Nitrous Oxide Emissions and Its Influencing Factors from an Agricultural Headwater Ditch During a Maize Season in the Hilly Area of Central Sichuan Basin
Agricultural headwater ditches, the important locations for retaining and transforming nitrogen derived from the adjacent farmlands, have been regarded as the potential source of nitrous oxide (N O) emission. In this study, N O emissions from a typical agricultural ditch in the Hilly Area of Central...
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Published in | Huanjing kexue Vol. 38; no. 5; p. 2074 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | Chinese |
Published |
China
08.05.2017
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Abstract | Agricultural headwater ditches, the important locations for retaining and transforming nitrogen derived from the adjacent farmlands, have been regarded as the potential source of nitrous oxide (N
O) emission. In this study, N
O emissions from a typical agricultural ditch in the Hilly Area of Central Sichuan Basin, were observed by closed static chamber-GC technique during the maize season (rainy season), from June to the end of September. During the study period, cumulative N
O emissions in the sediment-water interface without vegetation (NV) and the ditch ecosystem with natural vegetation (V) were 0.07 and 0.43 kg·hm
, respectively. Meanwhile, the mean N
O flux from the agricultural headwater ditch ecosystem[14.7 μg·(m
·h)
] was comparable to the magnitude of direct N
O flux from the maize cropland in this region. Nitrate concentration in the overlying water could be the main factor governing N
O emission from the ditch, especially in the rainy season. The existence of vegetation increased the indirect N
O e |
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AbstractList | Agricultural headwater ditches, the important locations for retaining and transforming nitrogen derived from the adjacent farmlands, have been regarded as the potential source of nitrous oxide (N
O) emission. In this study, N
O emissions from a typical agricultural ditch in the Hilly Area of Central Sichuan Basin, were observed by closed static chamber-GC technique during the maize season (rainy season), from June to the end of September. During the study period, cumulative N
O emissions in the sediment-water interface without vegetation (NV) and the ditch ecosystem with natural vegetation (V) were 0.07 and 0.43 kg·hm
, respectively. Meanwhile, the mean N
O flux from the agricultural headwater ditch ecosystem[14.7 μg·(m
·h)
] was comparable to the magnitude of direct N
O flux from the maize cropland in this region. Nitrate concentration in the overlying water could be the main factor governing N
O emission from the ditch, especially in the rainy season. The existence of vegetation increased the indirect N
O e |
Author | Zhu, Bo Dong, Hong-Wei Ren, Guang-Qian Tian, Lin-Lin Wang, Tao Hu, Lei Zhao, Yuan |
Author_xml | – sequence: 1 givenname: Lin-Lin surname: Tian fullname: Tian, Lin-Lin organization: University of Chinese Academy of Sciences, Beijing 100049, China – sequence: 2 givenname: Bo surname: Zhu fullname: Zhu, Bo organization: Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences, Chengdu 610041, China – sequence: 3 givenname: Tao surname: Wang fullname: Wang, Tao organization: Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences, Chengdu 610041, China – sequence: 4 givenname: Yuan surname: Zhao fullname: Zhao, Yuan organization: University of Chinese Academy of Sciences, Beijing 100049, China – sequence: 5 givenname: Hong-Wei surname: Dong fullname: Dong, Hong-Wei organization: Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences, Chengdu 610041, China – sequence: 6 givenname: Guang-Qian surname: Ren fullname: Ren, Guang-Qian organization: Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences, Chengdu 610041, China – sequence: 7 givenname: Lei surname: Hu fullname: Hu, Lei organization: University of Chinese Academy of Sciences, Beijing 100049, China |
BackLink | https://www.ncbi.nlm.nih.gov/pubmed/29965116$$D View this record in MEDLINE/PubMed |
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Title | Nitrous Oxide Emissions and Its Influencing Factors from an Agricultural Headwater Ditch During a Maize Season in the Hilly Area of Central Sichuan Basin |
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