河北省果树发展战略及对策
, and D. Weiss. Effect of Growth Temperature on Aster Flower Development. Hortiscience. 2000,35(1):28-29[3] Byong H.Park, Simon Pearson. Environmental regulation of flowering time in heliotrope (Heliotropium arborescens L. cv. Marine). Scientia Horticulturae. 85(2000):231-241[4] Damann M P,Lyons R E. Juvenility, flowering and the effects of a limited inductive photoperiod
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