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中文摘要：
通过田间试验,分析了常规施肥的麦茬稻与不施肥的大棚作物茬稻的产量、田面水氮素含量的差异和不同施氮肥期对大棚作物茬水稻的产量效应。结果表明：在水稻生育前期,常规施肥的麦茬稻田田面水总氮量为不施肥的大棚作物茬的6.02倍,水稻增产10.64%;前茬为大棚作物时,水稻全季不施基肥、仅在叶龄余数4或5时一次追肥（施氮量75 kg/hm^2）可比不施肥增产23%以上,此氮素管理模式有使大棚作物茬水稻增产和降低氮素面源污染的正向作用。
英文摘要：
Field experiments with rice were conducted to study the differences in rice yield and nitrogen content of paddy field surface water between the rice-wheat cropping under conventional fertilization and the greenhouse crop-rice cropping without fertilization and the effect of N fertilization stages on the rice yield in greenhouse crop-rice cropping pattern. The results showed that at the early stage of rice growth, the total nitrogen content of paddy field surface water in the rice-wheat cropping under conventional fertilization was 5.02 times greater than that in the greenhouse crop-rice cropping without fertilization,and the rice yield in the former cropping pattern was 10.64% higher than that in the latter cropping pattern. When one-time nitrogen dressing（75 kg/hm^2）was conducted at the leaf age remainder = 4 or 5,the rice yield in the greenhouse crop-rice cropping without basal dressing could increase by at least 23 % over that without fertilizer application. So the nitrogen application management had positive effects on increasing the rice yield in the greenhouse crop-rice cropping and decreasing non-point source pollution of nitrogen.
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