阴雨寡照条件下密度对夏玉米叶面积和产量的影响  

Effects of Plant Density on Summer Maize Leaf Area and Grain Yield under Cloudy & Rainy Conditions

作　　者：孔祥彬[1] 白星焕[1] 王同芹[1] 

机构地区：[1]山东省潍坊市农业科学院/国家玉米产业技术体系潍坊综合试验站,山东潍坊261071

出　　处：《玉米科学》2012年第4期64-68,共5页Journal of Maize Sciences

基　　金：国家现代农业产业技术体系建设专项(CARS-02-55)

摘　　要：选用玉米品种郑单958和金海5号,设不同种植密度,研究阴雨寡照条件下种植密度对夏玉米叶面积、干物质积累及产量的影响。结果表明,在整个生育期,郑单958和金海5号群体叶面积指数(LAI)均随密度的增加而增大,但LAI增长率和单株叶面积逐渐减小,表明随着密度提高,LAI增加是单株叶面积减少和群体数量增加共同作用的结果。随着密度增加,两个品种单株干物质积累量均呈下降趋势。郑单958和金海5号在52 500株/hm2的密度下产量最高,分别为7 358.3 kg/hm2和7 016.7 kg/hm2。Summer maize cultivars Zhengdan958 and Jinhai 5 were used as the experimental materials and planted with different planting densities.The results showed that,leaf area index（LAI） increased significantly with the increasing of plant density while the rate of LAI and the per plant leaf area were decreased.The dry matter accumulation of Zhengdan958 and Jinhai 5 decreased significantly with the increasing of plant density.Zhengdan958 had the maximal grain yield 7 358.3 kg/ha at 52 500 plants per ha,which Jinhai 5 had the maximal grain yield 7 016.7 kg/ha at 52 500 plants per ha.

关 键 词：玉米 郑单958 金海5号 阴雨寡照 种植密度 干物质积累 

分 类 号：S513.01[农业科学—作物学]