不同品种的边际效应对玉米产量影响分析

在相同密度下研究了7个不同品种从边1行至边5行玉米产量性状的变化.结果表明,从边1行至边5行,单株产量、穗粒数、百粒重逐渐减小,不同品种单株产量、穗粒数、百粒重随边行增加而递减的速度不一样,一般到边3行时减小的速度变缓.穗粒数的减少和百粒重的降低导致了单株产量的降低,穗粒数的减少是单株产量降低的主要因素,边际效应较小的品种单株产量降低的主要因素是百粒重的降低.

The Influence Analysis for the Marginal of Different Varieties on Maize Yield

In this study, maize yield traits were analyzed for 7 different varieties from the first row to the edge five rows in the same density.The main results showed that yield per plant, grain numbers per ear and 100- kernel weight decreased gradually with rows increasing.But speed reduced may related with different variety.Different maize variety had different the marginal effect.Reduction of grain numbers per ear and 100- kernel weight led to reduction of yield per plant.Reduction of grain numbers per ear was major factor in reducing yield per plant, while reduction of kernel weight to a secondary factor.But there were also the opposite phenomenon, which appeared some variety had smaller marginal effect.