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Title: Nitrous oxide emission from uplands in Northern China

Author
item QIN, SHUPING - Chinese Academy Of Sciences
item HU, CHUNSHENG - Chinese Academy Of Sciences
item Ahuja, Lajpat
item ZHANG, YUMING - Chinese Academy Of Sciences
item WANG, YUYING - Chinese Academy Of Sciences

Submitted to: Advances in Agricultural Systems Modeling
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 3/15/2015
Publication Date: 2/5/2016
Citation: Qin, S., Hu, C., Ahuja, L.R., Zhang, Y., Wang, Y. 2016. Nitrous oxide emission from uplands in Northern China. Advances in Agricultural Systems Modeling. 6:1-20.

Interpretive Summary: For uplands with high pH, low groundwater table and low dissolved organic carbon content, such as the Northern China, nitrification may play an important role in soil N2O emission. The microbial mechanisms and controls seem to be different in soils with high groundwater table, e.g., the Northern Europe. Although nitrogen fertilization inevitably increase N2O emission, the good new here is that the lowest yield-scaled N2O emissions were obtained at modest N application rates (and not at zero application). Modeling soil N2O flux is still difficult because of its large temporal and spatial variation. More attention should be paid on the process-based models for accurate estimation of soil N2O emission.

Technical Abstract: For uplands with high pH, low groundwater table and low dissolved organic carbon content, such as the Northern China, nitrification may play an important role in soil N2O emission. The microbial mechanisms and controls seem to be different in soils with high groundwater table, e.g., the Northern Europe. Although nitrogen fertilization inevitably increase N2O emission, the good new here is that the lowest yield-scaled N2O emissions were obtained at modest N application rates (and not at zero application). Modeling soil N2O flux is still difficult because of its large temporal and spatial variation. More attention should be paid on the process-based models for accurate estimation of soil N2O emission.