通过15N示踪研究不同沸石水平处理对玉米氮肥利用率的影响。结果表明 :( 1 )沸石和肥料混合使用促进了玉米的生长 ,第一茬玉米氮肥利用率以 0 7g kg土沸石用量为最高 ,其次是 1g kg土 ;( 2 )第二茬玉米的氮肥利用率则是以 0 1 %的沸石用量最高 ,其次是 0 1 3 %的沸石用量水平 ,与对照相比 ,沸石处理使两茬玉米的氮肥利用率分别提高了 2 3 2 %～ 3 3 1 % ;( 3 )沸石处理可以显著降低土壤中氮肥的损失 ,与对照相比 ,降低率达 2 5 9%～3 0 6% ,但对土壤中氮肥的残留量没有影响 Effects of Different Zeolite Levels on N Use Efficiency of Maize were Studied by 15N Tracing. The results showed that: (1) The mixed use of zeolite and fertilizers promoted the growth of maize. The nitrogen utilization rate of corn in the first crop was the highest with 0 7g kg soil zeolite, followed by 1g kg soil; (2) The rate of 0 1% zeolite was the highest, followed by 0 1 3% zeolite dosage. Compared with the control, zeolite treatment increased the nitrogen use efficiency of two crop corn by 232-331% ; (3) zeolite treatment can significantly reduce the loss of nitrogen in soil, compared with the control, the reduction rate of 259% ~ 306%, but no effect on the residual nitrogen in soil