吉安县松人工林林下灌木生物多样性探讨

Study of Vegetation Biodiversity Under the Artificial Forest of Pine in Ji'an County

选取江西省吉安县人工林中31个样地。通过比较这些样地的林下植被丰富度,多样性指数,以及林分因子的差异,揭示了南方松人工林林下植被的多样性总体状况以及南方松人工林林下植被的多样性。研究结果表明:(1)郁闭度对林下植被生物量影响较大。(2)吉安县人工林各样地多样性总体状况无明显差异,受林分因子影响不显著,可能与当地土壤理化性状有关系。(3)南方松人工林林下植被生物多样性在20年以前与20年以后有个突然增高的现象,上层林木只有在20年以后其林下植被才能够发育得良好。

This article selects in the Jiangxi Province Ji＇an County planted forest 31 types.Through compares these type places under the forest vegetation,the multiple index,as well as the forest divided the factor the difference to promulgate south under the pine artificial numerous vegetation＇s multiple overall condition as well as south under the pine artificial numerous vegetation＇s multiplicity,the biomass and the forest minute factor relational result indicated：（1） Closing the vegetation biomass influence is big to the forest under.（2） The Ji＇an County planted forest all kinds multiple overall condition does not have the obvious difference,is not been remarkable the forest minute factor influence.Possible and the local soil physics and chemistry character has the relations.（3） South under pine artificial numerous vegetation biodiversity before 20 years with 20 years after has the phenomenon which advances suddenly,the upper formation forest only then good which the vegetation only then will be able to grow under 20 years later its forest.