水稻連作與綠肥輪作制度下甲烷氣體之釋放及減量研究

甲烷是一重要的溫室氣體，水稻栽培是農業耕作體系中甲烷釋放的一重要途徑。本研究之目的乃是比較台灣現行輪作制度下水稻田土壤甲烷釋放之影響，2003年進行綠肥輪作水稻田與連作水稻田之田間實測調查。調查資料顯示綠肥輪作處理一期作水稻生長期甲烷釋放係數為10.4±4.1 g m^(-2) season^(-1)，而連作處理一期作水稻生長期甲烷釋放係數為13.9±3.7 g m^(-2) season^(-1)。綠肥輪作處理二期作水稻生長期甲烷釋放係數為5.2±1.4 g m^(-2) season^(-1)。連作處理二期作水稻生長期甲烷釋放係數為15.5±6.0 g m^(-2) season^(-1)。調查結果顯示，不論一期作或二期作水稻田之甲烷釋出量其連作處理者均遠高於綠肥輪作處理。因此，為降低水田耕作釋放之溫室氣體，且在可節約水資源及維持土壤地力的前題下，由試驗結果可建議輪作一個期作綠肥後再行水稻栽培，不僅可節約水資源及維持土壤地力並可大量降低甲烷之釋放，減低對環境之衝擊。

關鍵字

輪作制度；水稻田；甲烷釋放；減量

並列摘要

Methane is an important greenhouse gas, and flooded rice fields are one of the major biogenic methane sources. In this study, methane emission rates were measured after transplanting in paddy fields with treatment of rest and continuous rice cultivation. The experiment was conducted in fields located at Tainan District Agricultural Improvement Station in Chia-Yi county (23°25'08”N, 120°16'26”E) of southern Taiwan throughout the first and the second crop seasons in 2003. The seasonal methane flux in the first crop season were 10.4±4.1 and 13.9±3.7 g m^(-2) season^(-1) with the rotation-cultivation and continuous-cultivation treatments, respectively. The seasonal methane flux in the second crop season were 5.2±1.4 and 15.5±6.0 g m^(-2) season^(-1) with the rotation-cultivation and continuous-cultivation treatments, respectively. In comparison of two cultivation systems, the continuous cultivation system showed a tendency for larger methane emission than the rotation cultivation system. It was concluded that the CH4 emission was markedly decreased by rotation cultivation system, rotation cultivation system would be an appropriate methane mitigation strategy in Taiwan paddy soils.

並列關鍵字

Rotation system ； Paddy soils ； Methane emission ； Mitigation

被引用紀錄

蘇珮甄（2008）。台灣地區溫室氣體排放量預測與減量策略〔碩士論文，崑山科技大學〕。華藝線上圖書館。https://doi.org/10.6828/KSU.2008.00054

國際替代計量

水稻連作與綠肥輪作制度下甲烷氣體之釋放及減量研究

全文下載

主題瀏覽