山西农业大学学报（自然科学版）2012，Vol.32Issue(6)：492-497,6.
控释肥料配施对冬小麦产量和氮肥利用的影响
Effects of Controlled Release Urea Combined with Conventional Urea on Grain Yield and Nitrogen Use Efficiency of Winter Wheat
摘要
Abstract
The field experiment was conducted by using a randomized complete block design to investigate the effects of different dosages coated controlled release urea(CRU) combined with conventional urea (U) used as basal application on the growth and development, grain yield, nitrogen uptake and utilization of winter wheat in this study. Five treatments were set, i.e. control (CK), 100% U (T1), 100% CRU (T2), 80% CRU + 20% U (T3), 60% CRU + 40% U (T4). The results showed that the 1000-grain weight, grain number per ear, harvest index and grain yield were significantly increased in the treatments of T3 and T4 compared with T1 treatment in the same N -application. The grain yield of winter wheat was increased by 7. 42% -13. 12%. Besides, in comparison with the T1 treatment, the amount of nitrogen accumulation in wheat grain was increased and the amount of residual nitrogen in vegetative organs was reduced at the mature stage in treatments T3 and T4. The nitrogen use efficiency were increased by 8. 37% ～ 14. 05% and the soil nitrogen dependency ratio was reduced by 7. 43% -11. 04% in these two treatments. Composite application of controlled-release urea and traditional urea could reduce fertilizer costs to some extent and improve the economic efficiency. In this study, the T4 treatment was recommended as the appropriate combination of controlled - release urea and traditional urea for the high grain yield, nitrogen use efficiency and maximum economic benefits.关键词
控释尿素/冬小麦/生长发育/产量/氮肥利用率Key words
Controlled -release urea/ Winter wheat/ Growth and development/ Grain yield/ Nitrogen use efficiency分类
农业科技引用本文复制引用
栗丽,洪坚平,王宏庭,谢英荷..控释肥料配施对冬小麦产量和氮肥利用的影响[J].山西农业大学学报（自然科学版）,2012,32(6):492-497,6.基金项目
国家"十一五"科技计划支撑项目(2008BADA4B07-1) （2008BADA4B07-1）
公益性行业(农业)科研专项经费项目(201303104) （农业）
山西农业大学科技创新基金项目(201229) （201229）
