中文摘要：

利用田间试验研究了包膜控释尿素连续施用对玉米叶片叶绿素、千粒重、产量、养分吸收和肥料利用率的影响。结果显示,与普通尿素相比,包膜控释尿素在相同用量情况下,对玉米生长关键时期的叶片叶绿素含量、籽粒千粒重、产量有明显的促进作用;在小麦、玉米两季连续减少20%~40%用量情况下,玉米产量和各项生育指标没有明显下降;在60%8、0%和100%用量条件下,控释肥氮利用率分别提高9.35%、3.31%和3.81%。

英文摘要：

The investigation of the effects of coated-urea on the proportion of chlorophyll,thousand-grain weight,yield,nutrition absorption,and fertilizer usage efficiency was conducted in the field experiment.The results showed as follows.By comparison to conventional urea with the same rate of nitrogen,coated-urea had positive effects on the chlorophyll contents at the critical growth stage,as well as on the thousand-grain weights and grain yield.As the N application continually decreasing 20%-40% in the two growing seasons of wheat and corn,the grain yield and varied growing indexes did not decrease evidently.Under the rates of 60%,80% and 100% of conventionally applied nitrogen,the utilization efficiencies of controlled-release nitrogen fertilizer were increased by 9.35%,3.31% and 3.81%,respectively.