不同杨树品系引种试验初报

对不同杨树品系的生长量、物候期、抗虫性和抗寒性进行分析比较。结果表明:9年生不同杨树品系单株材积差异极显著,超过平均材积的有‘欧美杨014’、‘111’、‘108’、‘中阳9’、‘F6’和‘中林299’;各品系物候期差异较大,以落叶盛期物候期差异幅度最大,最早与最晚相差22天。‘白城杨’从芽开放期到落叶期的生长期最短,为184天;‘欧美杨108’生长期最长,为202天;各品系除‘中林299’和‘荷兰3930’属于高感虫品系外,其他均为抗虫品系。后期物候期出现较晚的‘欧美杨108’、‘F6’和‘014’均遭受不同程度的冻害,‘欧美杨108’冻害较重。‘欧美杨111’和‘中阳9’无冻害且抗虫性较强,在辽宁省适宜地区具有良好的推广前景。

Report on the performence of introducted poplar clones

The growth,phenophase,insect resistance and cold tolerance of different poplar clones were analyzed and compared.The results showed that there were significant differences in average individual volumes of 9 year-old planatations of different poplar clones.The clones whose volumes were higher than average volume of all clones were Populus×canadensis cl.’014’,’111’,’108’,’Zhongyang 9’,’F6’and’Zhonglin 299’.There were a lot of differences in phenophase of different poplar clones.The maximum difference in phenophase was defoliation.The defoliation period had 22 days variation between the earliest clone and latest one.The growth period of ’Baicheng’was the shortest(184 days) and that of ’108’was the longest(202 days).Most of clones were insect resistant except for ’Zhonglin 299’and ’Helan 3930’which were sensitive to insect.The clones with longer growth period like Populus×canadensis cl.’108’,’F6’and ’014’ were easy to suffer severe frost damage.Populus×canadensis cl.’111’and ’Zhongyang 9’,which were cold-resistance and insect resistance,should popularize in suitable areas of Liaoning Province.