核农学报2018，Vol.32Issue(1)：157-164,8.DOI:10.11869/j.issn.100-8551.2018.01.0157
控释尿素对小麦籽粒产量和氮素利用率的影响
Effects of Controlled Release Urea on Grain Yield and Nitrogen Use Efficiency in Wheat
摘要
Abstract
In order to explore the optimum proportion of urea with controlled release urea in high-yield and high-quality production of wheat,wheat 836 was used as test material,a field fertilization experiment including six treatments (0,10％,20％,40％,80％ and 100％)with different ratio of controlled release urea (CRU) were performed to investigate the effects of CRU on grain yield,dry matter accumulation and distribution,N uptake and nitrogen use efficiency of the wheat.The results showed that CRU application can significantly increase flag leaf length and area at maturity and dry matter accumulation and nitrogen accumulation in shoot after tillering stage.The treatment of 40％ CRU (N4) possessed the highest integrated synergic.Nitrogen use efficiency was significantly increased by 20％ over CRU addition treatments especially in N4 treatment where the nitrogen partial factor productivity (NPEP),nitrogen agronomy efficiency (NAE) and nitrogen recovery efficiency(NRE) increased by 14.21％,27.26％ and 29.85％,respectively.With the increase of CRU addition proportion,the grain yield of wheat firstly increased and then gradually decreased.The highest grain yield was observed under CRU addition of 40％ treatment,which was increased by 14.23％ compared to the control treatment.Therefore,a basic application of 60％ urea and 40％ CRU were in favor of increasing grain yield,dry matter accumulation and nitrogen use efficiency.To some extent,the fertilizing method could save the input of time and labor and promote as efficient simplified fertilization technology in wheat planting.The findings will be helpful to optimize the N fertilization for the agricultural practices of wheat.关键词
小麦/控释尿素/产量/干物质积累/氮素利用率Key words
wheat/controlled release urea/yield/dry matter accumulation/nitrogen use efficiency引用本文复制引用
梁靖越,张敬昇,王昌全,李冰,向毫,尹斌,罗晶..控释尿素对小麦籽粒产量和氮素利用率的影响[J].核农学报,2018,32(1):157-164,8.基金项目
国家科技支撑计划项目(2013BAD07B13),四川省科技支撑计划项目(2012JZ0003) （2013BAD07B13）
