Tending effects of thinning, pruning and soil-exposure of the forest floor in natural secondary oak (Quercus mongolica var. grosseserrata) stands in Hokkaido
1991
Shibuya, M. (Hokkaido Univ., Sapporo (Japan). Faculty of Agriculture) | Masuchi, T.
Natural secondary oak (Quercus mongolica var. grosseserrata) stands are widely distributed and there is numerous standing stock in Hokkaido, yet a tending system for these stands has not been established. Four study plots were established in 1984 in an even-aged secondary oak stand that had regenerated after a fire in eastern Hokkaido, and these stands have been examined since 1984 for density, volume, stand growth rate and other characteristics in order to establish a stand tending system. Some of the plots were thinned and pruned up to 6 m from the forest floor in 1984, and one was raked and cleared the vegetation, mainly sasa (Sasa senanensis), in the same year to expose the mineral soil. In this study, the stand growth rates after thinning, the number of adventitious branches spread out after pruning, and the number of naturally regenerated oak seedlings after treatment of the forest floor were examined first, and a method for stand density control is then discussed based on the results of these investigations
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