通过田间试验研究了控释尿素减量施用对春小麦的生长、产量效益及氮肥利用率的影响。结果表明，控释尿素减量10%～30%较普通尿素传统施肥(施N225.0 kg/hm2)小麦增产6.1%～11.9%，控释尿素全量处理与普通尿素传统施肥产量相当。用控释尿素处理的氮肥利用率施较普通尿素传统施肥高2.39～18.99百分点，其中以控释尿素减量30%最高。控释尿素全量及减量处理的纯收益较普通尿素处理增收102.6～3105.1元/hm2，以控释尿素减量20%处理纯收益最高。春小麦在控释尿素减量条件下能够实现节本增效，其中以控释尿素减量20%～30%施用效果最佳，可在春小麦生产中推广应用。

The effects of controlled-release urea reduction application on the growth， yield benefit and nitrogen use efficiency of spring wheat were studied by field experiments. The results showed that compared with conventional urea fertilization (N 225.0 kg/hm2)， controlled release urea decreased by 10% ~ 30%， and wheat increased by 6.1% ~ 11.9%. The nitrogen utilization rate of controlled-release urea treatment was 2.39 ~ 18.99 percent point higher than that of conventional urea fertilization， the reduction of controlled release urea by 30% was the highest. Compared with the normal urea treatment， the net profit of controlled release urea treatment was 102.6 ~ 3 105.1 yuan/hm2， and the net profit of controlled release urea treatment with 20% reduction was the highest. Under the condition of controlled release urea reduction， spring wheat can realize cost saving and efficiency increasing， among which 20% ~ 30% controlled release urea reduction has the best application effect， which can be popularized in spring wheat production.

S512.1；S147.2

甘肃省科技重大专项“抗逆高产小麦新品种选育及高效生产技术集成展示”(1203NKDF018)。