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掖单4号是山东莱州市农科所用自育自交系8112与黄早4的杂交种。1985年通过烟台市科委技术鉴定,1988年山东省品种审定委员会认定。1982—1988年试验、示范、推广产量为500—600kg/亩,个别高产田块800—900kg/亩。在山东、黄淮、东北、西北、西南及长江中下游均表现良好,较当地对照种增产20.5
Yedan No.4 is a cross between self-bred inbred line 8112 and Huangzao 4 used in agriculture of Laizhou City, Shandong Province. In 1985 through the Yantai City Science and Technology Commission technical appraisal, Shandong Province in 1988 identified the Commission. 1982-1988 test, demonstration, promotion output 500-600kg / acre, individual high-yield plots 800-900kg / acre. In Shandong, Huanghuai, northeast, northwest, southwest and the middle and lower reaches of the Yangtze River are doing well, 20.5 more than the local control