光照、碳源和还原力对大豆玉米苗期氧化亚氮释放量的影响

应用生态学报 ›› 2004, Vol. ›› Issue (10): 1851-1854.

光照、碳源和还原力对大豆玉米苗期氧化亚氮释放量的影响

李玥莹^1,2, 杨宇³, 张旭东¹, 陈冠雄¹

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;
2. 沈阳师范大学生物系, 沈阳 110034;
3. 沈阳农业大学, 沈阳 110161

收稿日期:2003-12-20 修回日期:2004-06-25 出版日期:2004-10-15
通讯作者: 陈冠雄
基金资助:
国家自然科学基金项目(30270131);中国科学院“百人计划”资助项目

Effects of illumination,carbon source and reducing power on N₂O emission from maize and soybean seedlings

LI Yueying^1,2, YANG Yu³, ZHANG Xudong¹, CHEN Guanxiong¹

1. Key Laboratory of Terrestrial Ecological Process, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
2. Department of Biology, Shenyang Normal University, Shenyang 110034, China;
3. Shenyang Agricultural University, Shenyang 110161, China

Received:2003-12-20 Revised:2004-06-25 Online:2004-10-15

摘要/Abstract

摘要： 使用封闭式箱法,对大豆和玉米两种植物在苗期的N₂O释放速率日变化及其同光强、气温的相关性进行了研究,同时对遮光、外加碳源和还原力对N₂O释放速率的影响进行了分析.结果表明,两种植物苗期N₂O释放速率在日间有两个释放高峰,分别出现在10:30和14:30.遮光处理实验结果证明,遮光后植物的N₂O释放速率明显增加;相关性分析表明,苗期大豆在光强低于11 345 Lx时,N₂O释放速率与光强呈正相关关系(R²=0.7332),光强高于11 35 Lx时,呈负相关关系(R²=0.7755),而苗期玉米在光强低于20000 Lx时,N₂O释放速率与光强呈正相关关系(R²=0.8711),光强高于11 345 Lx时,呈负相关关系(R²=0.8972).加入一定量的碳源(葡萄糖),可使遮光植物N₂O的释放速率明显下降,由于同化力(NADH)的介入,在一定程度上影响了N₂O的排放通量,同样使得N₂O的释放量下降.

关键词: 大豆, 玉米, 幼苗, N₂O排放通量, 光照, 碳源, NADH

Abstract: The closed chamber measurement of N₂O emission from soybean and maize seedlings showed that there were two peaks (10:30 and 14:30) of N₂O flux at the daytime.There was a correlation between N₂O emission and illumination.The variation of illumination had a significant influence on N₂O flux from soybean and maize seedlings.There was a positive correlation between N₂O emission and illumination when the illumination was below 11 345 Lx (for soybean,R² = 0.7332) or 2 000 Lx (for maize,R² =0.8711),and a negative correlation when the illumination was over 11 345 Lx (for soybean,R² = 0.7755) or 20 000 Lx (for maize,R² =0.8972).Addition of carbon source (glucose) and NADH (reducing power) decreased N₂O flux.

Key words: Soybean, Maize, Seedlings, N₂O emission, Illumination, Carbon source, NADH (reducing power)

中图分类号:

Q945.1

李玥莹, 杨宇, 张旭东, 陈冠雄. 光照、碳源和还原力对大豆玉米苗期氧化亚氮释放量的影响[J]. 应用生态学报, 2004, (10): 1851-1854.

LI Yueying, YANG Yu, ZHANG Xudong, CHEN Guanxiong. Effects of illumination,carbon source and reducing power on N₂O emission from maize and soybean seedlings[J]. Chinese Journal of Applied Ecology, 2004, (10): 1851-1854.

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