標高と蔬菜類の生態-6-

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On account to harvest cauliflower curds from late spring to midsummer, studies were conducted to know suitable varieties and ages of plnats to be grown in the regions of high altitudes, in 1950 and 1952. Time of flower bud differentiation and its development were extensively examined on the samples collected periodically from different plots.It was found that the early varieties were most desirable in the region. To obtain splended flower curds in the spring crops plants having five or more leaves must be set in the field when minimum tempererature is about 5°C. Flower buds differentiated in the plants when mean temperature was about 10°C, and curds were harvested when mean temperature was 18-20°C. In the region of 1, 200m high above the sea level, it was possible to harvest curds even in midsummer when plants were set out late in the spring.The experimental results show that flower bud differentiation was induced when the plants received periods of cool temperature below 17°C. As for the minimum sizes or ages responsible to cool temperature of Early Snow Ball type, plants should have five or more leaves. It seemed that the buttoning and leafy curds were caused by imperfect induction of flower differentiation.
園芸学会の論文