氮肥追施方式对机插杂交中籼稻群体质量及产量形成的影响  

Effects of nitrogen topdressing on population quality and yield formation of machine transplanted middle-season indica hybrid rice

作　　者：陈刚[1] 吴文革[1] 孙如银[2] 许有尊[1] 周永进[1] 

机构地区：[1]安徽省农业科学院水稻研究所,安徽合肥230031 [2]安徽省天长市农业科技推广中心,安徽天长239300

出　　处：《中国土壤与肥料》2015年第2期78-82,共5页Soil and Fertilizer Sciences in China

基　　金：国家科技支撑计划(2011BAD16B06-3;2013BAD07B08;2012BAD04B09-2);院长青年创新基金项目(13B0116)

摘　　要：通过田间机插试验,在施氮量及其基追比相同的条件下,设置6种不同的分蘖肥和穗肥施用方法,研究不同的追肥方式对杂交中籼水稻机插群体质量和产量形成的影响。结果表明,氮肥作为分蘖肥分次追施对机插杂交中籼稻的群体质量和产量的影响比穗肥的作用明显;在机插后5-7 d和12-15 d分两次追施氮肥作为分蘖肥能够显著提高群体茎蘖成穗率、抽穗期群体叶面积指数和粒叶比,促进抽穗后干物质生产、积累与分配,提高收获指数,优化产量结构,提高机插杂交中籼水稻的产量。6 N fertilizer application methods in tillering stage and booting stage were settled to study the effects of topdressing on population quality and yield formation of machine transplanted middle-season indica hybrid rice under the same fertilizer a-mount and percentage by field experiment. The results showed that the topdressing N fertilizer in tillering stage was more impor-tant than the booting stage in building the high yield and better population quality. N fertilizer application in 5 to 7 days and 12 - 15 days after the machine transplanting at the tillering stage could improve population ear-bearing tiller percent obviously, increase the LAI of booting stage and grain-leaf ratio, improve the dry matter accumulation and distribution of the production after booting stage, increase the harvest index, optimize the structure of population and improve the machine in the plug-in hybrid indica rice production.

关 键 词：氮肥 机插 中籼稻 群体质量 产量 

分 类 号：S511.21[农业科学—作物学]