| 遮光对光皮桦苗木存活率及生长效应分析 |
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| 引用本文： | 方乐金,曹健康,方太平.遮光对光皮桦苗木存活率及生长效应分析[J].黄山学院学报,2005,7(6):36-38. |
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| 作者姓名： | 方乐金 曹健康 方太平 |
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| 作者单位： | 黄山学院,资源与环境系,安徽,黄山,245041;绩溪县镇头林场,安徽,绩溪,245321 |
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| 摘 要： | 本研究设遮光度40％、60％、80％和ck（全光照）4种处理，探讨光因子对光皮桦苗木存活率、适合度和生长的影响。研究表明，全光照条件下，死亡最高时期出现在播种后第11～60d（6月11日～7月30日），死亡率高达84．5％，适合度仅为0．0358。遮光度40％和60％两种处理，死亡最高时期出现时间相近，死亡率前者高于后者，分别达71．1％和62．0％，适合度分别达0．1329、0．1740。当遮光度达到80％时，死亡最高时期出现时闻不明显，死亡期延续时间较长，其苗木死亡率（62．8％）、适合度（0．1700）与60％遮光度处理差异不明显。随遮光度增大，苗高、地径、生物量等主要生长指标亦明显增大。生产中采用60％～80％遮光度给光皮样幼苗遮荫可有效地提高光皮桦的苗木存活率和生长规格。
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| 关 键 词： | 光皮桦 苗木 存活率 适合度 生长效应 |
| 文章编号： | 1672-447X（2005）06-0036-03 |
| 收稿时间： | 2005-08-30 |
| 修稿时间： | 2005年8月30日 |
The effects of light intensities on survival rate and growth of Betula luminifera seedlings |
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| Fang Lejin, Cao Jiankang, Huangshan.The effects of light intensities on survival rate and growth of Betula luminifera seedlings[J].Journal of Huangshan University,2005,7(6):36-38. |
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| Authors: | Fang Lejin Cao Jiankang Huangshan |
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| Institution: | Fang Lejin Cao Jiankang Huangshan |
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| Abstract: | s:Light is a main factor which affects survival rate, fitness and growth of Betula luminifera. In this paper, the effects of light factor on survival rate, fitness and growth of Betula luminifera seedling were studied. Four different light intensities100%, 80%, 60% and 40% of light intensity. The results are as follows: There were significant effects of light intensity on survival rate and fitness of seedling. Survival rate and fitness of seedling increased with increasing of light intensity.The death peak of Betula luminifera appeared after 11-60 days of sowing (from 11th june to 30th july) in the condition of 100% light intensity, and death rate was 84.5%, and fitness was 0.0358. The death peak of the two treatments of 40% and 60% light intensity appeared at the same time, but the time of death peak was later than 100% light intensity.The death rate of the two treatments were 71.1% and 62.0% respectively, and the fitness were 0.1329 and 0.1740 respectively?The death peak was not obvious by treating with 80% light intensity, and the seedling had been died in all growth season, death rate and fitness were 62.8% and 0.1700, respectivly. |
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| Keywords: | Betula luminifera seeding survival rate adaption growth effect |
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