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马尾松开花结实习性及球果丰歉规律,是良种生产的主要研究内容之一。例如幼林期初始开花结果年龄、雌雄球花的比例;成林期的结实数量、年度之间的差异以及球果在树冠层的分布情况;立地条件对林木开花结实的影响等问题,无论是实生种子园还是无性系种子园甚或采种母树林,都应当有所了解,掌握规律以指导园地管理与种子采收。探明这些问题不仅对于良种生产,同时在杂交育种等科研工作方面也是必不可少的。为此,我们对实生马尾松开花结实规律进行了初步研究,现总结如后。
Pinus massoniana habitat and coniferous apologize, is one of the main research content of seed production. For example, the initial flowering age of young trees, the ratio of male and female dome flowers; the number of seedlings in stand period, the difference between years and the distribution of cones in the tree canopy; the impact of site conditions on the flowering and fruiting of forest trees, Seed or clonal seed orchard seed or even planting mother trees, should be aware of, grasp the rules to guide the garden management and seed collection. Proving these issues is not only necessary for the production of improved seeds, but also for scientific research such as cross breeding. To this end, we have a preliminary study of the law of the flowering and fruiting Pinus massoniana, are summarized as follows.