玉米产量及主要农艺性状的边际效应

以河南科技学院玉米育种课题组选育的10个杂交玉米杂交新组合为试验材料,对玉米单株产量及主要农艺性状的边际效应进行统计分析.结果表明:在60 000株/hm2密度下的品比试验中,不同性状的边际效应存在着较大差异,穗粗、穗长、行粒数的边际效应存在于端三株;单株产量的边际效应存在于第1端位株及第2端位株;百粒重、茎粗仅第1端位株存在边际效应,而穗行数及虚尖未检测到边际效应.各性状的总边际效应变异量在0-27.92％之间.

Marginal effect of yield and main agronomic traits on maize

10 maize hybrid combinations from Henan Institute of Science and Technology were used.Marginal effect of the kernelyield per plant,and main agronomic traits relative to yield were analyzed.The results indicated that under the 60 000 plants/hm2 cultivatedensity,with the difference of the characters,the expressing marginal effect had some differences in trial.The marginal effects were foundin the third peripheral plants for ear diameter,ear length,and kernel number per row.The marginal effect of kernel yield per plant wasfound in the second peripheral plants.The marginal effects of the weight per 100 kernels and stem diameter were showed in tip plant.However,there were no marginal effect be discovered in number of ear row and ear tip-barrenness.An arrange of the total peripheraleffect could be 0~27.92%.