中国农业大学学报2017，Vol.22Issue(12)：20-25,6.DOI:10.11841/j.issn.1007-4333.2017.12.03
施氮时期对糜子产量和氮素利用效率的影响
Effects of nitrogen application stage on the yield and nitrogen use efficiency of broomcorn millet
摘要
Abstract
Rational nitrogen use plays an important role in increasing the yield and nitrogen (N) efficiency of maize.Through the study of different proportion of nitrogen application rates for base fertilizer at jointing stage and anthesis stage could help managing N fertilizer application and improving N use efficiency.Taking Jinshu 9 as the studied material,base fertilizer,jointing stage fertilizer and anthesis stage fertilizer were applied in different proportions,with 6 treatments.The results showed that multiple nitrogen application was more beneficial to the yield increasing of millet than single nitrogen application.The yield of N4 (2 ∶ 4 ∶ 4) was the highest,which was 4 575.62 kg/hm2.Yield reached a significant positive correlation with grain weight per plant and plant height,the correlation coefficients were respectively 0.93 and 0.94;Nitrogen use efficiency,nitrogen agronomic efficiency and nitrogen partial factor productivity were the highest in N4 treatment,nitrogen use efficiency was 19.70％ higher than in N1 (base fertilizer 100％) and N2 (base fertilizer 50％,jointing fertilizer 50％) 1.31％,respectively;Nitrogen agronomic efficiency was 25.55％ and 23.64％ higher than N1 and N2,respectively;The nitrogen partial factor productivity was 8.72％ and 8.07％ higher than N1 and N2 respectively.So basal fertilizer (20％),the jointing stage (40％) and the anthesis stage (40％) could effectively improve the yield of broomcorn millet and the nitrogen fertilizer use efficiency.关键词
施氮时期/糜子/产量/氮素利用效率Key words
nitrogen application stages/broomcorn millet/yield/nitrogen use efficiency分类
农业科技引用本文复制引用
王君杰,曹晓宁,王海岗,陈凌,刘思辰,田翔,秦慧彬,杨光宗,乔治军..施氮时期对糜子产量和氮素利用效率的影响[J].中国农业大学学报,2017,22(12):20-25,6.基金项目
山西省农业科学院攻关项目(YGG1625) （YGG1625）
农业部国家谷子高梁产业技术体系项目(CARS-06-13S) （CARS-06-13S）
