郑州地区青贮玉米引种试验

通过对10个玉米Zea mays品种试验研究，探讨其整株青贮的适宜刈割期及其各农艺性状之间的相关关系，进而选出适宜郑州地区种植的青贮玉米品种，并为栽培时性状的控制提供参考。结果表明：从产量、农艺性状、营养成分含量来说，均以蜡熟期收获为宜；株高、茎粗、果穗长、果穗粗与产量呈正相关；粗蛋白含量与绿叶数、粗脂肪含量与果穗长和果穗粗、粗纤维含量与茎粗均呈正相关关系；粗纤维与粗蛋白含量呈负相关关系；各品种间，以鲁单981、郑单968、浚单18表现好，适宜作为全株青贮玉米在郑州地区种植。

Introduction experiment of silage maize in Zhengzhou

Ten single cross hybrids of maize were introduced, and their proper harvesting stage and the correlation among agronomical traits were studied for selecting the varieties adapted to Zhengzhou. The results indicated that the proper harvesting date for silage making was in the stage of wax ripeness in terns of yield, agronomical traits and nutrient contents. The plant height, stem diameter, ear length and ear diameter showed the positive correlation with yield. The CP content was positively correlated with leaf proportion. CF content negatively correlated with CP content. Out of 10 varieties, Ludan 981, Zhengdan 968 and Jundan 18 were better and could be extended in Zhengzhou.