在靖远县北滩乡井滩村布设大田试验，测定了3种肥料、6个施肥处理对玉米生长及土壤无机态氮浓度的影响。结果表明，在施氮量相同的情况下，与常规施肥和施入等氮硫酸铵相比，施用增效氮肥可使玉米生育期延长4 d，折合产量较常规施肥和施入等氮硫酸铵分别提高10.71%、13.18%，分别增收3 138.74、3 780.74元/hm2，收益率为10.71%、13.18%。室内测定的不同肥料对土壤无机态氮浓度的影响结果表明，施用增效氮肥可延长肥效20～30 d，提高肥料利用率10%以上。

Though field experiment， 6 treatments using 3 kinds of fertilizers setted to explore the effects on maize growth in Jingyuan North Beach country of Gansu . The results showed that efficiency nitrogen fertilizer treatment can increase maize growing 4 days than others， increased yield 10.71% and 13.18%， increased income 3 138.74 yuan/hm2 and 3 80.74 yuan/hm2 than conventional fertilization and nitrogen ammonium sulfate treatments . In addition， indoor measurement of the effect of different fertilizer on soil inorganic nitrogen concentration results show that the efficiency of nitrogen fertilizer applied can be applied to extend 20 ~ 30 d, improve the utilization rate of fertilizer by more than 10% .

S513；S643.3