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The main characteristic of this method is the inclusion of extremely high N_2O emission rates, ‘outlier’, which are normally excluded from estimation. High N_2O emission rates were estimated using the regression model obtained from the measured N_2O values and the amounts of N surplus; normal N_2O emission rates were estimated using the regression model obtained from the measured values and the amount of N input. The probability of occurrence of a high flux was used to incorporate calculated high and normal N_2O emissions into one. The annual N_2O emission rate from the livestock farm in the watershed (467 ha), estimated using the HEI method, was 1156 ± 147 kg N year^\u003c−1\u003e over a 5-year period. The annual N_2O emission rates calculated using the site-specific emission factor (EF = 0.0789) and the emission factor of the Intergovernmental Panel on Climate Change (EF = 0.01) were 1838 ± 585 kg N year^\u003c−1\u003e and 673 (522-1103) kg N year^\u003c−1\u003e, respectively. 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New method for the estimation of nitrous oxide emission rates from an agricultural watershed
http://hdl.handle.net/10659/1698
http://hdl.handle.net/10659/16980a491a7b-6203-4032-b4e1-3c3e2fac7990
名前 / ファイル | ライセンス | アクション |
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S-881_Sawamoto.pdf (630.8 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2011-03-31 | |||||
タイトル | ||||||
タイトル | New method for the estimation of nitrous oxide emission rates from an agricultural watershed | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | emission factor | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | high-emission-incorporation method | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | measure-and-multiply method | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | outlier | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | uncertainty | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
KATAYANAGI, Nobuko
× KATAYANAGI, Nobuko× 澤本, 卓治× HAYAKAWA, Atsushi× HATANO, Ryusuke |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | We developed a new and improved method, the ‘high-emission-incorporation (HEI) method’, for estimating soil nitrous oxide (N_2O) emission rates at a watershed level based on nitrogen (N) input (consisting of fertilizer, manure, slurry and excreta N) and N surplus (calculated by subtracting the amount of crop yield and consumed N from the N input) of different sites in a livestock farm located in a watershed. The main characteristic of this method is the inclusion of extremely high N_2O emission rates, ‘outlier’, which are normally excluded from estimation. High N_2O emission rates were estimated using the regression model obtained from the measured N_2O values and the amounts of N surplus; normal N_2O emission rates were estimated using the regression model obtained from the measured values and the amount of N input. The probability of occurrence of a high flux was used to incorporate calculated high and normal N_2O emissions into one. The annual N_2O emission rate from the livestock farm in the watershed (467 ha), estimated using the HEI method, was 1156 ± 147 kg N year^<−1> over a 5-year period. The annual N_2O emission rates calculated using the site-specific emission factor (EF = 0.0789) and the emission factor of the Intergovernmental Panel on Climate Change (EF = 0.01) were 1838 ± 585 kg N year^<−1> and 673 (522-1103) kg N year^<−1>, respectively. The estimated value using the measure-and-multiply method, in which each land-use area is multiplied by the representative emission rate for each land-use type, was 964 (509-1610) kg N year^<−1>. The N_2O emission rates estimated by our newly developed method were consistent with the values calculated by the measure-and-multiply method and offered improvement over this measure because the new measure can also predict future N_2O emission rates from the watershed. | |||||
書誌情報 |
Soil science and plant nutrition 巻 55, 号 4, p. 590-598, 発行日 2009-08 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0038-0768 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1111/j.1747-0765.2009.00395.x | |||||
権利 | ||||||
権利情報 | The definitive version is available at www.blackwellsynergy.com | |||||
権利(URI) | ||||||
権利情報 | http://dx.doi.org/10.1111/j.1747-0765.2009.00395.x | http://dx.doi.org/10.1111/j.1747-0765.2009.00395.x | |||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
その他のタイトル | ||||||
その他のタイトル | A new method for estimation of nitrous oxide emission rates from an agricultural watershed | |||||
出版者 | ||||||
出版者 | Blackwell Publishing | |||||
資源タイプ | ||||||
内容記述タイプ | Other | |||||
内容記述 | Article |