硫包衣尿素在夏玉米上的应用效果研究

为了解硫包衣尿素在夏玉米上的应用效果,充分的发挥肥料作用,通过田间试验,研究了硫包衣尿素和普通尿素不同用量、不同施肥方法(普通尿素为基肥+1次追肥;硫包衣尿素为一次性基施)对夏玉米出生长、产量、氮肥表观利用效率等的影响。结果表明:硫包衣尿素以等氮量或减量30%采取一次性施肥的方式,夏玉米的生长和产量与普通尿素当地习惯施肥无显著差异,其产量分别达到了10789.17kg/hm2、10595.11kg/hm2;在夏玉米上应用硫包衣尿素可显著提高肥料的利用效率和农学效率,其中硫包衣尿素减量30%处理氮肥表观利用率和生产率分别达到了42.59%和20.74kg/kg。硫包衣尿素以一次性基施的施肥方式替代普通尿素基肥加追肥是可行的,能达到省工、节肥、增效的目的。

Study on Effects of Sulfur Coated Urea on Summer Maize

Aimed to know effect of sulfur coated urea（SCU） on summer maize and improve N utilization efficiency,field experiment was conducted to study the effect of sulfur coated urea and urea under different dose and applied methods on the growth and yield of summer maize.Two urea treatments were applied in conventional way （basal dressing plus once topdressing） with nitrogen application rate of 180 kg/hm 2 （CK180,custom dose） and 126 kg/hm 2 （CK126） respectively,while sulfur coated urea treatment （PCU） was applied by basal application with nitrogen application rate of 180 kg/hm 2 （SCU180）,126 kg/hm 2 （SCU126） and 90 kg/hm 2 （SCU90） respectively.The results showed that there were no significant differences in grow and yield among the treatments of SCU180,SCU126 and CK180.The yield of SCU180 and SCU126 were 10789.17 kg/hm 2 and 10595.11 kg/hm 2 respectively.Applying SCU on summer maize could significant improve N utilization efficiency and N production rate.N utilization efficiency and N production rate of treatment of SCU126 was 42.59% and 20.74 kg/kg respectively.Therefore,it can be speculated that SCU can be used by single basal application to summer maize production system,that help to change twice fertilization （basal and dressing） to one fertilization （basal）,and thus benefit to labor-saving,fertilizer-saving and profit-increasing.