木、厚朴混交林邻体干扰效应研究

Studies on neighborhood effects in the mixed forest of cunninghamia lanceolata and magnolia officinalis

以杉木—厚朴人工混交林为研究对象,研究杉木和厚朴邻体干扰效应。结果表明,杉木和厚朴混交林中杉木和厚朴个体间表现强烈的竞争关系,其中以厚朴为基株的总竞争大于以杉木为基株的总竞争,二者又与杉木间的竞争较大,表明该人工群落演替的动力是厚朴和杉木各个体对资源竞争所引起的他疏作用,以及杉木种内竞争引起的自疏作用。进一步分析个体生长速度与邻体干扰效应之间的相互关系,表明杉木和厚朴生长速度和邻体干扰指数之间有显著的线性关系。

This paper deals with the relationship between the individual growth rate and the neighborhood interference effect in Cunninghamia lanceolata and Magnolia officinalis mixed forest.The result shows that there is inter-specific and intra-specific competition in Cunninghamia lanceolata and Magnolia officinalis mixed forest.When Magnolia officinalis is basic tree,competition is more intensively than that when Cunninghamia lanceolata is basic tree.They compete with Cunninghamia lanceolata more intensively than with Magnolia officinalis.So it shows that the main driving force of succession for the mixed forest is the competition between Magnolia officinalis and Cunninghamia lanceolata,then the interspecies competition of Cunninghamia lanceolata.Interference index model is used to make regression analysis between the growth rate and the neighborhood interference index.It demonstrates that there is a significant linear correlation between the growth rate of Cunninghamia lanceolata and Magnolia officinalis and neighborhood interference index.