【摘要】 通过测坑试验,研究了麦田渗漏水中氮素的变化动态和流失规律。结果表明,冬小麦田渗漏水中氮素以NO3--N为主,NO3--N作为氮素在土壤中流失的主要形态将成为施用氮肥造成地下水污染的重要来源;施用精制有机肥代替部分化学氮肥有利于减少麦田渗漏水中氮素的淋失,施用腐熟的粗猪粪没有这种效果。更多还原

【Abstract】 Based on the testing- hole experiment, the transformation process, rule of nitrogen leakage loss in the leaching water of the winter wheat field were studied. The result showed that the loss of - N was the main part of the nitrogen loss in leaching water in the winter wheat field. As the main form of nitrogen leakage loss in soil, - N would be an important groundwater pollution source after fertilizer application. Application of refined organic fertilizer could decrease the pollution of nitrogen to the environment, while no effect was observed in piggery excreta.更多还原