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Nitrous and nitric oxide emissions from a cornfield and managed grassland : 11 years of continuous measurement with manure and fertilizer applications, and land-use change

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/70655

Title: Nitrous and nitric oxide emissions from a cornfield and managed grassland : 11 years of continuous measurement with manure and fertilizer applications, and land-use change
Authors: Mukumbuta, Ikabongo Browse this author
Shimizu, Mariko Browse this author
Jin, Tao Browse this author
Nagatake, Arata Browse this author
Hata, Hiroshi Browse this author →KAKEN DB
Kondo, Seiji Browse this author →KAKEN DB
Kawai, Masahito Browse this author
Hatano, Ryusuke Browse this author →KAKEN DB
Keywords: N2O emission
grassland
cornfield
manure and fertilizer
land-use change
Issue Date: Jun-2017
Publisher: Taylor & Francis
Journal Title: Soil science and plant nutrition
Volume: 63
Issue: 2
Start Page: 185
End Page: 199
Publisher DOI: 10.1080/00380768.2017.1291265
Abstract: Changes in weather and management practices such as manure and fertilizer applications have a major effect on nitrous oxide (N2O) and nitric oxide (NO) emissions from soils. N2O and NO emissions exhibit high intra- and inter-annual fluctuations, which are also highly influenced by land-use change. In this study we investigated how land-use change between grassland and cornfield affects soil N2O and NO emissions using long-term field measurements in a mollic andosol soil in Southern Hokkaido, Japan. Soil N2O and NO emissions were monitored for 5years in a 30-year old grassland (OG), which was then plowed and converted to a cornfield for 3years and then converted back to grassland (new grassland, NG) for another 3years. We established four treatment plots: control, without any nitrogen (N) input (CT plot); chemical fertilizer only (F plot); chemical fertilizer and manure (MF plot); and manure only (M plot).Changing land use from OG to cornfield increased annual N2O emissions by 6-7 times, while the change from cornfield to NG resulted in a 0.3-0.6 times reduction in annual N2O emissions. N2O emissions in the newly established grassland were 2-5 times higher than those in the 30-year old grassland. Soil mineral N (NO3- and NH4+) was higher in cornfield, followed by NG and lowest in OG, while water extractable organic carbon (WEOC) did not significantly change with changing land use but tended to be higher in OG and NG than in cornfield. The ratio of WEOC to soil NO3- was the most important explanatory variable for differences in N2O emissions as land use changed. High N input, surplus soil N, and precipitation and low soil pH led to increased N2O emissions. N2O emissions in fertilizer- and/or manure-amended plots were 3-4, 2-5 and 1.4-2 times higher than those in the control treatment in OG, cornfield and NG, respectively. NO emissions were largely influenced by soil mineral N and N addition, and showed less response to changing land use. There were high inter-annual variations in both NO and N2O emissions in all plots, including the control treatment, highlighting the need for long-term measurements when determining local emission rates.
Rights: This is an Accepted Manuscript of an article published by Taylor & Francis in Soil Science and Plant Nutrition on June 2017, available online: http://www.tandfonline.com/10.1080/00380768.2017.1291265
Type: article (author version)
URI: http://hdl.handle.net/2115/70655
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 波多野 隆介

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