| 不同光强条件下树木释放N2O的研究 |
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| 引用本文： | 张秀君,陈冠雄,徐慧.不同光强条件下树木释放N2O的研究[J].应用生态学报,2002,13(12):1563-1565. |
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| 作者姓名： | 张秀君 陈冠雄 徐慧 |
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| 作者单位： | 1. 中国科学院沈阳应用生态研究所,陆地生态过程重点实验室,沈阳,110016;沈阳教育学院,沈阳,110016
2. 中国科学院沈阳应用生态研究所,陆地生态过程重点实验室,沈阳,110016 |
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| 基金项目： | 国家自然科学基金项目 (4 970 10 16，3 9770 0 66)，中国科学院百人计划资助项目 |
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| 摘 要： | 首次采用封闭罩法，对阳生树木（水曲柳，红松和赤杨）及阴生树木（椴树）的连体及离体枝叶在不同光强下的N2O释放进行了野外原位观测。结果表明，阳生树木与阴性树木的N2O释放对光的反应不同，阳生树木的N2O释放受光强的调节规律同以往对农作物等的研究结果一致；而阴生树木椴树的N2O速率在强光下N2O释放较多，弱光下释放减少甚至吸收大气N2O，其N2O释放速率与光强呈显著线性正相关关系。
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| 关 键 词： | 光强条件 阳生树木 阴生树木 N2O释放 |
| 文章编号： | 1001-9332(2002)12-1563-03 |
| 修稿时间： | 2001年8月23日 |
N2O emission from trees under different light irradiances |
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| ZHANG Xiujun ,CHEN Guanxiong ,XU Hui.N2O emission from trees under different light irradiances[J].Chinese Journal of Applied Ecology,2002,13(12):1563-1565. |
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| Authors: | ZHANG Xiujun CHEN Guanxiong XU Hui |
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| Institution: | Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang College of Education, Shenyang 110016. |
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| Abstract: | This paper firstly measured in situ N 2 O emission from branches and leaves of sun plants ( Fraxinus mandshurica,Pinus koraiensis,Alnus hirsuta ) and shade tolerant plants ( Tilia amurrensis ) under different light irradiances in closed chamber. Light irradiance had contrast effects on N 2 O emission flux from sun and shade tolerant tree species. In the test sun plants,more N 2 O was emitted under weak light than under strong light. The emission rates decreased with increasing irradiances,and even absorption instead of emission of N 2 O was detected under strong light. In contrast to sun plants,in the shade tolerant plant T.amurrensis ,there was more N 2 O emission under strong light than under weak light,and N 2 O absorption from environment was detected under weak light. |
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| Keywords: | Light irradiances Sun plant Shade tolerant plant N 2 O emission |
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