The forcing experiment was performed with Lilium hansonii, native in Ulreung Do Island and Narcissus tazetta, native in Jeju do Island from 1977 to 1979 to see the possibilities of cultivation as a floricultural crop and to see their responses to various environmental factors.
To break the dormancy of L. hansonii bulb, longer than 42 days of 5℃ treatment was required. Once the dormancy is broken, rapid flowering response was noticed, which could be utilized for early forcing. Lilium lancifolium, a native lily, could be induced to flower by both long day and low temperature treatment, although longer than 28 days of cold treatment was required for rapid shoot emergence.
Narcissus tazetta narcissus, like ´King Alfred´ cultivar, did not show any appreciable difference in growth and flowering responses to the growth media and fertilization program. Only the N. tazetta plants grown and harvested at Pyungkwang or Daegu responded to the long day treatment and flowering was accelerated by long day treatment. Since the cold treatment requirement was relatively low in L. tazetta and the long day acceleration of flowering, N. tazetta narcissus could be used as a forced floricultural crops and as well as to study the interaction between cold and photoperiod treatment effects on flowering.
|