| 不同水旱轮作体系稻田土壤剖面N2O的分布特征 |
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| 引用本文： | Liu PL,Zhang XL,Xiong ZQ,Huang TQ,Ding M,Wang JY. 不同水旱轮作体系稻田土壤剖面N2O的分布特征[J]. 应用生态学报, 2011, 22(9): 2363-2369 |
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| 作者姓名： | Liu PL Zhang XL Xiong ZQ Huang TQ Ding M Wang JY |
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| 作者单位： | 南京农业大学资源与环境科学学院,江苏省低碳农业与温室气体减排重点实验室,南京210095 |
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| 基金项目： | 国家自然科学基金,教育部新世纪人才支持计划项目,南京市科技发展计划项目,国际合作项目,中央高校基本科研业务费专项,国家重点基础研究发展计划项目,公益性行业(农业)科研专项 |
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| 摘 要： | 通过原位采集淹水和排水状态下土壤剖面4个层次的气体,研究氧化亚氮(N2O)在水旱轮作体系稻田土壤剖面中的动态分布特征.试验设置小麦-单季稻和油菜-双季稻两种轮作体系,包括施N和不施N两种施肥方式.结果表明:施用N肥极显著促进了土壤剖面N2O的产生(P＜0.01),不同层次间N2O浓度相关性极显著(P＜0.01),小麦、油菜生长期施N和无N处理下层30 cm和50 cm处N2O浓度均高于表层7 cm和15 cm处;早稻无N处理则为表层7 cm和15 cm处高于下层30 cm和50 cm处(P＜0.05),其他水稻处理各层次间无显著差异.无N处理土壤N2O峰值出现在旱作向水稻的转变期,施N处理则出现在旱作第2次追肥后,季节转变期也有较高的N2O浓度.
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| 关 键 词： | 氧化亚氮 土壤剖面 稻田 油菜 小麦 耕作制度 |
Distribution characteristics of soil profile nitrous oxide concentration in paddy fields with different rice-upland crop rotation systems |
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| Liu Ping-li,Zhang Xiao-lin,Xiong Zheng-qin,Huang Tai-qing,Ding Min,Wang Jin-yang. Distribution characteristics of soil profile nitrous oxide concentration in paddy fields with different rice-upland crop rotation systems[J]. The journal of applied ecology, 2011, 22(9): 2363-2369 |
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| Authors: | Liu Ping-li Zhang Xiao-lin Xiong Zheng-qin Huang Tai-qing Ding Min Wang Jin-yang |
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| Affiliation: | LIU Ping-li,ZHANG Xiao-lin,XIONG Zheng-qin,HUANG Tai-qing,DING Min,WANG Jin-yang (Jiangsu Province Key Laboratory of Low Carbon Agriculture and GHGs Mitigation,College of Resources and Environmental Sciences,Nanjing Agricultural University,Nanjing 210095,China) |
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| Abstract: | To investigate the dynamic distribution patterns of nitrous oxide (N2O) in the soil profiles in paddy fields with different rice-upland crop rotation systems, a special soil gas collection device was adopted to monitor the dynamics of N2O at the soil depths 7, 15, 30, and 50 cm in the paddy fields under both flooding and drainage conditions. Two rotation systems were installed, i.e., wheat-single rice and oilseed rape-double rice, each with or without nitrogen (N) application. Comparing with the control, N ... |
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| Keywords: | N2O soil profile paddy field oilseed rape wheat cropping system |
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