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Simulation of harvester productivity in selective and boom-corridor thinning of young forests

机译:模拟选择性和动臂走廊间伐幼林中的收割机生产力

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摘要

Forest management practices may change in the future, due to increases in the extraction of forest fuel in first thinnings. Simulation models can be used to aid in developing new harvesting systems. We used such an approach to assess the productivity of innovative systems in various thinnings of young stands with wide ranges of mean breast height diameter (1.5–15.6 cm), stems per hectare (1000–19,100), and mean height (2.3–14.6 m).udThe results show that selective multiple-tree-handling increases productivity by 20–46% compared to single-tree-handling. If the trees are cut in boom-corridors (10×1 or 2 m strips between strip roads), productivity increases up to 41%, compared to selective multiple-tree-handling. Moreover, if the trees are felled using area-based felling systems, productivity increases by 33–199%, compared to selective multiple-tree-handling. For any given harvesting intensity, productivity increased the most in the densest stands with small trees.udThe results were used to derive time consumption functions. Comparisons with time study results suggest that our simulation model successfully mimicked productivity in real-life forest operations, hence the model and derived functions should be useful for cost calculations and evaluating forest management scenarios in diverse stands.
机译:由于第一次伐木中森林燃料的提取量增加,森林管理实践将来可能会改变。仿真模型可用于帮助开发新的收割系统。我们使用这种方法来评估各种稀疏幼林的创新系统的生产力,这些幼林的平均胸高直径(1.5-15.6 cm),每公顷茎干(1000-19,100)和平均身高(2.3-14.6 m)的范围很广} .ud结果表明,与单树处理相比,选择性多树处理将生产率提高了20–46%。如果在动臂走廊上砍伐树木(条形道路之间的10×1或2 m条带),则与选择性多树处理相比,生产率提高了41%。此外,如果使用基于区域的砍伐系统砍伐树木,则与选择性的多棵树处理相比,生产率提高了33–199%。对于任何给定的采伐强度,在小树木的最茂密林分中,生产力提高最多。 ud结果用于导出时间消耗函数。与时间研究结果的比较表明,我们的模拟模型成功地模拟了现实森林经营中的生产力,因此该模型和派生的功能应可用于成本计算和评估不同林分的森林管理方案。

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