Studies on the Forcing of Easter lily (Lilium longiflorum Thunb. cv. Georgia)

Easter lily의 촉성재배(促成栽培)에 관(關)한 연구(硏究)

Georgia lily bulbs from experimental plot of the Chungnam National University, weighting 14.1~18.0gm, were used for this study. These bulbs were treated for the natural cooling at cold frame for 90 days and refrigerating at $8^{\circ}C{\pm}1^{\circ}C$ for 50~90 days. And then, these bulbs were planted in the vinyl house. The results of forcing for each treatments were as follow; 1) The natural cooling treatment gave 3 days ealier flowering than the refrigeratings. 2) In the blooming rate, the height of plant, and the size of flower, all refrigerating treatments were bigger than the natural cooling. 3) Among the refrigerating treatments, the best results were attain in the 50 and 60 days treatments than others. 4) Therefore, it is recommended that Georgia lily, as the next crop after Chrysanthemum ect, can be forced effectively by refrigerating treatment at $8^{\circ}C$ for 50~60 days, if these bulbs can be planted until the end of December.