几种常绿彩叶树种年生长量调查分析

Investigation and Analysis of Annual Growth of Several Evergreen Color Leaf Species

以金边假连翘、彩叶女贞、五彩桂、金冠黄杨、黄金香柳、火焰南天竹6种常绿彩叶植物为材料,通过测定株高、冠幅、基径、枝长、枝数的年生长变化,比较茎枝年生长量的差异,并结合各指标的相关性分析对6种植物在幼龄期的生长分化特性进行分析。结果表明:6种彩叶植物在株高、冠幅、基径、枝长、枝数增量方面存在显著差异,其中金边假连翘的年增长量最大,其次为黄金香柳和彩叶女贞,两者在株高、冠幅、基径、枝数的增量上较为接近,但在枝长方面黄金香柳显著高于彩叶女贞;与以上3种植物相比,火焰南天竹和金冠黄杨年生长量显著降低,两者在冠幅、基径、枝数增长方面无显著差异,在株高和枝长方面火焰南天竹增幅明显较高;除基径外,五彩桂的株高、冠幅、枝长、枝数增量均最小。结合加权隶属函数值的评价结果,6种彩叶树种年生长量从大到小依次为金边假连翘、黄金香柳、彩叶女贞、火焰南天竹、金冠黄杨和五彩桂。

Using Six species of evergreen color leaf plants as materials,the differences of annual growth of stem and branch were compared,and the growth and differentiation characteristics of six species of plants in their young age were analyzed combined with the correlation analysis of each index,by measuring the annual growth changes of plant height,crown diameter,base diameter,branch length and branch number.The results showed that there were significant differences in plant height,crown breadth,base diameter,branch length and branch number increment among the six species of colorful leaf plants,among which the annual increment of Duranta erecta′Golden Leaves′in Phnom Penh was the largest,followed by Melaleuca bracteata and Ligustrum lucidum.They were close in plant height,crown breadth,base diameter and branch number increment,but Melaleuca bracteata was significantly higher than Ligustrum lucidum in branch length.Compared with the above three kinds of plants,the annual growth of Nandina domestica‘Firepower’and Euonymus japonicus decreased significantly,but there was no significant difference in crown diameter,base diameter and number of branches between them.But Nandina domestica‘Firepower’was significantly higher in plant height and branch length.The increment of plant height,crown width,branch length and branch number were the smallest except base diameter.The increment of plant height,crown breadth,branch length and branch number of five color osmanthus was the smallest except base diameter.Combined with the evaluation results of weighted membership function,the annual growth of six color leaf species was from large to small in order of Duranta erecta′Golden Leaves′,Melaleuca bracteata F.Muell,Ligustrum lucidum‘Excelsum Superbum’,Nandina domestica‘Firepower’,Euonymus japonicuscv.Aureo-marginatus and Phnom Penh kolor wy Gui.