林芝市彩叶树种资源及物候观赏特征

Resources of Colored-leaf Plants and Their Phenological Ornamental Characteristics in Linzhi of Tibet

应用专家咨询法对林芝市彩叶树木种类、物候观赏特征及园林应用进行系统调查。结果表明,林芝市彩叶树种资源分属34科60属80种,其中春色叶、秋色叶、春秋两季色叶、常色叶树种分别为1、47、7、25种,分别占调查彩叶树种的1.25%、58.75%、8.75%、31.25%,存在春色叶树种过少的问题。秋色叶、春秋两季色叶、常色叶树种叶片最佳观赏期平均分别为44.02、85.71、269.56d。树叶色彩上,黄色系、红色系、红-黄色系、其他色系分别为33、28、12、7种,分别占调查彩叶树种的41.25%、35.00%、15.00%、8.75%。该地区引种彩叶树种的物候相变异多发。在调查的基础上,分析了林芝市彩叶树种的应用现状及存在问题,有针对性地提出了解决对策。

By using expert consultation and fuzzy comprehensive evaluation methods, the species, phenological ornamental characteristics, and landscape application of the plants （trees, shrubs, and vines） with colored foliage occurring in Linzhi of Tibet were surveyed. Totally,80 species of the plants with colored foliage were found,belonging to 60 genera and 34 families, in which 1,47, and 7 species exhibited colors in spring,autumn,and spring-autumn,and 25 species were common colored-leaf trees,accounting for 1.25%, 58. 75%,8.75% and 31.25% of the total,respectively. The results indicated the number of plants with colored foliage in spring was few. The number of the plant species with yellow, red,red-yellow,and other leaf colors were 33,28,and 12, accounting for 41.25%,35.00%,15.00%,and 8.75% of the total, respectively. It was also found that high frequency of phonological phase variation occurred in the plant species with colored foliage that were introduced from other regions. Based on the investigation, the current application situations and problems existed were analyzed, and solutions to solve the problems were proposed.