东兴金花茶枝、花、果实在树冠上的分布格局及其相互关系

Distribution patterns of shoots,flowers and fruits in Camellia indochinensis var. tunghinensiscanopy and their relationships

采用分层调查法研究了东兴金花茶(Camellia indochinensis var.tunghinensis)自然种群植株树冠上枝、花、果实的分布格局及其相互关系。结果表明,东兴金花茶生长缓慢,其基径达1.5 cm以上才能开花;枝条组成较复杂,分枝级数多,可达6级;三级至六级分枝均随冠层自上而下递增,下层的五级和六级分枝占总枝条数的百分比分别为4.06%和0.38%;整体而言,三级分枝在树冠上的分布最多,占总枝条数的38.37%;营养枝的数量比现蕾枝多,现蕾枝随冠层自中上层至下层递减,营养枝则不同;分枝角度较小,70°~90°仅占总枝量的11.56%;现蕾较多,但落蕾率高,花分布于1~3年生枝条上的2~4叶位;果实多分布于树冠中下层,冠周边比冠心稍多。东兴金花茶的枝条数、花蕾数和果实数在不同冠层的分布具有紧密联系。

The distribution patterns and their interrelations of branches,flowers and fruits in the canopy of wild Camellia indochinen⁃sis var.tunghinensis were investigated with the stratified survey method.The results showed that Camellia indochinensis var.tunghinen⁃sis grew slowly,it bloomed when its base diameter got 1.5 cm;the branch composition of Camellia indochinensis var.tunghinensis was complex,its multi-branched series was up to 6 levels,3~6 levels were increasing from the top canopy to the bottom,and the 5 and 6 levels were 4.06%and 0.38%,respectively;overall,the third-level branch was the most in the canopy,accounting for 38.37%of to⁃tal fruit branch.The number of nutrition branches was more than the budding ones,and the latter was descending from middle top to bottom along the canopy,while the former was different;the branching angle was small,70°~90°accounted for 11.56%of the total;there were many flower buds,but the rate of fallen ones was high.The flowers distributed on 2~4 leaf positions in 1~3-year-old branches;fruits mostly distributed in the middle and bottom of canopy,and the peripheral was more than the center.The number of branches,flower buds and fruits in different canopy layers was closely correlated.