论文部分内容阅读
１９８６～１９９４年，研究了卢氏油松种子园无性系雌雄球花在树冠中的空间分布特征，以掌握油松种子园无性系开花结实习性。结果表明，不同无性系雌雄球花垂直分布可分为３种分布型，雌球花以单峰和平缓型为主，雄球花则以偏峰型较常见。雌球花水平分布集中在树冠一级侧枝外缘１～５ａ的轮生枝上，约占总花量的９０．４％，雄球花主要分布在树冠内膛生长细弱的枝条上，在冠缘１～５ａ生的轮生枝上着生的雄球花只占总花量的２３．３％，两者均呈现不平衡分布模式。雌雄球花在新梢上的侧梢着生花量所占比例分别为２８．５％和２３．８％，无性系间雌雄球花顶侧梢着生花量和比例亦存在差异。按枝序的排列方式，雌球花较多分布在各轮层一级侧枝１～５ａ生轮生枝中１～３ａ生的侧枝上，平均为９２．６％，雄球花则大多集中在各轮层一级侧枝９～１２ａ生轮生枝中１～３ａ生的侧枝上，平均为６１．８％。雌球花在树冠光照条件较好的南向枝分布居多，雄球花在不同方位间存在一定差异，但比雌球花小。作者讨论了油松树冠受光环境与雌雄球花空间分布的关系，提出了油松种子园无性系整形修剪的初步设想。
From 1986 to 1994, the spatial distribution characteristics of male and female Hypocrea sp. Populations in Pinus tabulaeformis seed orchard were studied to understand the flowering and seed-setting habits of Pinus tabulaeformis seed orchard clones. The results showed that the vertical distribution of male and female flowers in different clones could be divided into three distribution types. The main types of female flowers were single peak and flat type, while the male peak flowers were more common. The concentration distribution of female flowers was concentrated on the branches of 1 ~ 5a on the outer edge of the first branch of crown, accounting for 90.4% of the total flowers. The male flowers were mainly distributed on the thin branches growing in the crown of the crown, Male flowers dominated on the whorls of 1 ~ 5a accounted for only 23.3% of the total flowers, both of which showed an unbalanced distribution pattern. Male and female ball flowers in shoots on the tip of the flower with the proportion of 28.5% and 23.8%, respectively, male and female flowers in the top of the male and female ball flowers and the proportion of the flower there are also differences. According to the arrangement of branches and branches, the female flowers are mostly distributed on the side branches of 1 ~ 3a of the first to fifth branches of the first to fifth branches of the first round, with an average of 92.6%. The male flowers are mostly concentrated in the On the lateral branches of the first to third lateral branches of 9 ~ Female flowers in the crown light conditions better southern branches are mostly male flowers in different directions there are some differences, but smaller than the female ball flowers. The author discussed the relationship between the light-receiving environment of the canopy and the spatial distribution of the male and female flowers, and put forward the tentative plan of pruning the clones of Pinus tabulaeformis seed orchard.