Modeling of nitrous oxide emissions from tea field soils
| Project/Area Number |
26850155
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Rural environmental engineering/Planning
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| Research Institution | National Agriculture and Food Research Organization |
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Principal Investigator |
Hirono Yuhei 国立研究開発法人農業・食品産業技術総合研究機構, 果樹茶業研究部門茶業研究領域, 主任研究員 (10391418)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | 一酸化二窒素 / 茶 / 土壌 / 一次反応式 / 物質動態モデル / ベイズ推定法 |
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| Outline of Final Research Achievements |
The objectives of this study are to clarify the effect of environmental factors on nitrous oxide (N2O) emissions from tea field soils and to construct a model to predict N2O emissions. We monitored N2O emissions from green tea field soils with high frequency using an automated gas sampling device. In addition, we modeled the N2O emissions using the Bayesian parameter estimation methods. The N2O fluxes from tea field soils were highly dependent on the inorganic nitrogen content and water content in soils. For the modeling of N2O emissions, the calculated N2O fluxes agreed well with the observed N2O fluxes. The contribution of nitrification to total N2O emissions were estimated to be greater than that of denitrification. The predicted N2O fluxes using by the estimated parameters agreed well with the N2O fluxes observed in the previous study, thus, we conclude that the estimated parameters are valid.
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Report
(4 results)
Research Products
(3 results)
