京早七号玉米是北京农科院用黄早四做母本,罗系3做父本,配制成的一个早熟杂交种。在我省种植面积达400多万亩。生产实践证明,京早七号具有三大特点:①成熟早、品质好。全生育期夏播85 Beijing early morning corn No. 7 is the Beijing Academy of Agricultural Sciences with Huang Zao 4 as the female parent, Luo Department 3 as the male parent, formulated as a precocious hybrids. In our province more than 400 acres planted area. Production practice has proved that Beijing early on the 7th has three major characteristics: ① mature early, good quality. The whole growth period summer broadcast 85