杨树不同品种伐根嫁接更新效果比较

Comparison of regeneration effect of different Populus varieties for stump grafting

为了筛选出适宜杨树伐根嫁接更新的优良品种,以小美旱杨为砧木,选择038杨、中林46杨、107杨、108杨、埃瑞达诺110杨、中林2001杨、中林2025杨、84K杨和转基因杨9个杨树品种作接穗进行伐根嫁接,调查比较伐桩与不同品种接穗的成活率、保存率以及不同品种杨树平均胸径、平均树高和平均蓄积量。结果表明:1)以小美旱杨为伐桩,84k杨成活率和保存率均最低,其余8种新品种接穗成活率和保存率分别在80%和90%以上;2)84k杨的平均胸径、平均树高以及平均蓄积量均最低;3)中林2001杨、107杨、108杨、埃瑞达诺110杨以及中林2025杨平均胸径均较大,且之间无显著差异,埃瑞达诺110杨、107杨、108杨以及中林2001杨平均树高均较高,且差异不显著,埃瑞达诺110杨、107杨、108杨以及中林2025杨之间平均蓄积量均较大,且差异不显著。综合分析可知,埃瑞达诺110杨、107杨和108杨是适宜杨树伐根嫁接造林的优良品种。

In order to screen superior varieties to suit Populus regeneration by stump grafting, this paper chose 9 different Populus varieties, i. e., Populus x euramericana cl. Zhonglin038, Populus x euramericana el. Zhonglin46, Populus x euramericana cv. Neva, Populus x euramericana cv. Guariento, Populus deltoides x Populus maximowiczii cv. Eridano, Populus x euramericana cl. Zhonglin2001, Populus deltoides cl. Zhonghel, Populus alba x Populus glandulosa and Populus nigra cl. Shiji for stump grafting with Populus simonii as rootstocks, and compared the differences of the survival rates of rootstocks and scions, reservation rate and the average diameter at breast height, average tree height and average volume. The results showed that ： 1） the survival rate and the reservation rate of Populus alba x Populus glandulosa were the lowest, while the survival rate and the reservation rate of other 8 Populus varieties were all higher than 80% and 90%. 2）The average diameter at breast height, the average tree height and the average volume of Populus alba x Populus glandulosa were the lowest as well. 3） The average diameter at breast height of Zhonglin2001, Neva, Guariento, Eridano, and Zhonghelwere bigger and there was no significant difference among them. The tree height of Eridano, Neva, Guariento and Zhonglin2001 were higher, and the difference among them was not significant. The average volume of Eridano, Neva, Guariento and Zhonghel were larger, and there was no significant difference between them. Comprehensively, Eridano, Neva, Guariento are superior varieties for suiting Populus afforestation by stump grafting.