玉葱の抽苔に関する研究(第2報) : 花芽分化温度について
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概要
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1. The author presumed the temperature for flower bud formation, comparing the leaf-stage for bolting of the onions sown in autumn, with the temperature of spring. 2. The onions which reached to the leaf-stage for bulb-division, were able to form flower buds only with low temperatur: that is below 5°C on the mean temperature, below 10°C on the max-imum, and below 0°C on the minimum. 3. The onions which reached to the leaf-stage for bulb-division, were retarded growth and ob-structed bulb-division for a time by replanting. In this case, the flower bud formation occurred at 10°C on the mean temperature, 13°C on the maximum and 2_??_3°C on the minimum. 4. It seemed that the period of low temperature which the onions needed for flower bud formation was about 4_??_5 days.
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