鼎湖山五种植被类型群落生物量及其径级分配特征

Studies on the community biomass and its allocations of five forest types in Dinghushan Nature Reserve

根据鼎湖山自然保护区14次群落样地调查数据和生物量估算方程,研究了5种植被类型的乔木(DBH≥1cm)生物量及其径级分配特征。结果显示:(1)最近一次群落调查中,沟谷雨林、山地常绿阔叶林、南亚热带常绿阔叶林、针阔叶混交林和马尾松林的生物量分别为472.9 t.hm-2,165.1 t.hm-2,290.4 t.hm-2,164.1 t.hm-2和122.5 t.hm-2;(2)生物量径级分配的结果表明,鼎湖山14次植被调查的生物量径级分配总体上存在3种主要的分布类型,分别为递减分布、倒钟型分布和递增分布。鼎湖山生物量径级分配特征规律与其他地区研究结果一致。

The community biomass and its allocations in each of the DBH class in tree layer of five forest types, including Pinus massoniana forest （PM）, Pine and broad-leaved mixed forest （PBM）, Subtropical evergreen broad-leaved forest （SSEB）, Ravine evergreen broad-leaved forest （REB） and Montane evergreen broad-leaved forest （MTEB）, were studied in Dinghushan Nature Reserve （DNR）. Based on biomass regression model, community biomass was estimated by measuring all trees with DBH_〉Icm. The results showed that standing biomass density in REB, MTEB, SSEB, PBM and PM in the latest investigations were 472.9 t·hm^-2, 165.1 t·hm^-2, 290.4 t·hm^-2, 164.1t·hm^-2 and 22.5 t·hm^-2, respectively. The allocation of community biomass in each DBH class in the different forest investigation presented three distribution trends, which were the decreasing distribution, the inverse bell distribution and increasing distribution. The characteristics of biomass allocation in each DBH class in DNR were similar to those in other regions.