蘿蔔種子春化處理對開花之影響

Flowering in Radishes as Influenced by Seed Vernalization

臺灣之六個蘿蔔品種與日本之美濃早生、二十日大根行種子春化處理，比較品種間對春化處理之感應。處理溫度5℃與10℃，時間分三星期、二星期、一星期三種；試驗分科播與春播兩重複，行砂與（石至）石混全之無土栽培管理法。各品種對溫度感應次序為：冬瓜白（符號略）馬耳代＞桃園矸仔（符號略）大白代＞五峰早生＞大梅花（符號略）美濃早生＞二十日大根。冬瓜白、馬耳代、桃園矸仔、大白代在5℃處理兩星期已完全完成春化感應，五峰早生、大梅花、美濃早生、二十日大根，則需5℃三星期才完全完成春化感應，抽苔、出蕾、開花才會整齊。在本試驗裡，以5℃處理三星期，春化效果最好，出蕾開花最快。

1007 During 1969-1970, an experiment was conducted for examining the response of 6 varieties of Taiwan radish and 2 varieties of Japanese radish (Minowase and 20-day radish) to seed vernalization. The sensitivity to low temperature on percentage or days of showing visible flower buds and flowering in 8 varieties were in the following order: Dong gau bai(The symbol is abbreviated)Ma eel yu＞Taur yaun gan tzy(The symbol is abbreviated)Dah bai yu＞Wu feng tzao sheng＞Dah mei hua(The symbol is abbreviated)Minowase＞20-day radish. Varieties of Dong gau bai, Ma eel yu, Taur yaun gan tzy. Dah yu exposed to 5℃ for 2 weeks were completely vernalized. However, other varieties such as: Wu feng tzao sheng, Dah mei hua, Minowase, 20-day radish exposed for 3 weeks were completely vernalized. The longer the period of 5℃ treatment, the earlier and more uniform the bolting, showing visible flower buds and flowering. In this experiment the most efficient treatment for seed vernalization of radish varieties was 5℃ for 3 weeks.