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首页> 外文期刊>Northern Journal of Applied Forestry >A stocking guide for European larch in eastern North America
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A stocking guide for European larch in eastern North America

机译:北美东部欧洲落叶松的库存指南

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摘要

European larch is a fast-growing exotic species that shows promise in alleviating projected fiber supply shortages with numerous plantations being established in the Lake States, the Northeast, and Canada during the last two decades. Prescribing thinning regimes for these plantations would be facilitated through the use of a stocking chart. Few older plantations exist in North America, however, thus fitting equations to construct an A-line that requires data from a large number of stands is not possible. We introduce a new approach to constructing an A-line by using the stand density index that in essence is a modification of the traditional tree area ratio approach. We then invoke the self-thinning rule to produce a reference line for Maximum Average Density and an equation for open-grown trees to produce a reference line for Full Site Occupancy in the construction a stocking chart for field use. We also provide yield estimates by diameter class at maximum and minimum stocking levels.
机译:欧洲落叶松是一种快速增长的外来物种,在过去的二十年中,在湖州,东北部和加拿大建立了许多种植园,显示出有望缓解预计的纤维供应短缺的希望。通过使用放养图表,可以为这些人工林规定间伐制度。但是,北美几乎没有较老的人工林,因此,拟合方程以构建需要大量林分数据的A线是不可能的。我们引入了一种利用林分密度指数构建A线的新方法,该方法本质上是对传统树面积比方法的修改。然后我们调用自稀疏规则来生成最大平均密度的参考线,并使用开放式树木的方程式来生成用于现场使用的库存图表中的全站位占用的参考线。我们还按最大和最小库存水平的直径等级提供产量估算。

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