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承玉四号玉米品种是由河北省承德县种子公司育成,1997年通过河北省承德市农作物品种审定委员会审定。由沈丘县种子公司引进试验示范,1998年通过周口地区认定,可在全区推广。该品种自1996年至1998年连续三年在我县多点试验、示范,在先后遭到低温阴雨、高温干旱、涝灾、病害流行、特大风灾的情况下,表现出较强的抗病、抗灾、抗倒能力。绿叶成熟,高产稳产。三年试验结果表明:承玉四号均处于45个参试玉米品种
Chengyu No.4 maize variety was bred by Chengde County Seed Company in Hebei Province and passed the Crop Variety Approval Committee of Chengde City in Hebei Province in 1997. By Shenqiu seed companies to introduce pilot demonstration, in 1998 by Zhoukou area identified, can be promoted in the region. The variety from 1996 to 1998 for three consecutive years in my county more tests, demonstrations, has been in the cold rainy days, high temperature and drought, floods, disease epidemic, especially the case of severe winds, showing strong resistance to disease and disaster , Lodging ability. Green leaves mature, high and stable yield. Three years of test results show that: Cheng Yu four are in the 45 participating maize varieties