中文摘要：

应用土柱模拟试验的方法,研究了在高肥力菜田土壤条件下,施用几种新型氮肥对两茬叶菜硝酸盐积累和土壤硝态氮淋洗的影响。结果表明,在高肥力菜田土壤上,施用几种新型氮肥都未能明显提高第一茬油菜的生物量,硫硝铵（A SN）却降低了生物量,而第二茬菠菜不施肥处理生物量下降。尿素＋硝化抑制剂DM PP（En tec46）、尿素＋硝化抑制剂DCD（U＋DCD）和有机无机复混肥（OIF）3种氮肥显著降低了油菜硝酸盐含量。尿素＋玉米秸秆（U＋M S）和硫硝铵＋硝化抑制剂DM PP（En tec26）减少了土壤NO3^--N的向下淋洗,而尿素＋保水剂（U＋SAP）增加土壤NO3^--N的向下淋洗。

英文摘要：

Studies on effect of applying several new type nitrogen fertilizer on nitrate accumulation In two-reap leafy vegetable and soil nitrate leaching in high fertility vegetable by earth column-simulation experiment method. Results showed that, in high fertility vegetable soil, applying several new type nitrogenous fertilizers couldn＇t increased the first reap rape biomass and ammonium sulphate nitrate （ASN） decreased biomass, but the second reap spinach＇s biomass decreased in no fertilizer treatment. Urea ＋nitrification inhibitor DMPP （Entec46）, Urea＋nitrification inhibitor DCD （U＋DCD） and organic-inorganic fertilizer （OIF） decreased significantly nitrate content of rape. The urea ＋ maize straw （U＋MS） and ammonium sulphate nitrate ＋ nitrification inhibitor DMPP （Entee26） reduced soil nitrate nitrogen leaching, while urea ＋super absorbent polymers（U-t-SAP） increased soil nitrate leaching.