| 富氮营养对枫香幼苗弱光碳平衡能力的影响 |
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| 引用本文： | 王传华,李俊清,杨莹.富氮营养对枫香幼苗弱光碳平衡能力的影响[J].应用生态学报,2011,22(12):3117-3122. |
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| 作者姓名： | 王传华 李俊清 杨莹 |
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| 作者单位： | 1.三峡大学, 湖北宜昌 443000；2北京林业大学森林培育教育部重点实验室, 北京 100083 |
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| 基金项目： | “十一五”国家林业科技支撑计划项目(2006BAD03A16); 三峡大学博士启动资金项目(0620100037)资助 |
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| 摘 要： | 采用室内模拟典型林型光环境和土壤氮素供给的方法,研究了不同光氮处理对枫香幼苗的存活率、叶功能性状、生物量分配和气体交换的影响；应用数学模型估算了不同光氮处理下全株的光补偿点,并与典型林型的林下光合有效辐射加以比较.结果表明： 富氮营养导致3.0%、6.0%透光率时枫香幼苗存活率(耐荫性)和比叶面积下降,而对幼苗生物量分配的影响不明显；富氮营养时光强对叶片最大光合速率影响显著,而弱光下增加氮素供给导致基于质量的叶片暗呼吸速率增加；光、氮对茎呼吸速率有显著影响,而光氮互作对叶呼吸速率有影响；3.0%、6.0%和12.0%透光率时,增加氮素供给使整株补偿点上升,而25.0%透光率下则使其下降.增加氮素供给导致的弱光下枫香幼苗的耐荫性下降与其碳平衡能力变化相关联.在大气氮沉降增加背景下,我国枫香种群的维持可能更加依赖于干扰和林隙更新,进而对其动态产生深刻的影响.
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| 关 键 词： | 枫香 氮素供给 光合作用 碳平衡 |
Effects of eutrophic nitrogen nutrition on carbon balance capacity of Liquidambar formosana seedlings under low light |
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| WANG Chuan-hua
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LI Jun-qing
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YANG Ying.Effects of eutrophic nitrogen nutrition on carbon balance capacity of Liquidambar formosana seedlings under low light[J].Chinese Journal of Applied Ecology,2011,22(12):3117-3122. |
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| Authors: | WANG Chuan-hua LI Jun-qing YANG Ying |
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| Institution: | 1.China Three Gorges University, Yichang, 443000, Hubei, China,2Ministry of Education Key Laboratory for Silviculture and Conservation, Beijing Forestry University, Beijing 100083, China |
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| Abstract: | To investigate the effects of atmospheric nitrogen deposition on the seedlings regeneration of Liquidambar formosana,a greenhouse experiment was conducted,in which,the low light-and nitrogen supplies were controlled similar to those in typical L.formosana secondary forests,with the effects of different light-and nitrogen supply on the L.formosana seedlings survival,leaf functional traits,biomass allocation,and gas exchange studied.The whole plant light compensation point(LCPwhole-plant) of the seedlings was... |
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| Keywords: | Liquidambar formosana nitrogen supply photosynthesis carbon balance |
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