Growing situation of afforested trees and damage to lower-story trees caused by felling in multi-storied forest management in Peninsular Malaysia |
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Authors: | Isao Sawaguchi Shunji Shimizu Kouichi Ichihara Katsumi Toyokawa Osamu Ohkawabata |
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Institution: | (1) Forestry and Forest Products Research Institute, 305 Ibaraki, Japan;(2) Japan International Cooperation Agency, Ipoh, Perak, Malaysia;(3) Institute of Agricultural and Forest Engineering, University of Tsukuba, 305 Tsukuba, Japan;(4) Present address: Forestry Agency, 100 Tokyo, Japan |
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Abstract: | The growing condition of afforestation trees and damage to lower-story trees caused by felling and hauling of upper-story
trees in a multi-storied forest in Peninsular Malaysia was surveyed. Seventy months have passed since the planting ofAcacia mangium upperstory trees, which have grown 233 m3/ha in volume. The growth ofShorea leprosula thirty-five months after planting of lower-story trees have reached 5.54 m in height. However, as the ratio of height to
basal diameter exceeds 100:1, trees are tapering to a considerable degree. A backhoe was installed in order to fell the upper-story
trees. From the results of logging, the damage ratio estimation of the lower-story trees was simulated by using the Monte
Carlo method. The damage ratio differed considerably depending on planting patterns, height of upper-story trees and felling
skills. The results of this survey proved that the felling and hauling of upper-story trees would be technically feasible
in the future, except when one row upper-story trees and one row lower-story trees method were employed. |
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Keywords: | damage to lower-story tree logging Malaysia Monte Carlo simulation multi-storied forest |
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