亚热带4种森林生物量估算转换参数的研究  

Conversion parameters determination for stand biomass estimation of four subtropical forest types based on national forest inventory system

作　　者：侯燕南[1,2] 吴惠俐[1] 项文化[1] 邓湘雯[1] 

机构地区：[1]中南林业科技大学生命科学与技术学院,湖南长沙410004 [2]湖南省林业厅造林处,湖南长沙410004

出　　处：《中南林业科技大学学报》2016年第8期57-65,共9页Journal of Central South University of Forestry & Technology

基　　金：国家林业公益性行业专项项目(201304317)

摘　　要：对我国亚热带森林资源调查中典型的4种森林类型(杉木林、马尾松林、落叶阔叶林和常绿阔叶林)的林分生物量数据进行整合分析,计算4种森林类型从林分蓄积量估算林分生物量的主要转换参数平均值,并分析影响转换参数的林分因子。结果表明:(1)杉木林、马尾松林、落叶阔叶林和常绿阔叶林4种森林类型中优势树种的木材基本密度平均值分别为0.313 3、0.412 5、0.502 1和0.527 4,木材基本密度因树种种源、种系、立地条件、林龄、林分密度等因子的不同而不同。(2)杉木林、马尾松林、落叶阔叶林和常绿阔叶林生物量扩展因子的平均值分别为1.308 9、1.265 4、1.423 3和1.391 3,根冠比的平均值分别为0.169 4、0.177 2、0.239 1和0.263 5。(3)4种森林类型的生物量扩展因子和根冠比随林龄、平均胸径和平均树高的增加而减少,随林分密度的增加而增加。4种森林类型的生物量估算转换参数间存在明显的差异,因此,在估算森林生物量时应按具体的森林类型进行估算,同时还应考虑林龄、林分密度、平均胸径和平均树高等林分因子的影响。Synthesis of stand biomass data of 4 typical forests （Cunninghamia lanceonata forest, Pinus massoniana forest, deciduous broadleaved forest and evergreen broadleaved forest） from National Forest Inventory in subtropical area, we determine conversion parameters for stand biomass estimation based on stand volumes and analyzed how stand characteristics affect the parameters. The results showed that： （1） The mean values of wood basic density （Wd） of dominant trees of Cunninghamia lanceonata forest, Pinus massoniana forest, deciduous broadleaved forest and evergreen broadleaved forest were 0.313 3, 0.412 5, 0.502 1 and 0.527 4, respectively. The Wd was affected by tree provenance, species, site conditions, stand age （A）, stand density（D） and other factors. （2） The mean values of biomass expansion factor （Bef） of Cunninghamia lanceonata forest, Pinus massoniana forest, deciduous broadleaved forest and evergreen broadleaved forest were 1.308 9, 1.265 4, 1.423 3 and 1.308 9, respectively, and the mean values of root： shoot ratio （R） were 0.169 4, 0.177 2, 0.239 1 and 0.263 5, respectively. （3） The Befand R values of these four forests were increased with the increases of A, average diameter at breast height （Dbh） and average tree height （H）, and reduced with the increases of D, excepted the R values of the Pinus massoniana forest had no obvious change with A. Due to obvious differences between these four forests, so we should select conversion parameters according to specific forest when estimating forest biomass.

关 键 词：杉木林 马尾松林 落叶阔叶林 常绿阔叶林 木材密度 生物量扩展因子 林分因子 

分 类 号：S785[农业科学—林学]