Growth models for Sitka spruce in Ireland.
Growth models for Sitka spruce in Ireland.
复制标题
爱尔兰西特卡云杉的生长模型。
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
T. Lynch
中科院分区：
文献类型：
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作者：
L. Broad;T. Lynch
特设技术被用来适应锡特卡云杉在爱尔兰的抽样偏差的存在下，林分水平的增长模型。面板数据，来源于一组重复测量实验设计的聚合，承认抽样偏差时，被认为是一个数据集的产量建模的目的。在可能的情况下，通过使用加权技术，对抽样不平衡现象采取了补救行动。处理数据遗漏的进一步行动涉及使用数据替代。所用的增长成分模型是由加西亚制定的多变量Bertalanffy-Richards模型。该模型允许聚集的状态空间表示的立场发展制定和拟合。对于林分模拟，生长方程增加了接受状态变量作为参数的函数，并计算任何间伐、林分蓄积量和蓄积量调整期间的断面积减少。
Ad hoc techniques were used to fit stand-level growth models for Sitka spruce in Ireland in the presence of sampling biases. Panel data, sourced by aggregation over a set of repeated measures experimental designs, admitted sampling biases when considered as a data set for yield modelling purposes. Remedial action towards sampling imbalances was taken, whenever possible, through the use of weighting techniques. Further action to address data omissions involved using data substitution. The growth component model used was the multivariate Bertalanffy-Richards model formulated by Garcia. The model allows aggregated state-space representations of stand development to be formulated and fitted. For stand simulations, growth equations were augmented with functions accepting state variables as arguments and compute basal area reduction during any thinning, stand volume and volume assortments.