Compatible diameter and height increment models for lodgepole pine, trembling aspen, and white spruce
Compatible diameter and height increment models for lodgepole pine, trembling aspen, and white spruce
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兼容黑松、颤杨和白云杉的直径和高度增量模型
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发表时间：
2009
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通讯作者：
T. Nunifu
中科院分区：
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作者：
T. Nunifu
本研究拟合了黑松（Pinus contorta Dougl）高度和直径的相容增量模型。练习大声。（var. latifolia Engelm.），颤杨（Populus tremuloides Michx.）和白云杉（Picea glauca (Moench) Voss），利用直径和高度之间的关系。假设树径增量与树高增量成正比，比例常数是竞争和场地生产力的函数。结果表明，拟合统计量与其他研究结果具有可比性，调整后的R2范围为30% ~ 50%。利用独立的永久样地数据对模型进行了验证，结果表明，模型对纯木和混交木的短期预测都是相当无偏的。模型还给出了三种树种纯林分的平均高度和直径生长轨迹，并预测了混合木材（白杨-白云杉混合）的长期体积生长动态。
In this study, compatible height and diameter increment models were fitted for lodgepole pine (Pinus contorta Dougl. ex Loud. var. latifolia Engelm.), trembling aspen (Populus tremuloides Michx.), and white spruce (Picea glauca (Moench) Voss), using the relationship between diameter and height growth. It was assumed that tree diameter increment is directly proportional to height increment, and the proportionality constant is a function of competition and site productivity. The results showed that the fit statistics are comparable with results of other studies, with adjusted R2 ranging from 30% to 50%. A validation test of the models, using independent permanent sample plots data, showed that the short-term predictions of the models for both pure and mixedwood stands are fairly unbiased. The models also gave reasonable average height growth and diameter growth trajectories for pure stands of the three species and also projected long-term mixedwood (aspen – white spruce mixture) volume growth dynamics reaso...