フリ-ジア,ダッチ・アイリス及び黄房スイセンに対する種々のくん煙処理効果の比較

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In Japan, treating corms or bulbs with smoke during storage has long been a common practice to promote breaking dormancy of freesia or flowering of Dutch iris and tazetta narcissus. Different growers have different methods of smoke treatment.In this experiment, corms of freesia and bulbs of Dutch iris and tazetta narcissus were exposed to smoke by various methods and the promotive effects of the smoke treatment on sprouting or flowering were compared. Further, to investigate the gas composition of the smoke, air samples were collected at intervals during the smoke treatments and were analyzed on a gas chromatograph.Freesia corms exposed to smoke sprouted much earlier than non-treated ones. Too short or too long exposure to smoke, however, resulted in a slight decrease in the effect.More than 70% of the smoke-treated Dutch iris bulbs produced flowers but only 3% of non-treated bulbs flowered. The effects on flowering were rather similar among different methods of smoke treatment.Smoked bulbs of tazetta narcissus, which were generally too small to flower, showed a high flowering percentage while non-smoked bulbs showed poor flowering percentage. Similarly, long exposure to smoke showed same results as non-smoked bulbs.Ethane, ethylene, propyrene, and carbon monoxide were detected in the smoke, but their concentrations and length of existence differed greatly among methods of smoke treatment.Ethylene was considered to be the only active component of the smoke because the amount of other gaseous components was too low to exert any promotive effects either on sprouting or flowering. The differences in the promotive effects among different methods of smoke treatment in this experiment may be due to different exposure periods to ethylene.
園藝學會の論文

フリ-ジア,ダッチ・アイリス及び黄房スイセンに対する種々のくん煙処理効果の比較

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