两个氮水平下不同玉米基因型产量与根拔拉力的关系  

Relationship Between Yield and Root-pulling Resistance in Response to Nitrogen Supply in Different Maize Genotypes

作　　者：刘志刚[1,2] 陈范骏[2] 

机构地区：[1]沈阳农业大学农学院,沈阳110866 [2]中国农业大学资源与环境学院/教育部植物-土壤相互作用重点实验室,北京100193

出　　处：《玉米科学》2013年第6期107-110,共4页Journal of Maize Sciences

基　　金：公益性行业科研专项(200803030)

摘　　要：以华北地区主栽的8个玉米杂交种和中国农业大学自育的2个杂交组合为试验材料,在不同供氮水平(0、240 kg/hm2)下对玉米子粒产量及其构成因素和根拔拉力进行研究。结果表明,百粒重在不同氮处理间差异显著,平均产量、穗粒数及根拔拉力差异极显著,穗长、穗粗及穗行数没有显著差异。不同玉米基因型产量下降的主要原因是穗粒数的降低。低氮处理下根拔拉力显著降低,其降低幅度与产量的减产幅度显著相关,可作为氮高效品种筛选的指标之一。The relationship between yield and root-pulling resistance were investigated at two nitrogen levels （0 and 240 kg/ha） by using 8 commercial maize hybrids and 2 unreleased hybrids. The results showed that there were significant decreases for both vertical root-pulling resistance and yield under lower nitrogen supply. Yield decrease was mainly resulted from the reduction of kernel number. Furthermore, a significant positive correlation for the falling range between vertical root-pulling resistance and yield was further observed, which might be used as one of the indi-cators for screening nitrogen efficient varieties.

关 键 词：玉米 氮肥 产量 根拔拉力 

分 类 号：S513.062[农业科学—作物学]