密度对不同株型玉米光合特性及产量的影响  

Effects of Plant Density on Photosynthetic Characters and Yield of Different Plant Types Corn

作　　者：胡萌[1] 魏湜[1] 杨猛[2] 矫海波[1] 魏玲[1] 王燚[1] 吉彪[1] 

机构地区：[1]东北农业大学农学院,哈尔滨150030 [2]哈尔滨市农业科学院,哈尔滨150070

出　　处：《玉米科学》2010年第1期103-107,共5页Journal of Maize Sciences

基　　金：国家科技支撑计划(2006BAD02A11);黑龙江省攻关项目(GA07B101A8)

摘　　要：对不同密度条件下3个不同株型春玉米的光合特性及产量进行了研究。结果表明,随密度增加叶面积指数(LAI)、初始荧光(F0)上升,单株功能叶片光合速率(Pn)、PSⅡ的潜在活性(Fv/F0)、PSⅡ最大光化学量子产量(Fv/Fm)下降;产量构成因素表现为单位面积有效穗数先上升后下降,穗粒数下降,百粒重变化因品种而异。先玉335、金玉4号和吉农大302最高产量分别为9 638.45、8 523.94、8 330.92 kg/hm2;先玉335最适播种密度为75 000株/hm2,吉农大302为60 000～67 500株/hm2,金玉4号为45 000株/hm2。先玉335群体产量与LAI、单株F0呈正相关,与单株Pn、Fv/Fm、Fv/F0呈负相关;吉农大302与金玉4号群体产量与LAI、单株F0呈负相关,与单株Pn、Fv/Fm、Fv/F0呈正相关,且金玉4号的相关程度要高于吉农大302。Under different density conditions,it was studied that the photosynthesis characteristics and yield of three plant types spring corn.The results showed that with the density increased,LAI and Fo were to rise,Pn,Fv /F0 and Fm/Fv were to decline.With the density increasing,effective ear of unit area fall after raise,Kernel number per ear was to decline,100-grain weight changed for varieties.The max yield of XY335,JY4,JND302 were 9 638.45,8 523.94,8 330.92 kg/ha.The optimal density of XY335 was 75 000 plants/h...

关 键 词：玉米 密度 株型 光合特性 产量 

分 类 号：S51[农业科学—作物学]