豫芝5号原名郑27，系河南省艺麻研究中心1984年从豫芝一号繁殖田中选出的天然杂交株繁育而成。1990年河南省农作物品种审定委员命名豫芝5号，1990年引入我省。1990年以后在我县试种，一般亩产75～100公斤，高产田可达150公斤。该品种属中熟单杆型品种，夏播生育期90～95天，生 Yu Zhi 5, formerly known as Zheng 27, Department of Art Research Center in Henan Province in 1984 from Henan Yuichi breeding field selected from the natural hybrid breeding. In 1990 Henan Province, crop varieties designated member named Yuzhi No. 5, introduced to our province in 1990. After 1990, trial planting in our county generally yields 75-100 kilograms and 150 kilograms of high-yield farmland. The varieties are ripe single pole varieties, summer sowing period of 90 to 95 days, students