Optimum Planting Density for Japanese Oak (Quercus mongolica var. grosseserrata) Based on Spacing Experiment with Systematic Design :

NDLデジタルコレクション 被引用文献3件 参考文献7件
  • Imada,Morio
    Department of Forestry, Faculty of Agriculture, Kyushu University
  • Kunisaki,Takashi
    Department of Forestry, Faculty of Agriculture, Kyushu University:(Present)Department of Agronomy and Forestry, Faculty of Agriculture, Iwate University
  • Mizoue,Nobuya
    Department of Forestry, Faculty of Agriculture, Kyushu University
  • Teraoka,Yukio
    The University Forest in Miyazaki, Faculty of Agriculture, Kyushu University:(Present)Department of Forestry, Faculty of Agriculture, Kagoshima University

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説明

A spacing experiment for Japanese oak (Quercus mongolica var. grosseserrata) wlth Nelder's design have been studied at the Kyushu University Forest in Hokkaido, since 1975. The oak seedlings were planted according to systematic spacings which were 20 levels varying gradually from 40,816 to 1,086 seedlings per hectare with concentric circular arcs (22 in number) and spokes (41 in number). In 1992 when the planted oak seedlings were 18-year-old. DBH, crown diameter, total height and clear length of the survival trees were measured. Based on the results obtained from analyzing the relationships between planting density and the mean values of each block, the optimum planting density should be 7,241 seedlings per hectare.

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