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概要

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1. Seven species of Rabdosia were compared by the cultivation on the soil of various degrees of moisture. The growth was measured by the shoot length, the number of the nodes of stem, and the size of leaves for each cultivation on 53-55 days after the germination. 2. The results are summarized in Figs. 1 and 2. For every species except R. japonica, response was similar in appearance. The optimum soil moisture was 60% and 80% of maximum water capacity. When cultivated with 40% and 100% water supply, the growth was distinctly reduced, and on the media with 20% of water supply the plants became stunted or often died. In R. japonica, the range of optimum soil moisture was very broad and 40% to 80%. On the media with 20% and 100% water supply the growth was similarly bad. 3. Compared with the vicarious varieties restricted to the Pacific Ocean side, those of Japan Sea elements, R. shikokiana var. occidentalis and R. umbrosa var. hakusanensis, showed a tendency to have maximum growth on the media somewhat higher in soil moisture (80%).
日本植物分類学会の論文
1974-09-30