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豫玉二号玉米(原名郑单八号)是河南省农科院育成的高产、稳产、抗病、株型理想的新杂交种。在1985～1987年各地示范推广中均表现高产、稳产,已显示出巨大的增产潜力及经济效益。为迅速提高豫西的玉米产量,我们于1987年进行了高产试验,亩产达500公斤以上,并对其生育规律及高产生理指标进行了探讨,为大面积推广提供理论依据。
Yuyu No. 2 corn (formerly known as Zheng No. 8) is a new hybrid of high yield, stable yield, disease resistance and plant type bred by Henan Academy of Agricultural Sciences. From 1985 to 1987, all the demonstrations and popularizations showed high yield and steady production, which showed great potential for increasing production and economic benefits. In order to rapidly increase the yield of corn in western Henan, we conducted a high-yield experiment in 1987 with a yield of 500 kg or more. The fertility and high-yielding physiological indices were discussed to provide a theoretical basis for large-scale popularization.