植物营养与肥料学报2012，Vol.18Issue(6)：1343-1353,11.
施氮量和种植密度对高产夏玉米产量和氮素利用效率的影响
Effects of nitrogen rate and planting density on grain yield and nitrogen utilization efficiency of high yield summer maize
摘要
Abstract
Two summer maize cultivars, DH661 and ZD958, were used as experiment materials to study the effects of different nitrogen rates (N0 kg/ha, 120 kg/ha, 240 kg/ha and 360 kg/ha) and planting densities (60000 plant/ha, 75000 plant/ha, and 90000 plant/ha) on yield and nitrogen use efficiency of summer maize under the field condition. The results show that compared with the 60000 plant/ha, the increase of nitrogen rate could increase the dry matter accumulation amount per plant, biomass, grain yield, total nitrogen accumulation, nitrogen transition rate and nitrogen transition efficiency of maize. The contribution proportion of nitrogen is increased with the increase of the nitrogen rate, while the nitrogen partial factor productivity, nitrogen agronomy efficiency and nitrogen recovery efficiency are decreased. In conclusion, under this experimental field condition, the increase of the nitrogen rate could improve grain yield, nitrogen use efficiency in higher planting density. As far as the grain yield and nitrogen efficiency are concerned, the most optimal plant density and nitrogen rate are both 90000 plant/ha and N 240-360 kg/ha, respectively.关键词
高产夏玉米/施氮量/种植密度/产量/氮素利用率Key words
high-yield summer maize/nitrogen rate/planting density/grain yield/nitrogen utilization efficiency分类
农业科技引用本文复制引用
曹胜彪,张吉旺,董树亭,刘鹏,赵斌,杨今胜..施氮量和种植密度对高产夏玉米产量和氮素利用效率的影响[J].植物营养与肥料学报,2012,18(6):1343-1353,11.基金项目
国家自然科学基金项目 （）
山东省现代农业产业技术体系 （）
公益性行业（农业）科研专项 （）
山东省玉米育种与栽培技术企业重点实验室开放课题资助. （）
