光周期对赤松苗木形态建成和生长的影响

Effect of Photoperiod on Morphogenesis and Growth of Pinus densiflora Sieb seedlings

光周期对赤松苗木的形态建成和生长具有明显的促进作用。光周期可诱导赤松苗木(1-0)产生大量的二针一束针叶和侧枝,其由当年异态发育转化为同态发育,使需两年才能完成的形态建成,在一年内完成;光周期还具有促进赤松苗木生长的作用,其生物量比未进行光周期处理的生物量增加23—83%;赤松苗木所需补光时间在5月初到8月初。

Photoperiod plays a significant role in promoting the morphogenesis and growth of Pinus densiflora Sieb seedlings.It can induce seedlings(1-0) to produce a lot of leaves and lateral branches,by which development of different morphology can be transformed into homomorphic development just in the same year,and thus the morphogenesis of the seedlings which should be finished in two years can be done in only one year.Photoperiod plays an important role as well in promoting the growth of Pinus densiflora Sieb se...