| 田间大豆植株N2O通量的测定及光照的影响 |
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| 引用本文： | 于克伟,黄斌,陈冠雄,吴杰.田间大豆植株N2O通量的测定及光照的影响[J].生态学杂志,1997,8(2):171-176. |
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| 作者姓名： | 于克伟 黄斌 陈冠雄 吴杰 |
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| 作者单位： | 中国科学院沈阳应用生态研究所, 沈阳 110015 |
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| 基金项目： | 国家攀登计划基金(No.27);中国科学院陆地生态系统痕量物质生态过程开放实验室基金 |
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| 摘 要： | 采用封闭式箱法,在田间自然状况下对大豆植株N2O通量进行了测定.结果表明,在主要生育期内,大豆植株N2O通量有2个释放高峰,分别位于苗期和开花结荚期.大豆植株N2O通量的昼间变化模式基本上为上午有1个释放高峰,而下午有一个释放低谷.施肥和对照小区N2O平均通量分别为2.27和1.28μgN2Om-2·h-1.在较强的光照条件下(104lx数量级),大豆植株N2O通量较低,甚至可吸收大气中的N2O,而在较弱光照条件下(103～102lx数量级),大豆植株N2O通量较高.
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| 关 键 词： | 大豆植株 N2O通量 光照 |
| 收稿时间： | 1996-06-07 |
Field measurement of N2O flux from soybean plant and effect of light on it |
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| Yu Kewei,Huang Bin,Chen Guanxiong,Wu Jie.Field measurement of N2O flux from soybean plant and effect of light on it[J].Chinese Journal of Ecology,1997,8(2):171-176. |
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| Authors: | Yu Kewei Huang Bin Chen Guanxiong Wu Jie |
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| Institution: | Institute of Applied Ecology, Academia Sinica, Shenyang 110015 |
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| Abstract: | The N2O flux from soybean plant measured by closed chamber method under field condition shows that there exist two peaks of N2O emission at soybean's seedling and flowering stages,respectively. The general pattern of diurnal variation in N2O flux from soybean plant is an emission peak in the morning and a valley in the afternoon,which is not altered by fertilization.The average N2O emission rates are 2.27 and 1.28 μgN2Om-2 ·h-1 for fertilized and control plots,respectively. Soybean plant has a lower N2O flux under strong light condition (in the level of 104lx), even absorbing the atmospheric N2O.But under weak light condition (in the level of 103～102lx),N2O flux from soybean plant is higher. |
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| Keywords: | Soybean plant N2O flux Light |
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