植物营养与肥料学报2011，Vol.17Issue(4)：852-860,9.
施氮量对超高产夏玉米产量及氮素吸收利用的影响
Effects of nitrogen application on yield and nitrogen use efficiency of summer maize under super-high yield conditions
摘要
Abstract
The effects of nitrogen application rates on grain yield,nitrogen translocation and use efficiency under super-high yield conditions were studied in fields.Two cultivars of summer maize（Zea mays L.）,Denghai 661（DH661） and Zhengdan 958（ZD958） were selected as experimental materials.The results show that the grain yield,amount of total nitrogen accumulation in plant and nitrogen recovery efficiency are increased at first,and then decreased with the increase of nitrogen application rates.The grain yields of DH661 and ZD958 reach to 12172-15080 kg/ha and 12011-15360 kg/ha under nitrogen fertilizer application rate of N 240-360 kg/ha.Under those nitrogen fertilizer application rates,nitrogen recovery efficiency and nitrogen agronomic efficiency of DH661 are 10.6%-23.1% and 11.5%-13.6%,and are 24.1%-28.6% and 9.5%-11.4% for ZD958.For the two summer maize cultivars,total nitrogen accumulation and nitrogen recovery efficiency are the highest under nitrogen fertilizer application rates of N 240-360 kg/ha.Under those nitrogen fertilizer application rates,translocation efficiency and nitrogen contribution proportion of DH661 and ZD958 after the anthesis stage could be regulated effectively.As a result,nitrogen in grain and grain yield are improved.In conclusion,under this field experiment conditions,as far as grain yield and nitrogen use efficiency are concerned,the most optimal nitrogen fertilizer rates are N 240-360 kg/ha.关键词
夏玉米/施氮量/产量/氮素利用Key words
summer maize/nitrogen application rate/yield/nitrogen utilization分类
农业科技引用本文复制引用
吕鹏,张吉旺,刘伟,杨今胜,苏凯,刘鹏,董树亭,李登海..施氮量对超高产夏玉米产量及氮素吸收利用的影响[J].植物营养与肥料学报,2011,17(4):852-860,9.基金项目
国家重点基础研究发展计划项目 （）
公益性行业（农业）科研专项 （）
国家“十二五”科技支撑计划项目（2011BAD16B09）资助 （）
