| 大叶白蜡幼苗生长对不同光强遮荫处理的响应 |
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| 引用本文： | 闫兴富,方苏,周立彪,任玉锋.大叶白蜡幼苗生长对不同光强遮荫处理的响应[J].西北林学院学报,2010,25(1). |
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| 作者姓名： | 闫兴富 方苏 周立彪 任玉锋 |
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| 作者单位： | 北方民族大学,生命科学与工程学院,宁夏,银川,750021 |
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| 基金项目： | 国家民委生态系统模型及应用重点实验室重点资助项目，北方民族大学科研项目 |
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| 摘 要： | 在不同光照梯度(55.44%自然全光照(natural sunlight,NS)、21.12%NS、3.47%NS和0.86%NS)的人工遮荫条件下,研究了大叶白蜡(Fraxinus rhynchophylla)幼苗的生长特点。结果表明,幼苗株高、基径、主根长、单株叶面积、总干重、相对生长率和净同化率等生长参数均在55.44%NS最大,分别为70.0 cm、6.84 mm、31.95 cm、798.80 cm2、10.28 g、31.13×10-3g.d-1和3.25×10-5g.cm-2.d-1,而且随光照的减弱而减小。幼苗比叶面积随着光照强度的减弱先增大后减小,在3.47%NS处理最大(597.43 cm2.g-1)。
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| 关 键 词： | 光照强度 遮荫处理 大叶白蜡 幼苗生长 |
Responses of Fraxinus rhynchophylla Seedlings to Shading Under Different Lilght Regimes |
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| YAN Xing-fu,FANG Su,ZHOU Li-biao,REN Yu-feng.Responses of Fraxinus rhynchophylla Seedlings to Shading Under Different Lilght Regimes[J].Journal of Northwest Forestry University,2010,25(1). |
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| Authors: | YAN Xing-fu FANG Su ZHOU Li-biao REN Yu-feng |
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| Institution: | YAN Xing-fu,FANG Su,ZHOU Li-biao,REN Yu-feng(College of Life Science , Engineering,Northern University for Nationalities,Yinchuan,Ningxia 750021,China) |
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| Abstract: | Under different light regimes:55.44% natural sunlight (NS), 21.12% NS,3.47% NS and 0.86% NS in shade house, the growth characteristics of Fraxinus rhynchophylla seedlings were observed. The results showed that seedling height, basal shoot diameter, taproot length, leaf area per seedling, total dry weight, relative growth rate and net assimilation rate all maximized (70.0 cm, 6.84 mm, 31.95 cm, 798.80 cm~2, 10.28 g, 31.13×10~(-3)g·d~(-1), and 3.25×10~(-5) g·cm~(-2)·d~(-1) respectively) under 55.44% NS shade treatment and reduced with the decrease of light intensity. With the reduction of light intensity, the specific leaf area of F. Rhynchophylla seedlings increased to its maximum (597.43 cm~2·g~(-1)) under the shade treatment of 3.47% NS, after which a decrease was observed. |
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| Keywords: | light intensity shade treatment Fraxinus rhynchophylla seedling growth |
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