林木の肥大成長の微量測定 : キリの連日成長量の測定

概要

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The daily increment of stem diameter were successfully measured on a standing tree, by means of application of a dialgauge graduated with 1/100 mm. scale. The dialgauge was fixed on a wood piece which was set on the stem. (Fig. 1) By this equipment, followings become evident, that in a Paulownia to mentosa, of which yearly radial increment was 25 mm, the growth began at the same time with the opening of the winter buds and ceased at the time when the leaves began to shed. (Table 1) ; The maximum daily increment was measured in July, which was more than 0.4 mm. per day in radius (Table 1). The amount of daily radial increment fluctuated day by day as shown in Fig. 3. The results of every two hours measurement showed that the maximum increment in a day occured in afternoon. (Fig. 4)
一般社団法人日本森林学会の論文
1954-02-25