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개화유도에 (開花誘導) 의한 임목육종싸이클의 단축 Ⅰ. 자작나무와 은자작나무 유묘에 있어서 재배환경 조절에 의한 개화유도
류수환(Soo Hwan Ryu),여영동(Yong Dong Ryo),최문규(Mun Kyu Choi),최원규(Won Kyu Choi),심재우(Jae Woo Shim),정극수(Keuk Soo Chung),정민섭(Min Sup Chung) 한국산림과학회 1995 한국산림과학회지 Vol.84 No.4
Seedlings and grafts of Betula pendula and Betula platyphylla var. japonica were grown under partially controlled environments in a greenhouse and in a plastic-greenhouse installed inside a laboratory. Plant growth conditions such as photoperiod, temperature, nutrient supply were partially controlled to enhance the vegetative and reproductive growth of the birch seedlings and grafts. By the treatments twenty and seventy one percents of the seedlings, respectively, for the Betula pendula and Betula platyphylla var. japonica developed visible floral organs between 250 to 508 days after seeding. By the same treatments eighty and fifty three percents of the grafts, respectively, for Betula pendula and Betula platyphylla var. japonica developed visible male catkins between 51 to 497 days and female catkins between 365 to 396 days after grafting. Breeding cycle of birch species can be reduced to a great extent by the induction of precocious flowering at early stages of seedling and graft development.