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%。 Field experiments were conducted to study the effects of continuous application of coated controlled-release urea on chlorophyll, 1000-grain weight, yield, nutrient uptake and fertilizer utilization rate in maize leaves. The results showed that compared with ordinary urea, the controlled release urea coated urea significantly promoted the leaf chlorophyll content, 1000-grain weight and yield in the same period of corn growth. In wheat and maize continuously decreased by 20% Under the conditions of 60%, 8% and 100%, the utilization rate of controlled release fertilizer increased by 9.35%, 3.31% and 3.81%, respectively.