核农学报2017，Vol.31Issue(5)：954-963,10.DOI:10.11869/j.issn.100-8551.2017.05.0954
氮肥底追比例及施硫对小麦氮素吸收利用的调控
Effect of Nitrogen Fertilizer Ratio of Base and Topdressing and Sulfur on Nitrogen Absorption and Utilization in Wheat
摘要
Abstract
Reasonable sulfur rate and nitrogen fertilizer ratio of base and topdressing can adjust the nitrogen absorption and translocation,which can provide the theory basis of nitrogen application.A pot experiment and 15N tracer technique were carried out to study the effect of sulfur rate and nitrogen fertilizer ratio of base and topdressing on nitrogen accumulation and its proportion from different sources at anthesis and maturity,and analyze their difference of absorption and transport of nitrogen,nitrogen fertilizer productive efficiency in Jingdong8 and Jimai20.There were three nitrogen fertilizer ratio of base and topdressing including 3∶ 7,5∶5 and 7∶ 3,which were marked N1,N2 and N3,respectively.And two sulfur rate were designed at 0 and 45 kg·ha-1,which were marked S0 and S1,respectively.The results showed that nitrogen from fertilizer were the main source in two cultivar,and the proportion were 60％ ～70％ for Jingdong8 and 70％ ～80％ for Jimai20.There were differences in nitrogen absorption and transport of two cultivar under different sulfur rate and nitrogen fertilizer ratio of base and topdressing.For Jingdong8,nitrogen accumulation in grain at maturity,nitrogen translation from vegetative organs to grain,grain yield and nitrogen use efficiency were higher in the treatment of N1S0 than other treatments.For Jimai20,nitrogen accumulation in grain at maturity,grain yield and nitrogen use efficiency were higher in the treatment at N3S1,but nitrogen translation from vegetative organs to grain were higher at the treatment N1S0 than other treatments.To sum up,when the nitrogen fertilizer ratio of base and topdressing was 3∶ 7,the nitrogen translation from vegetative organs to grain,protein content and nitrogen recovery index were the highest,and the grain yield and nitrogen productive efficiency were the highest in 7∶ 3.The most suitable fertilizer treatment of increasing yield,NPE and NUE for Jingdong8 was N1S0,but N3S1 for Jimai20.These findings provide a theoretical reference for reasonable fertilizer in winter wheat field production management.关键词
冬小麦/氮肥底追比例/硫肥/氮素吸收/氮素利用Key words
winter wheat/nitrogen fertilizer ratio of base and topdressing/sulfur/nitrogen absorption/nitrogen utilization引用本文复制引用
王美,赵广才,石书兵,常旭虹,王德梅,杨玉双,郭明明,张红,张兴卫..氮肥底追比例及施硫对小麦氮素吸收利用的调控[J].核农学报,2017,31(5):954-963,10.基金项目
国家现代农业小麦产业技术体系(CARS-3-1-26) （CARS-3-1-26）
