浙江省仙居县公益林生物量动态分析

The biomass dynamic analysis of public walfare forest in Xianju county of Zhejiang province

通过两阶抽样法对浙江省仙居县4.87万hm2公益林区域内,111个生态公益林样地的常绿阔叶林、针阔混交林、松木林和杉木林、毛竹林、灌木林等6种主要林型的生物量动态变化及其分布进行了调查和分析。结果表明:仙居县杉木林群落生物量最高,平均为99.75 t/hm2;针阔混交林次之,群落生物量平均为96.13 t/hm2;灌木林群落生物量最低,平均为38.80 t/hm2。如果采用本地的参数和按类型进行详尽的调查和统计,得到的生物量和生产力估算将更可靠。

Based on the latest ＂Specifications for assessment of forest ecosystem services in China＂,we have used two-stage sampling to monitor biomass dynamic of 111 permanent sample plots in subcompartment with 48.7 thousand hectares in Xianju county Zhejiang province.The results showed that Chinese fir forest had the highest community biomass（99.75 t/hm2）,which was higher than that of coniferous and broad-leaved mixed forest（96.13 t/hm2）.Shrub forest had the lowest community biomass（38.80 t/hm2） in Xianju county.Considering the precision of biomass estimation at local level,we proposed that it was more reliable to evaluate their benefit by investigating and calculating the forest biomass based on local forest type and parameters first,then the underlying biomass data was provided for calculation and correction assessment.