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The Asiatic hybrid lily cultivar Kitakirari can produce multiple flower stalks from the same bulb, and the bulb’s size and bud number affect the cut flower quality of ‘Kitakirari’. For example, it is desirable to have three buds per 12–14-cm bulb, but there are no bulb production techniques that control the bud number. This study examined the relationship between the bulb size and division in the first year of bulb production, the effects of the first-year bulb size and number of daughter bulbs on second-year growth rates, and the division style. In the first year, 46.7% of large bulbs (greater than 7-mm width) bolted. Non-bolted plants produced very few daughter bulbs, but all of the bolted plants formed two or three daughter bulbs from the mother bulb. In the second year, the first-year bulb size did not affect the number of daughter bulbs produced. The greater the number of daughter bulbs produced by first-year bulbs, the greater the number of daughter bulbs produced by second-year bulbs. However, the weight per daughter bulb was lower. These bulbs could not be used for cut flower production. The growth characteristics of first-year bulbs derived from non-bolted plants were examined. One or two daughter bulbs arose from the axillary bud of the last-produced scale or the scale before it, respectively. The average number of daughter bulbs that had formed by early May was 3.2.

engeigaku kenkyuu

Effects of Bulb Size and Scaling on Bolting, Division, and Bulb Weight in the Asiatic Hybrid Lily Cultivar Kitakirari Associated with Multiple Flower Stalk Production