长白落叶松相容性生物量模型构建方法研究
首发时间:2010-03-08
摘要:建模是生物量估测的主要方法,本文通过生物量独立估测模型,以树干生物量为基础联合估计建立了长白落叶松单株木的相容性生物量模型。首先基于黑龙江伊春地区长白落叶松标准地的调查和准确测定平均木的生物量,探讨了长白落叶松胸径、树高等林木特征因子和各维量生物量之间的关系;采用变量逐步筛选法,构建并比较了几种常用的树干、地上部分、整株林木等各部分独立的生物量估测模型优劣。之后,以树干生物量作为控制量,通过独立的生物量模型进行联立求解得到长白落叶松单株、地上、树干、树冠、树枝和树叶生物量的相容性模型。同时将样本分为3组,分别总体及组别利用5个指标来综合评价模型。本文开展的生物估测模式的研究可为深入研究长白落叶松提供相关参数。在一定精度保证下,可以用于该地区长白落叶松生产经营性的生物量估测。
关键词: 长白落叶松 生物量模型 相容性 联合估计 模型检验
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A Study on Establish of Compatible Biomass Model for Larix olgensis
Abstract:Establishing Biomass models is a major way to biomass estimation.Authors established several commonly seen individual biomass estimation models for each components of Larix olgensis firstly.Then,we took trunk as a basis component and adopted three steps joint estimate to establish a series of compatible model.In this regard,first,in accordance with the survey of standard Larix olgensis plots in Yichun district of Heilongjiang,to built correlation matrix between single or multiple factors of tree and biomass of each component,and used progressive variable selection method to establish and evaluate individual models on total tree biomass,aboveground biomass,trunk biomass,root biomass,crown biomass,branch biomass and foliage biomass of Larix olgensis.Second,adopting three steps joint estimate method and solving the simultaneous and optimum models from these individual models which been selected,to get a series of compatible model for each component.At meantime,the paper used five indices to evaluate and analyze models in total and three different groups which were divided by DBH.The estimation methodologies of the model parameters and useful data are also provided in this research for other in-depth study.Also, the models can be used in biomass evaluation of Larix olgensis within certain precision.
Keywords: Larix olgensis Biomass model Compatible Joint estimate Evaluate
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