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首页> 外文期刊>Journal of Tropical Forest Science >TREE GIRDLING TREATMENTS FOR TIMBER STAND IMPROVEMENT IN BOLIVIAN TROPICAL FORESTS
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TREE GIRDLING TREATMENTS FOR TIMBER STAND IMPROVEMENT IN BOLIVIAN TROPICAL FORESTS

机译：玻利维亚热带森林树木改良的林木处理

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摘要

The efficacy and costs of three tree girdling treatments to remove non-commercial trees were evaluated in both dry and humid Bolivian tropical forests that were recently harvested. The treatments included chainsaw girdling only and chainsaw girdling immediately followed by application of two different herbicide solutions (glyphosate and 2,4-D) to the girdled surfaces. Two years following the application, girdling + 2,4-D killed more than 75% of the crown on 75% of treated trees, while girdling + glyphosate and girdling only treatments killed 61 and 14% respectively. No significant differences in treatment efficacy were observed between forest types, although there were differences between tree species in response to treatments. Glyphosate killed trees more slowly than 2,4-D. Treatment costs were 0.16 dollar / tree for girdling + 2,4-D, 0.32 dollar/ tree for girdling + glyphosate and 0.09 dollar / tree for girdling only.
机译：在最近收获的干燥和潮湿的玻利维亚热带森林中，对三种树木环剥处理去除非商业树木的功效和成本进行了评估。处理方法包括仅对链锯进行环剥处理，然后立即对链锯进行环剥处理，然后将两种不同的除草剂溶液（草甘膦和2,4-D）施于环剥的表面。施用两年后，环剥+ 2,4-D杀死了75％的被处理树木的75％以上的树冠，而环剥+草甘膦和环剥处理仅分别杀死了61％和14％。在森林类型之间没有观察到治疗效果的显着差异，尽管树木对处理的响应也存在差异。草甘膦杀死树木的速度比2,4-D慢。围栏+ 2,4-D的处理成本为0.16美元/棵，围栏+草甘膦的处理成本为0.32美元/棵，仅围栏为0.09美元/棵。

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