摘要
根据湖南省杉木分布特点,本着"布点均匀、选树适中"的原则,在湖南绥宁、资兴等地选取标准地进行50株杉木取样,测定样木树高、冠幅、胸径等指标,记录样地海拔、小地形、坡向、坡位、坡度等因子.根据外业采集数据,在充分考虑各种立地因子对杉木生物量影响的基础上,以胸径(D)和树高(H)(或树冠长L)为自变量,用8种数学回归模型进行拟合,拟合了8种模型的杉木树干、根、叶、枝干等的生物量,从中筛选出杉木生物量最优模型.
According to distribution characteristics of fir and principle of ＂even point distribution, moderate tree selection＂in Hunan. the author selected 50 fir sample trees to determine their height, crown, diameter respectively, and to record plot elevation, small topography, slope aspect, slope position, slope and other factors as well. According to the data collected in the field, combining with full consideration of the impacts of a variety of site factors on the biomass, the author calculated and adapted with 8 mathematical regression models, with the help of diameter （D）, tree height （H） and crown length （L） as independent variables. As a result, among 8 models for adapting the biomass of Chinese fir＇ s trunk, root, branch and other organs, the optimal biomass model was finally selected from them.
出处
《林业调查规划》
2010年第1期47-49,52,共4页
Forest Inventory and Planning
关键词
杉木
生物量
优化模型
拟合
Chinese fir
biomass
optimization model
adapting
