Building a dynamic growth model for trembling aspen in western Canada without age data
Building a dynamic growth model for trembling aspen in western Canada without age data
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在没有年龄数据的情况下，为加拿大西部的颤抖白杨建立动态生长模型
DOI：
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发表时间：
2013
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影响因子：
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通讯作者：
GarcíaOscar
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作者：
GarcíaOscar
针对以颤杨（Populus tremuloides Michx.）为主的同龄间伐或未间伐林分，开发了受生物学启发的整林生长和产量模型。该估算使用了不列颠哥伦比亚省、艾伯塔省、萨斯喀彻温省和马尼托巴省的永久样地数据，并辅以已发布的场地索引和幼林信息。设计了向内生长插补程序，以方便在不测量小树的情况下使用地块测量。两个已发表的站点索引模型通过一个简单的基于年龄的不变方程非常接近。死亡率和基底面积生长的良好参数估计是在不使用年龄观察的情况下获得的，而年龄观察是不可靠或缺失的。四个微分方程描述了顶部高度、每公顷树木数、断面积和场地占用系数的动态。这些变量的当前值用于估计任何直径限制和直径分布参数的总体积和可销售体积。当一个独立的网站来源...
A biologically inspired whole-stand growth and yield model was developed for even-aged thinned or unthinned stands dominated by trembling aspen (Populus tremuloides Michx.). The estimation used permanent sample plot data from British Columbia, Alberta, Saskatchewan, and Manitoba, supplemented by published site index and young stand information. An ingrowth imputation procedure was devised to facilitate the use of plot measurements where small trees are not measured. Two published site index models were closely approximated by a simple age-base invariant equation. Good parameter estimates for mortality and basal area growth were obtained without using age observations, which were unreliable or missing. Four differential equations describe the dynamics of top height, trees per hectare, basal area, and a site occupancy factor. Current values of these variables are used to estimate total and merchantable volumes up to any diameter limit and diameter distribution parameters. When an independent source of site ...