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对江苏徐州铜山区林业局引进的69、72、NL-105、NL-106、89、895、35和351等8个杨树无性系1a生扦插苗的年生长节律进行研究。供试无性系存在显著差异。比较结果显示,69和72在徐州地区表现最佳,895、35表现相对较差,69的苗高生长量分别是895、35的129%、116%;69的地径生长量是895、35的143%、119%;72的苗高生长量分别是895、35的121%、108%;69的地径生长量是895、35的158%、131%,地径指标的差异性明显大于苗高指标。本试验为进一步选择适应本地土壤、气候和水分等条件的优良杨树品种提供了有益的参考。
The rhythm of annual growth of eight clones of poplar clones, 69,72, NL-105, NL-106, 89,895,35 and 351, introduced from Tongshan Forestry Bureau of Xuzhou, Jiangsu Province was studied. There were significant differences in the tested clones. The results showed that 69 and 72 were the best performing in Xuzhou, while 895 and 35 showed relatively poor performance. The growth height of 69 was 129% and 116% of 895 and 35 respectively, and the growth of 69 was 895 and 35 143% and 119% respectively. The growth of 72 seedling height was 121% and 108% of 895 and 35 respectively. The growth of ground diameter of 69 was 158% and 131% of 895 and 35, respectively, and the difference of ground diameter index was obviously greater than Seedling height index. This experiment provides a useful reference for further selection of good poplar varieties that adapt to local soil, climate and water conditions.