供氮水平对南粳9108群体质量和产量的影响  

Effect of Nitrogen Supply Level on Population Quality and Yield of Nanjing 9108

作　　者：李慧龙 宋晓华 段斌 鲁涛 刘秋员[3] LI Hui-long;SONG Xiao-hua;DUAN Bin;LU Tao;LIU Qiu-yuan(Xinyang Academy of Agricultuial Sciences,Xinyang 464000,China;Xinyang Agricultural Economic Management Guiding Station,Xinyang 464000,China;Xinyang Agriculture and Forestry University,Xinyang 464000,China)

机构地区：[1]信阳市农业科学院,河南信阳464000 [2]信阳市农业经济管理指导站,河南信阳464000 [3]信阳农林学院科研处,河南信阳464000

出　　处：《信阳农林学院学报》2019年第3期77-81,共5页Journal of Xinyang Agriculture and Forestry University

基　　金：国家重点研发计划子课题(2018YFD0200209);河南省科技攻关计划项目(172102110155);河南省重大科技专项(121100110200);大别山生物资源保护与利用学科群建设(306-30001)

摘　　要：设置了0、8、16、24 kg/667m^2 4个施氮水平,研究不同供氮水平对南粳9108群体质量和产量的影响,以期明确优质食味粳稻品种南粳9108在豫南地区适宜施氮量。试验结果表明,随着供氮水平的增加,有效穗数、每穗粒数、颖花数均呈升高趋势,而结实率和千粒重呈下降趋势,产量总体表现出先升高后降低的趋势,当施氮量为16 kg/667m^2时,产量最高,达到657.88 kg/667m^2。随着供氮水平提高,总叶面积指数、颖花/叶、粒数/叶、剑叶SPAD值、干物质积累量呈增加趋势,有效叶面积率、高效叶面积率和茎鞘物质输出量呈现先增加后降低的趋势,叶绿素含量衰减率、茎鞘物质输出率和茎鞘物质转换率呈降低趋势。总的来说,南粳9108在施氮量为16 kg/667m^2时,群体质量较好,产量较高。Four nitrogen application levels(0,8,16,24 kg/667 m^2)were set up to study the effects of different nitrogen supply levels on the population quality and yield of Nanjing 9108 in order to determine the suitable nitrogen application rate of high-quality and tasty japonica rice variety named Nanjing 9108 in southern Henan.The results showed that the number of effective panicles,grains per panicle and spikelets increased with the increase of nitrogen supply level,while the seed setting rate and 1000-grain weight decreased.The yield increased first and then decreased.When the nitrogen application rate was 16 kg/667 m^2,the yield was the highest,reaching 657.88 kg/667 m^2.With the increase of nitrogen supply level,the total leaf area index,spikelet/leaf,grain number/leaf,SPAD value of flag leaf and dry matter accumulation increased,while the effective leaf area efficiency,high leaf area efficiency and stem sheath material output increased first and then decreased.The chlorophyll content attenuation rate,stem sheath material output rate and stem sheath material conversion rate decreased.Generally,the population quality and yield of Nanjing 9108 were better when the nitrogen application rate is 16 kg/667 m^2.

关 键 词：氮肥 南粳9108 群体质量 产量 

分 类 号：S511[农业科学—作物学]