Effects of Plant Density and Nitrogen Application Rate on Grain Yield and Nitrogen Uptake of Super H

来源 :Rice Science | 被引量 : 0次 | 上传用户:jack332904910
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The nitrogen uptake,yield and its components for two super-high-yielding hybrid rice combinations,Guodao 6 and Eryou 7954 were investigated under different plant densities(15,18,and 21 plants/m2) and different nitrogen application rates(120,150,180,and 210 kg/hm 2 ) .The experiment was conducted on loam soil during 2004-2006 at the experimental farm of the China National Rice Research Institute in Hangzhou,China.In these years,the two hybrid rice clearly showed higher yield at a plant density of 15 plants/m2with a nitrogen application rate of 180 kg/hm 2.Guodao 6 produced an average grain yield of 10 215.6 kg/hm 2 across the three years,while the yield of Eryou 7954 was 9 633.0 kg/hm 2 .With fewer plants per unit-area and larger plants in the plots,the two hybrid rice produced more panicles per plant in three years.The highest nitrogen uptake of the two hybrid rice was at a plant density of 15 plants/m2with a nitrogen application rate of 180 kg/hm 2. Further increasing nitrogen application rate was not advantageous for nitrogen uptake in super-high-yielding rice under the same plant density. The nitrogen uptake, yield and its components for two super-high-yielding hybrid rice combinations, Guodao 6 and Eryou 7954 were investigated under different plant densities (15, 18 and 21 plants / m2) and different nitrogen application rates (120, 150, 180, and 210 kg / hm 2). The experiment was conducted on loam soil during 2004-2006 at the experimental farm of the China National Rice Research Institute in Hangzhou, China. These years, the two hybrid rice clearly showed higher yield at a plant density of 15 plants / m 2 with a nitrogen application rate of 180 kg / hm 2.Guodao 6 produced an average grain yield of 10 215.6 kg / hm 2 across the three years, while the yield of Eryou 7954 was 9 633.0 kg / hm 2 .With fewer plants per unit-area and larger plants in the plots, the two hybrid rice produced more panicles per plant in three years. the highest nitrogen uptake of the two hybrid rice was at a plant density of 15 plants / m2with a nitrogen application rate of 180 kg / hm 2. Further increasing nitrogen applica tion rate was not advantageous for nitrogen uptake in super-high-yielding rice under the same plant density.
其他文献
摘要:随着经济全球化的发展,国家“一带一路”倡议的实行,公共卫生与预防医学已成为“一带一路”沿线国家留学生来华留学的热门专业,这些学生的医学教育是我国医学院校面临的新挑战,而流行病学的全英文教学更有其自身的特点。如果不对这部分学生群体的特点进行充分研究分析而仍沿用原有的针对中国学生的授课思维,那么必然会使授课内容乏味,留学生的学习兴趣低下,影响到该课程的学习效果。作者就个人在留学生流行病学理论授课
主编观点:创新是企业发展的源泉和不懈动力,奉化市为加快推进产业结构调整,转变经济发展方式,深入实施科技强市战略,以提升企业自主创新能力为核心,积极谋划新举措,不断加大科
第一部分严重胸腰椎三柱损伤两种内固定术数字三维可视化模型的建立 目的: 胸腰椎爆裂性骨折节段(T12-L2)后路270°减压重建内固定术,以及前后路联合减压重建内固定术的
目的:通过临床调查和形态学分析,探讨子宫腺肌病患者在位子宫内膜中神经含量(包括总神经、交感神经、副交感神经、新生神经)及其与痛经的相关性,并分析血管含量及其与月经量的相关
目的:前瞻性分析18FDG-PET/CT在NSCLC患者短时期小剂量化疗治疗前后的监测作用,研究PET/CT 扫描所得的SUV值及其改变与NSCLC化疗疗效和预后的相关性,为PET监测在短期内/化疗初
起初的时候,我认为钢文化是阳刚的.铜矿石质地坚硬,深埋地下历经悠久岁月而不腐 不朽;采矿时古有“炉火照天地,红星乱紫烟.郝郎明月夜,歌曲动寒川”之场面,今时各 种用途的矿
期刊
来源于遗传多样性的变异将有助于提高育种效率,通过血缘关系分析可以了解后代群体的遗传结构。研究的目的是评估美国俄亥俄州立大学大豆育种程序中对产量改良起过重大贡献的
移动学习是近年来迅速发展起来的一种新型学习模式,文章首先介绍了移动学习的相关概念和技术模型,然后以《多媒体技术》课程为例提出搭建移动学习平台的设想,分析了移动学习平台的需求性,针对需求性设计了以手机作为终端的移动学习平台的系统架构与功能模块,最后通过页面设计和编写程序实现了面向智能手机的移动学习平台.
“个性化阅读”是在新课标精神下生成的一种新的阅读理念,作为对传统的“独白式”阅读教学弊端的一种反驳,它确认了学生在阅读中的主体地位,使学生的个性在阅读中充分张扬.但