密度对不同玉米基因型产量及其构成因素的影响  

Effect of Planting Density on Grain Yield and Yield Components in Different Maize Genotypes

作　　者：刘志刚[1,2] 陈范骏[2] 王庆祥[1] 

机构地区：[1]沈阳农业大学农学院,沈阳110161 [2]教育部植物一土壤相互作用重点实验室/中国农业大学资源与环境学院,北京100193

出　　处：《吉林农业科学》2014年第1期10-12,共3页Journal of　Jilin Agricultural Sciences

基　　金：公益性行业科研专项(200803030)

摘　　要：以华北地区4个主栽玉米品种和4个杂交组合为试验材料。研究不同玉米基因型在3个密度下玉米产量及构成因子的变化规律。结果表明,在相同施肥量条件下,低密和中密度产量虽无显著差异,但其产量构成因子已发生显著变化,密度增加导致单株粒重、穗粒数、百粒重下降,空秆率上升。高密下产量显著下降15.5%。相关分析表明,空秆率是影响产量的最主要因素。The effect of planting density on maize yield and yield components were studied using 4 commercial maize hybrids and 4 crosses. It was found that, although no difference in the grain yield was found between the low density and middle density treatments when fertilizer condition was the same, increasing planting density resulted in lower kernel weight per plant, the number of kernels per ear, and 100-kernel weight, but higher barrenness rate. The yield decreased by 15.5% in high density. Correlation analysis showed that barrenness rate was the most important factor which affects maize grain yield.

关 键 词：玉米 密度 子粒产量 

分 类 号：S513[农业科学—作物学]