杉木第3代种子园无性系花期观察与分析

Study of Clones′Flowering and Needle Colour in Thre e Generations of Seed Orchard for Cunninghamia lanceolata

杉木种子园无性系雌雄花量和盛花期对种子园种子产量和品质有重要影响。于2020年,对福建省将乐国有林场第三期杉木第3代种子园中70个无性系的花量、盛花期进行调查分析。结果表明,无性系自身以及无性系间雌雄球花的盛花期同步性存在明显差异,且整体上雌球花开花时间早于雄球花,较雄球花提前2 d完全进入盛花期。雌雄球花在树冠上分布存在明显的层次性,下层雄花多,上层雌球花多,这种分布机制在一定程度上抑制了杉木自交。研究结果可为种子园的管理与高世代杉木种子园的建设提供参考。

The number of female and male strobilus and flowering in full bloom of Cunninghamia lanceolata seed orchard have an important effect for yield and quality of the seed orchard Meanwhile.In 2020,the flower mass,flowering in full bloom of 70 clones of 3rd generations of Cunninghamia lanceolata in the phase III of seed orchard in Jiangle Fujian Province have been investigated.Jiangle Fujian Province have been investigated.The results show that,the synchronicity of the flowering period of male and female flowers within and between clones was different,the flowering time of female flowers is earlier than that of male flowers,and they fully enter the flowering period 2 days earlier than male flowers.There is a clear hierarchical distribution of male and female cones on the tree crown,with more male flowers in the lower layer and more female flowers in the upper layer.This distribution mechanism has a certain impact on self pollination of Chinese fir.The results provide theoretical support for management and development of seed orchard,and lay the foundation for the research of the seed orchard.