| 温度对不同海拔梯度急尖长苞冷杉种子发芽的影响 |
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| 引用本文： | 普布次仁,赵垦田,杨小林.温度对不同海拔梯度急尖长苞冷杉种子发芽的影响[J].云南林业科技,2014(4):132-135. |
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| 作者姓名： | 普布次仁 赵垦田 杨小林 |
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| 作者单位： | 西藏大学农牧学院,西藏林芝860000 |
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| 基金项目： | 植被与环境变化国家重点实验室开放课题（LVEC-2012kf07）. |
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| 摘 要： | 共设＜5℃、5～10℃、10～15℃、15～20℃、20～25℃5个区段温度，研究不同温度对色季拉山不同海拔（3800～4400 m）急尖长苞冷杉种子发芽能力的影响，结果表明：色季拉山急尖长苞冷杉种子的平均千粒重为7.78 g，与其它冷杉属的种子比较，其种子千粒重较小，但有较低海拔（4000 m以下）种子千粒重较大而较高海拔（4000 m以上）种子千粒重较小的趋势；急尖长苞冷杉种子的适宜发芽温度为15～20℃，低于5℃无法发芽；不同海拔急尖长苞冷杉的种子发芽能力不同，以海拔3900 m的急尖长苞冷杉种子发芽率最高，为50％，从海拔3900 m开始，其种子发芽能力随着海拔的升高而逐渐降低。
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| 关 键 词： | 急尖长苞冷杉 海拔 温度 发芽能力 |
Effects of Temperature on Seed Germination of Abies georgei var.smithii under Different Altitudinal Gradient |
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| PU Bu-ciren,ZHAO Ken-tian,YANG Xiao-lin.Effects of Temperature on Seed Germination of Abies georgei var.smithii under Different Altitudinal Gradient[J].Yunnan Forestry Science and Technology,2014(4):132-135. |
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| Authors: | PU Bu-ciren ZHAO Ken-tian YANG Xiao-lin |
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| Institution: | ( College of Agriculture and Animal Husbaudry, Tibet Uuiversity, Linzhi Tibetan Autonomous Region 860000, P. R. China) |
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| Abstract: | The effects of temperature on seed germination of Abies georgei var.smithii under different altitudinal gradient in Shegyla Mountains was studied by setting up 5 kinds of temperature zones （﹤5℃, 5~10℃, 10~15℃, 15~20℃ and 20 ~25℃） . The results showed that the average 1 000 seed weight of Abies georgei var.smithii seed was 7.78 g in Shegyla Mountains , which was smaller than other fir seeds.The trends of seed weight was larger in low altitude （ lower than 4 000 m） and smaller in high altitude （ above 4 000 m） .The suit-able germination temperature for Abies georgei var.smithii seed was 15~20℃.It could not germinate below 5℃. Germination capacity of Abies georgei var.smithii seed was different for different altitudes .The highest seed germi-nation rate was 50 %with an elevation of 3 900 m.With increasing altitude above 3 900 m, the seed germination capacity would be gradually decreasing . |
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| Keywords: | Abies georgei var smithii altitude temperature germination ability |
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