不同氮肥运筹模式对杂交水稻川香9838物质生产及产量的影响  

Effects of Nitrogen Fertilizer Management on Dry Matter Production and Yield Formation in Hybrid Rice Cultivar Chuanxiang 9838

作　　者：姬广梅 罗德强 江学海 李敏 姜萍[2] 周维佳[3] 蒋静 

机构地区：[1]贵州省水稻研究所,贵州贵阳550006 [2]贵州省农业科技信息研究所,贵州贵阳550006 [3]贵州省农业科学院,贵州贵阳550006 [4]贵州省水利水电勘测设计研究院,贵州贵阳550002

出　　处：《贵州农业科学》2013年第11期18-21,共4页Guizhou Agricultural Sciences

基　　金：贵州省创新能力建设项目"贵州水稻育种;栽培与产业化创新能力建设"[黔科合院所创能合(2011)4003];贵州山区水稻科研基础条件建设项目"贵州山区水稻科研条件建设"[黔科条中补地(2011)4005];贵州省科技计划项目"杂交籼稻高产氮高效的协同及其机理研究"[黔科合NY字(2012)3043];贵州省科技成果重点推广计划项目"杂交水稻超高产精确栽培技术大面积示范推广"[黔科合成字(2012)5019];贵州省水稻遗传育种研究创新团队[黔科合人才团队(2012)4020];贵州省农业攻关项目"不同基因型水稻高产生理特性研究"[黔科合N字(2009)3014]

摘　　要：为明确不同氮肥运筹模式对杂交水稻川香9838物质生产及产量的影响,以杂交水稻品种川香9838为试材,设置3种施氮量(A1:7kg/667m2;A2:10kg/667m2;A3:13kg/667m2)和4种氮肥施用方式(底肥∶分蘖肥∶穗肥分别为:B1:7∶3∶0;B2:6∶0∶4;B3:8∶0∶2),研究不同氮肥运筹模式对川香9838茎蘖生长、物质积累及产量形成的影响。结果表明,随着施氮量增加,各生育时期的分蘖数增加,成穗率以A2>A1>A3,抽穗期和成熟期的干物质积累量均明显增加,收获指数以A2>A1>A3,产量则先升后降,以施氮量10kg/667m2时产量最高,平均为651.59kg/667m2。穗肥的施用能显著提高川香9838的产量,基蘖肥与穗肥的比例为6∶4时产量最高,施氮总量为7kg/667m2、10kg/667m2、13kg/667m2时产量分别为620.81kg/667m2、651.59kg/667m2、636.18kg/667m2,穗肥于幼穗分化3期施用为宜。To explore the effects of nitrogen fertilizer management on dry matter production and yield formation in hybrid rice cultivar Chuanxiang 9838,using the hybrid rice cultivar Chuanxiang 9838 as experimental material,the authors designed three kinds of N applications and four nitrogen management methods,to carry out the effects of different nitrogen fertilizer management patterns on stem tillers growth,dry matter accumulation and yield formation.Results：as N application rate increased,the tiller numbers per area at different growth stage increased,the rate of productive tillers were A2 〉 A1〉 A3,the dry matter accumulation at heading and maturing stage were significantly increased,harvest index were A2 〉 A1 〉A3,the yield first increased and then decreased,and reached the highest yield 651.59 kg/m^2 on average when the N application rate was 10 kg/667 m^2.Application of panicle fertilizer can significantly increase the yield,the highest yield came out when the ratio of basal and tiller fertilizer to panicle fertilizer was 6：4.The yield reached 620.81 kg/667m^2,651.59 kg/667m^2 and 636.18 kg/667m^2 respectively when N application amount was 7 kg/667m^2,10 kg/667m^2 and 13 kg/667m^2,and it was optimum to apply earing fertilizer in the third stage of panicle differentiation period.

关 键 词：水稻 氮肥运筹 物质生产 产量 

分 类 号：S511[农业科学—作物学]