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首页> 外文期刊>Northern Journal of Applied Forestry >Harvest impacts in uneven-aged and even-aged Missouri ozark forests
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Harvest impacts in uneven-aged and even-aged Missouri ozark forests

机译：在密苏里州不均一甚至均匀的奥扎克森林中收获影响

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摘要

Forest managers are concerned about the potential damage to residual frees and site from cyclic harvest re-entries into the same forest stand. This study summarizes logging and felling damage resulting from the harvesting of silvicultural treatments on a large landscape experiment in southern Missouri that is designed to compare impacts of even-aged. uneven-aged and no management on a wide array of ecosystem components. Although damage levels to bole and crown of leave trees was low for all treatments, the individual tree selection (uneven-aged) treatment did show: (1) higher levels of surface area skidder impact; (2) higher percentage of leave trees with one or more bole wounds: (3) higher number of bole wounds; (4) higher percentage of wounded trees in the dominant and co-dominant crown classes: and (5) the highest percentage of leave trees impacted by logging activity. Preharvest planning that involves the layout and discussion with the skidder operator(s) will reduce the area impacted by skidding to less than 12%. Also, the probability of a bole wound to a residual tree can be reduced to less than 5% if skid trails are kept 30 ft or more from the leave tree.
机译：森林管理者担心循环采伐再进入同一林分会对残留的自由和场地造成潜在的破坏。这项研究总结了密苏里州南部一项大型景观试验中收获的造林处理措施造成的伐木和伐木破坏，旨在比较均匀年龄的影响。年龄不均，对各种生态系统组成部分都没有管理。尽管在所有处理中对落叶树的树冠和树冠的损害程度都很低，但单独选择树木（不均匀年龄）的确显示：（1）表面集材打滑影响较高; （2）带有一个或多个伤口的阔叶树的百分比更高：（3）伤口的数量更高; （4）优势树种和共同优势树种中受伤树木的比例更高：和（5）受伐木活动影响的落叶树比例最高。收割前的计划涉及到集材机操作员的布局和讨论，将使集材滑行影响的面积减少到不到12％。此外，如果将滑道保持在距落叶树30英尺或30英尺以上，则胆汁缠绕到残留树上的可能性可以降低到5％以下。

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