Greenhouse gas emissions and global warming potential of traditional and diversified tropical rice rotation systems
Greenhouse gas emissions and global warming potential of traditional and diversified tropical rice rotation systems
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DOI：
10.1111/gcb.13099
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发表时间：
2016-01-01
影响因子：
11.6
通讯作者：
Kiese, Ralf
中科院分区：
文献类型：
--
作者：
Weller, Sebastian;Janz, Baldur;Kiese, Ralf
全球水稻农业将日益受到水资源短缺的挑战，同时需求的变化（例如饮食的变化或对生物燃料的需求增加）将反馈到农业实践中。这些因素正在改变传统的种植模式，从双季稻种植转向旱季种植旱地作物。为了全面评估温室气体 (GHG) 平衡，我们测量了 2.5 年双季稻 (R-R) 和旱地种植中玉米 (R-M) 或好氧稻 (R-A) 多样化水稻轮作的甲烷 (CH4)/一氧化二氮 (N2O) 排放量和农艺参数。旱季引入旱地作物可分别减少灌溉用水量和甲烷排放量 66-81% 和 95-99%。此外，对于包括旱地作物在内的耕作方式，随后水稻雨季的 CH4 排放量减少了 54-60%。尽管在多样化的系统中，年 N2O 排放量增加了两到三倍，但 CH4 的大幅减少导致了显着降低（P
Global rice agriculture will be increasingly challenged by water scarcity, while at the same time changes in demand (e.g. changes in diets or increasing demand for biofuels) will feed back on agricultural practices. These factors are changing traditional cropping patterns from double-rice cropping to the introduction of upland crops in the dry season. For a comprehensive assessment of greenhouse gas (GHG) balances, we measured methane (CH4)/nitrous oxide (N2O) emissions and agronomic parameters over 2.5years in double-rice cropping (R-R) and paddy rice rotations diversified with either maize (R-M) or aerobic rice (R-A) in upland cultivation. Introduction of upland crops in the dry season reduced irrigation water use and CH4 emissions by 66-81% and 95-99%, respectively. Moreover, for practices including upland crops, CH4 emissions in the subsequent wet season with paddy rice were reduced by 54-60%. Although annual N2O emissions increased two- to threefold in the diversified systems, the strong reduction in CH4 led to a significantly lower (P