浙江省重点公益林生物量模型研究

Study on Biomass Model of Key Ecological Forest in Zhejiang Province

根据浙江省重点公益林的森林群落和树种分布特点,在全省200多万hm2重点公益林范围内共设置854个典型样地,样地根据气候区、立地条件、林分类型、群落结构、林龄等因素综合布设,实测样株生物量,利用树木各分量生物量之间存在相对生长关系,乔木以树高、胸径、枝下高为变量构建各分量生物量模型通式,下木层以地径和株数构建单位面积生物量,草本层则以盖度和高度构建生物量模型,共构建了松类、杉类、硬阔(Ⅰ、Ⅱ)、软阔、毛竹、杂竹、灌木(下层木)、草本9组主要树种(组)生物量模型,模型测算因子简单易得,经评价和检验,各模型均具有较好的拟合精度和预估水平。

Based on properties of forest community and species distribution of key ecological forest in Zhejiang province, 854 typical sample plots were set up according to the climatic region, site conditions, stand type, community structure, age composition of stand and standard trees were surveyed for biomass in the 2 millions hectares key ecological forest. Biomass models for arbors of each indicator were established taking tree height, DBH and clear bole height as variable, for shrubs taking underground diameter and tree number as variable, and for herbs taking coverage and height. 9 biomass models for pine, Chinese fir, soRwood, hardwood（I and II）, Phyllostachys heterocycla var. pubescens, common bamboo, shrub and herbs were established, with advantages of easy obtain of indicators and good fitting precision and estimation level.