CAJ | 학술논문

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。
이화북지구주재적8개옥미잡교충화중국농업대학자육적2개잡교조합위시험재료，재불동공담수평(0、240 kg/hm2)하대옥미자립산량급기구성인소화근발랍력진행연구。결과표명，백립중재불동담처리간차이현저，평균산량、수립수급근발랍력차이겁현저，수장、수조급수행수몰유현저차이。불동옥미기인형산량하강적주요원인시수립수적강저。저담처리하근발랍력현저강저，기강저폭도여산량적감산폭도현저상관，가작위담고효품충사선적지표지일。
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.