玉米高产与群体整齐度间关系的调查分析  

Investigation on Relationship between High Yield and Population's Uniformity in Maize

作　　者：王玉贞[1] 刘志全[1] 王国琴 李勇 

机构地区：[1]吉林省农科院玉米所,综合所,公主岭136100

出　　处：《玉米科学》2000年第2期43-45,共3页Journal of Maize Sciences

摘　　要：无效株是影响群体整齐度的重要因素 ,主要包括 :自交株、空秆、小穗株及病虫害株等。不同产量水平的玉米群体中无效株率不同 ,无效株率越低 ,产量越高。在高密度条件下高的单株产量乃是高产的重要前提。提高种子和耕种质量 ,留大、壮苗是降低群体无效株 ,提高群体及果穗整齐度的重要措施 ,是进一步挖掘群体增产潜力的重要保证。The main factor that affects population's uniformity is invalid plant including inbred lines,barren stalk rate,diseases and pest insects plant in populations of different yield level.The lower of invalid plant rate,the higher of yield. A high single plant yield is very important to population's yield in high-Density condition.In order to decrease invalid plants in popualtions,pure seeds、carefully cultivation and Selecting big and strong seedlings is needed to guarantee high yield.

关 键 词：玉米 群体整齐度 产量 种植密度 

分 类 号：S513.04[农业科学—作物学] S513.01