密度对玉米干物质积累、光合特性和产量的影响  

Effects of Plant Density on Drymatter Accumulation,Photosynthetic Characters and Yield in Maize

作　　者：史磊[1] 王延波[1] 李明[1] 徐亮[1] 赵海岩[1] 

机构地区：[1]辽宁省农业科学院玉米所,辽宁沈阳110161

出　　处：《辽宁农业科学》2015年第3期1-5,共5页Liaoning Agricultural Sciences

基　　金：国家玉米产业技术体系(nycytx-02);国家科技支撑计划(2011BAD16B12;2012BAD04B03;2013BAD07B03)

摘　　要：以早熟矮秆耐密品种辽单565为试材,研究了在较高种植密度下继续增加密度对玉米干物质积累、光合特性和产量的影响。结果表明,随着密度的增大,单株干物质地上和地下部分均下降;叶面积指数先升后降,82 500株/hm2处理下最高;单株功能叶片光合速率和叶绿素含量递减。测产结果表明,82 500株/hm2处理下产量最高,达14 364.0 kg/hm2;穗长、穗粗、穗粒数、穗粒重、百粒重、出籽率与产量呈正相关,秃尖长与产量呈负相关。Used Liaodan 565 as the experimental material,effects of plant density on dry matter accumula-tion,photosynthetic characters and yield in maize were studied.The results indicated thatwith the density in-creased,ground and underground parts of dry matter were both to decline,LAI fell after rose,which was the largest in 82 500 plants /hm2 ,Pn and SPAD tended to decrease.Results of yield data showed that the optimal density of Liaodan565 was 82 500 plants /hm2 ,and the max yield was 14 364.0 kg /hm2 .There was a positive correlation between the yield and ear length,ear diameter,grains per spike,grain ear weight,100-seeds weight,seed yield percentage.There was a negative correlation between the yield and bare top length.

关 键 词：玉米 密度 干物质积累 光合特性 产量 

分 类 号：S513.01[农业科学—作物学]