頁籤選單縮合
題名 | 臺灣地區水稻田全年度甲烷通量觀測--以臺中霧峰為例=Full-year Observation of Methane Flux at Paddy Fields in Taiwan |
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作者 | 馮浦捷; 鄭丞孝; 莊秉潔; 陳琦玲; 黃穎俊; 黨美齡; 郭珮萱; 蔡徵霖; 林卷樺; | 書刊名 | 大氣科學 |
卷期 | 43:3 2015.09[民104.09] |
頁次 | 頁221-232 |
分類號 | 434.111 |
關鍵詞 | 渦流協變法; 開放式甲烷分析儀; 甲烷通量; EC; LI-7700; Eddy covariance; Open path CH4 analyzer; Methane flux; |
語文 | 中文(Chinese) |
中文摘要 | 本研究以渦流協變系統(Eddy Covariance system, EC)搭配微氣象系統觀測全年度不同生長季節水稻田甲烷通量變化,探討各項氣象因子與甲烷通量的相關性。實驗場址選在台中霧峰農試所85號試驗田進行甲烷通量觀測,觀測期間分別為2012年2月至6月第一期作水稻、7月至10月第二期作水稻、2013年3月至6月第一期作水稻及稻作間之休耕期。結果顯示,各期水稻作甲烷通量最高值皆發生在水稻分蘗期間(約40~50天),2012年第一期作約在-1~13μg m^(-2)s^(-1),第二期作約在約在-2~17μg m^(-2)s^(-1),2013年第一期作約在-2~16μg m^(-2)s^(-1)。分蘗期過後,甲烷通量迅速減小約10倍,2012年第一期作約在-1.3~1.9μg m^(-2)s^(-1),第二期作約在-1.0~2.3μg m^(-2)s^(-1),2013年第一期作約在-1.2~0.5μg m^(-2)s^(-1),透過微氣象觀測與栽培過程顯示水稻田甲烷通量與土壤含水率及土溫具有高度相關性。 |
英文摘要 | In this study, we used eddy covariance system (EC) cooperated with micro-meteorological system to observe the methane fluxes in different growing season at the paddy fields for a year, and explored the relationship between the meteorological factors and the methane flux. The experimental site was on paddy fields (No.85) in Taiwan Agricultural Research Institute, Wu-Feng, Taichung. The experimental period included 3 cropping seasons: (1) February-June, 2012 (the 1^(st) cropping season of 2012), (2) July-October, 2012 (the 2nd cropping season of 2012), (3) March-June, 2013 (the 1^(st) cropping season of 2013). The results showed that the highest methane fluxes were occurred at the tillering stage (40 to 50 days after transplanting) in all measured cropping season. The fluxes were -1-13μg m^(-2) s^(-1) in the 1st cropping season of 2012, -2-17μg m^(-2) s^(-1) in the 2^(nd) cropping season of 2012, and -2-16μg m^(-2) s^(-1) in the 1^(st) cropping season of 2013. After the tillering stage, the methane flux decreased quickly to 0.1 times that at the tillering stage. The methane fluxes were -1.3-1.9 μg m^(-2) s^(-1) in the 1st cropping season of 2012, -1.0-2.3μg m^(-2) s^(-1) in the 2^(nd) cropping season of 2012, and -1.2-0.5μg m^(-2) s^(-1) in the 1^(st) cropping season of 2013. From the micrometeorological observations, the methane flux was found to be correlated with soil moisture and soil temperature. More studies have to been conducted to figure out the relationships in the future. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。