悬铃木开花结实生物生态学特性研究Ⅰ花芽分化分布规律

调查了郑州市 2球悬铃木花芽分化分布规律 .结果表明 ,悬铃木的雄花芽数量远远多于雌花芽数量 ,二球悬铃木的雌雄花芽中 ,分化成 2球的占 1/2以上 ;雌雄花芽主要分布在树冠外围 ,尤其雌花芽在外围的分布比率更大 ;在小枝上 ,顶侧芽分布的花芽最多 ,而其它位置则相对较少 ,雌花芽的分布更是如此 ,导致顶侧芽的雌雄花芽比率增大 .在小枝上的不同侧芽位置 ,1,2 ,3雌雄球的分化比率不同 ,从顶侧芽向下到侧 3,1,2球雌花芽分化比率有减少的趋势 ,而 3球雌花芽比率有上升的趋势 ,与此对应 ,1,2 ,3球雄花芽在各侧芽上的分化比率基本保持不变

Study on bio-ecological characteristics of Platanus acerifolia in blooming and bearing Ⅰ Flower buds'' development and distribution on crown and sprig

The rules of flower buds' development and distribution on crown and sprig of Platanus acerifolia were investigated in Zhengzhou. Results showed that male flower buds are much more than the female, and quantities of flower buds developed into two cones are more than those of one or three cones, and most flower buds exist in the external crown and apical lateral buds on one year branches, and from apical lateral buds to lateral buds 1,2 and 3, the proportion of female flower buds developed into one or two cones gradually decrease, while those buds of three cones gradually increase, compared with these , the proportion of male flower buds developed into one, two and three cones remains unchanged among 4 lateral buds.