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標題: 提升水分生產力與氮肥利用效率及降低甲烷釋放量的水稻栽培整合技術
Integrated approaches for increasing water productivity and nitrogen utilization, and reducing methane emissions in irrigated rice
作者: 陳宗禮
關鍵字: 技術發展;water-saving irrigation;農藝;節水栽培;水稻;肥料利用效率;甲烷排放;水分生產力;rice;fertilizer use efficiency;methane emissions;water productivity
Rice (Oryza sativa L.) is one of the most important staples in the world. Seventy five percent of the world's rice is grown under flooded, or submerged conditions, it is also one of the biggest users of the world's developed freshwater resources. Water for agriculture, especially for irrigated rice production, is becoming increasingly scarce due to greater urban, domestic and industrial demand. Our challenge is to develop novel technologies and production systems that allow rice production to be maintained or increased in the face of declining water availability. Flooding of the soil is a prerequisite for sustained emissions of methane. Adequate drainage and water-saving irrigation greatly reduce methane emissions. Furthermore, it is not known how water-saving irrigation modifies nutrient use efficiencies and if it requires different N-fertilizer management compared with continuous flooding. This study was conducted to quantify and compare rice growth, yield, and methane emissions and water productivity under the commonly practiced water-saving irrigation and continuous flooding in typical irrigated rice environments in Taiwan. The comparison was carried out under different N-fertilizer management regimes to identify possible water by nitrogen interactive effects on nutrient uptake, nutrient-use efficiencies, and whether N-fertilizer management needs to be modified to fit the water regimes of water-saving irrigation compared with those of continuous flooding.

其他識別: 101農科-9.2.1-糧-Z1(5)
Appears in Collections:農藝學系

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