| 低硫氮比酸雨对亚热带典型树种气体交换和质膜的影响 |
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| 引用本文： | 冯丽丽,姚芳芳,王希华,杨庆松,杨海波,丁慧明. 低硫氮比酸雨对亚热带典型树种气体交换和质膜的影响[J]. 生态学报, 2011, 31(7): 1911-1917 |
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| 作者姓名： | 冯丽丽 姚芳芳 王希华 杨庆松 杨海波 丁慧明 |
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| 作者单位： | 华东师范大学环境科学系,上海,200062;浙江天童森林生态系统国家野外科学观测研究站,宁波,315114 |
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| 基金项目： | 国家自然科学基金项目(40801196); 华东师范大学科研创新基金(78210063) |
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| 摘 要： | 通过对我国亚热带典型树种香樟(Cinnamomum camphora)、木荷(Schima superba)和枫香(Liquidambar formosana)1年生幼苗为期4个月的模拟酸雨处理,以当地水库水为对照,研究硫氮比(摩尔比)为1.58的酸雨胁迫(中度酸雨pH3.5、重度酸雨pH2.5)下植物气体交换参数、光合色素含量、质膜透性和丙二醛含量等生理指标的变化规律。结果表明:中度酸雨对植物的气体交换和质膜没有造成明显影响。重度酸雨导致叶片净光合速率、气孔导度、蒸腾速率和水分利用效率下降;植物叶片的质膜透性和丙二醛含量显著上升;重度酸雨的氮肥效应虽提高了叶片叶绿素含量,但单位叶绿素的净光合速率仍下降明显。与以往高硫氮比(摩尔比>6)酸雨胁迫研究相比,低硫氮比可能会减缓中度酸雨(pH3.5)对植物气体交换和质膜的负面影响;但是当pH值降至2.5时,酸雨仍然会造成植物气孔部分关闭,膜系统损伤,叶绿素光合活性下降,并最终抑制植物光合作用。
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| 关 键 词： | 模拟酸雨 气体交换参数 质膜透性 硫氮比 |
| 收稿时间： | 2010-03-19 |
| 修稿时间： | 2010-04-23 |
Effects of simulated acid rain with lower S/N ratio on gas exchange and membrane of three dominant species in subtropical forests |
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| FENG Lili,YAO Fangfang,WANG Xihu,YANG Qingsong,YANG Haibo and DING Huiming. Effects of simulated acid rain with lower S/N ratio on gas exchange and membrane of three dominant species in subtropical forests[J]. Acta Ecologica Sinica, 2011, 31(7): 1911-1917 |
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| Authors: | FENG Lili YAO Fangfang WANG Xihu YANG Qingsong YANG Haibo DING Huiming |
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| Affiliation: | School of Resource and Environment Science, East China Normal University, Shanghai 200062, China;Tiantong National Station of Forest Ecosystem, Chinese National Ecosystem Observation and Research Network, Ningbo, Zhejiang 315114, China;School of Resource and Environment Science, East China Normal University, Shanghai 200062, China;Tiantong National Station of Forest Ecosystem, Chinese National Ecosystem Observation and Research Network, Ningbo, Zhejiang 315114, China;School of Resource and Environment Science, East China Normal University, Shanghai 200062, China;Tiantong National Station of Forest Ecosystem, Chinese National Ecosystem Observation and Research Network, Ningbo, Zhejiang 315114, China;School of Resource and Environment Science, East China Normal University, Shanghai 200062, China;Tiantong National Station of Forest Ecosystem, Chinese National Ecosystem Observation and Research Network, Ningbo, Zhejiang 315114, China;School of Resource and Environment Science, East China Normal University, Shanghai 200062, China;Tiantong National Station of Forest Ecosystem, Chinese National Ecosystem Observation and Research Network, Ningbo, Zhejiang 315114, China;School of Resource and Environment Science, East China Normal University, Shanghai 200062, China;Tiantong National Station of Forest Ecosystem, Chinese National Ecosystem Observation and Research Network, Ningbo, Zhejiang 315114, China |
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| Abstract: | Acid rain is a problem of increasing agricultural,environmental,and ecological concerns worldwide.At present NOX emission has exceeded SO2 in eastern China.The purpose of this study was to investigate the possible effects of simulated acid rain with lower S/N ratio on gas exchange and membrane system of three dominant trees in subtropical forests.One-year-old seedlings of Cinnamomum camphora,Schima superba and Liquidambar formosana were transplanted into pots with the local soil(yellow-red soil) at Tiantong... |
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| Keywords: | simulated acid rain gas exchange membrane penetration S/N ratio |
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