| 摘要: |
| 对引进的欧美杨无性系925号、2223号、3512号和4395号的苗木生长量、抗病性以及幼树生长状况进行了调查分析。结果表明，无性系3512号苗期抗病性强，其1年生苗木叶片平均受害率和感病指数分别为16.96%和7.91，比抗病的107号杨低21.0%和30.9%。无性系925号和2223号速生，幼树生长量超过或接近速生的107号杨，抗病性中等。无性系4395号生长速度和抗病性均较差。造林试验初步表明，4个欧美杨无性系在陕西关中和陕北都能正常生长。 |
| 关键词: 欧美杨 无性系 生长量 抗病性 调查分析 |
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| 基金项目:陕西省科技厅科技攻关项目“杨树新品种选育及油松遗传改良研究”（2002K02-J3-1） |
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| Investigation and analysis of growth on Populus euramercana clones |
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| Abstract: |
| The characteristics of growth and anti-disease on 4 introduced clones of Populs euramercana were investigated and analyzed.The results show that the rate of infteced leaves on clone 3512 is 16.96 percent,and the infection index is 7.91 in one year seedlings,and is less than the clone 107.The clone 925 and clone 2223 are faster than the clone 107 at growth of seedling,and are of mid-resistant to disease.The growth and resistance to disease of the clone 4395 aren't obvious.The experimental results of silvicultrue show that this 4 clones are able to grow mormally in midlle area and north area of Shaanxi province. |
| Key words: Populus euramercana clone growth disease resistance investigation and analysis |
