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Please use this identifier to cite or link to this item: http://hdl.handle.net/10466/3088

Title: Studies on the Flower Bud Differentiation of Tulip in Japan Part I(Horticulture)
Authors: TSUKAMOTO, Youtaro
Issue Date: 31-Mar-1951
Publisher: Naniwa University
Citation: Scientific report of the Faculty of Agriculture, Naniwa University. 1951, 1, p.79-94
Abstract: 1). Japanese tulips are produced in Niigata, Toyama, Kyoto, Hyogo and Shimane Prefs. on the coast of Japan sea. Bulbs from these districticts are collected at nearly same time and compared the flower bud differentiation. The experiment has been carried for three years, 1948-1950. 2). There are some difference in flower bud differentiation owing to the origins. Bulbs from south west start their differentiation rather early. The flower bud diflerentiation of Japanese tulip generally begin at 20th of June and complete the flower bud late July or early August. These time is earlier than that of Holland. Only.Toyama bulb is late for this time, but its start is also ealier than that of Holland. 3). The later advance of flower bud differentiation after some stages has passed is accelerated by storage in cool tempereture like 10℃. By this treatment the bulbs pass into VII or VIII stage at early July, but if stored in 30℃ differentiations are quite inhibited. The early differentiation-starting Japanese tulip is suitable for forcing if. it is properly stored in cool tempereture. 4). Grading four classes of the size of these bulbs, the speed of differentiotion of each other is compared. At the start, they are same but largest class reaches to the final stage earliest. The smaller, the more later. 5). The water content of bulb of each district are measured. The bulbs produced in coastal sand......Niigata, Kyoto, Shimane......have less water content and Toyama bulb has most, and Hyogo bulb is intermediate. The relation betwean the speed of flower bud differentiation and the water content is recognized. Less the water content is, earlier the differentiation advances.
URI: http://hdl.handle.net/10466/3088
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