|
|||||
|
|
| 地表臭氧浓度升高对旱作农田N2O排放的影响 | |
| 引用本文： | 吴杨周,胡正华,李岑子,陈书涛,谢燕,肖启涛.地表臭氧浓度升高对旱作农田N2O排放的影响[J].环境科学,2015,36(2):636-643. |
| 作者姓名： | 吴杨周 胡正华 李岑子 陈书涛 谢燕 肖启涛 |
| 作者单位： | 1. 南京信息工程大学气象灾害预报预警与评估协同创新中心，南京 210044; 南京信息工程大学应用气象学院，南京 210044 2. 南京信息工程大学气象灾害预报预警与评估协同创新中心，南京 210044; 南京信息工程大学江苏省农业气象重点实验室，大气环境中心，南京 210044; 南京信息工程大学应用气象学院，南京 210044 3. 南京信息工程大学应用气象学院,南京,210044 4. 南京信息工程大学江苏省农业气象重点实验室，大气环境中心，南京 210044; 南京信息工程大学应用气象学院，南京 210044 |
| 基金项目： | 国家自然科学基金项目(41175136, 41375006); 江苏省农业气象重点实验室开放课题项目(KYQ1302); 江苏省高校"青蓝工程"项目 |
| 摘 要： | 通过田间试验,在冬小麦和大豆生长季设置3种不同臭氧(O3)浓度的处理,包括自由空气(对照,CK)、100 n L·L-1O3浓度(T1)和150 n L·L-1O3浓度(T2),采用静态箱-气相色谱法测定N2O排放通量,研究地表O3浓度升高对冬小麦-大豆轮作系统N2O排放的影响.结果表明,与CK相比,在冬小麦返青期,T1和T2处理都降低了土壤-冬小麦系统N2O累积排放量,降幅分别为37.8%(P=0.000)和8.8%(P=0.903);在拔节-孕穗期,T1和T2处理使N2O累积排放量分别降低了15.0%(P=0.217)和39.1%(P=0.000);从冬小麦全生育期来看,T1、T2的N2O累积排放量分别降低了18.9%(P=0.138)和25.6%(P=0.000).由于本年度大豆生长季降水偏少,受干旱胁迫的影响,O3浓度升高对大豆田N2O排放的作用不明显.本研究表明地表O3浓度升高会减少旱作农田N2O排放量. |
| 关 键 词： | 臭氧 冬小麦 大豆 土壤 N2O排放 |
| 收稿时间： | 2014/5/10 0:00:00 |
| 修稿时间： | 2014/9/11 0:00:00 |
Impacts of Elevated Ozone Concentration on N2O Emission from Arid Farmland |
|
| WU Yang-zhou,HU Zheng-hu,LI Cen-zi,CHEN Shu-tao,XIE Yan and XIAO Qi-tao.Impacts of Elevated Ozone Concentration on N2O Emission from Arid Farmland[J].Chinese Journal of Environmental Science,2015,36(2):636-643. | |
| Authors: | WU Yang-zhou HU Zheng-hu LI Cen-zi CHEN Shu-tao XIE Yan and XIAO Qi-tao |
| Institution: | Collaborative Innovation Center on Forecast Meteorological Disaster Warning and Assessment, Nanjing University of Information Science & Technology, Nanjing 210044, China;College of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China;Collaborative Innovation Center on Forecast Meteorological Disaster Warning and Assessment, Nanjing University of Information Science & Technology, Nanjing 210044, China;Yale-NUIST Center on Atmospheric Environment, Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China;College of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China;College of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China;Collaborative Innovation Center on Forecast Meteorological Disaster Warning and Assessment, Nanjing University of Information Science & Technology, Nanjing 210044, China;College of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China;College of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China;Yale-NUIST Center on Atmospheric Environment, Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China;College of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China |
| Abstract: | To investigate the impact of elevated surface ozone (O3) concentration on nitrous oxide (N2O) emission from arid farmland, field experiments were carried out during winter-wheat and soybean growing seasons under the condition of simulating O3 concentrations, including free air (CK), 100 nL·L-1 O3 concentration (T1), and 150 nL·L-1 O3 concentration (T2). N2O emission fluxes were measured by static dark chamber-gas chromatograph method. The results showed that the accumulative amount of N2O (AAN) were decreased by 37.8% (P=0.000) and 8.8% (P=0.903) under T1 and T2 treatments, respectively, in the turning-green stage of winter wheat. In the elongation-booting stage, ANN were decreased by 15.0% (P=0.217) and 39.1% (P=0.000) under T1 and T2 treatments, respectively. ANN were decreased by 18.9% (P=0.138) and 25.6% (P=0.000) under T1 and T2 treatments, respectively, during the whole winter-wheat growing season. No significant impact of elevated O3 concentration on N2O emission from soil-soybean system was found due to the less rainfall during the soybean growing season, drought had a stronger stress on soybean than O3 concentration. The results of this study suggested that elevated O3 concentration could reduce N2O emission from arid farmland. |
| Keywords: | ozone winter wheat soybean soil N2O emission |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |
| 点击此处可从《环境科学》浏览原始摘要信息 | |
| 点击此处可从《环境科学》下载免费的PDF全文 | |