冀东地区夏玉米产量与农艺性状的灰色关联度分析

Gray Correlation Degree Analysis on Grain Yield of Summer Maize and Its Correlated Characters

为明确冀东地区夏玉米农艺性状对籽粒产量影响的主次关系,利用灰色关联度分析法分析了22个夏玉米品种的籽粒产量与9个性状的关联度。结果表明:行粒数、单位面积穗数、株高、出籽率与夏玉米产量关联度最大,说明这些性状对产量的影响较大。因此,在本生态区夏玉米生产中,提高果穗的行粒数、单位面积穗数,同时选择株高适宜、出籽率较高的品种是提高夏玉米产量的有效途径。

To determine the influence of agronomic characters on grain yield of summer maize in eastern Hebei province, the correlation between the grain yields of 22 varieties of summer maize and 9 agronomic characters were analyzed by the method of gray correlation degree analysis. The results showed that grain numbers per row, ear numbers per unit area, plant height and grain rate were closely correlated with grain yield. This indicates that these agronomic characters can greatly influence grain yield. Therefore, an effective way to improve grain yield of summer maize in eastern Hebei province is to increase the grain numbers per row and ear numbers per unit area, select maize varieties that have suitable plant height and higher grain rate.