高山杜鹃成都平原越夏生长研究

为加强对高山杜鹃的引种栽培,筛选出适合成都平原栽植的高山杜鹃品种,对引进的11个品种高山杜鹃的整株生长指标（冠幅、株高、地径、分蘖能力）、枝条生长指标（分枝数、最长分枝长度、单枝粗度、最长枝叶片数）、叶片生长指标（叶长、叶宽、叶片厚度）、夏稍长度以及热害指数进行评估。结果表明,引进的11个品种高山杜鹃均能在一定程度上适应成都平原越夏生长,其中‘王妃’的综合表现最好,尤其是其冠幅、株高、地径、最长分枝长度、单枝粗度、叶长、叶宽,在引种2个月后的增幅分别达到了131.43%、155.07%、53.79%、103.65%、26.66%、21.51%、27.34%;‘喜悦’的热害指数最低,几乎不受害。此外,‘粉蜜’、‘红溢’也表现不俗。因此,引进高山杜鹃品种‘王妃’、‘粉蜜’、‘红溢’、‘喜悦’适应成都平原的越夏生长,可进一步推广栽植。

Study on the Summer Growth of Rhododendron lapponicum in Chengdu Plain

To improve the introduction and cultivation of Rhododendron lapponicum, varieties that suitable for planting in Chengdu plain were selected. Growth index of the whole plant (crown width, plant height, ground diameter, tillering ability), branches (number of branches, longest branch length, single branch thickness, the number of leaf at the longest branch), leaf (leaf length, leaf width, leaf thickness), summer branches length and heat damage index were evaluated of 11 species of R. lapponicum introduced in this study. The results showed that the 11 varieties of R. lapponicum introduced could adapt to the summer growth in Chengdu plain to a certain extent, among which ‘Royal’ was the most suitable, the increasing of its crown width, plant height, ground diameter, the longest branch length, single branch thickness, the leaf length and the leaf width reached 131.43%, 155.07%, 53.79%, 103.65%, 26.66%, 21.51%, and 27.34%, respectively. The heat injury index of ‘Cheer’ was 0, the lowest. In addition, ‘Pink Honey’, ‘Red Overflowing’ also had good performance. Therefore, ‘Royal’, ‘Pink Honey’, ‘Red Overflowing’, and ‘Cheer’ are able to adapt to the summer growth at Chengdu plain, and could be further promoted.