庆单2号(庆发1817)是大庆市庆农西瓜研究所用自选自交系杂交育成的玉米新品种。2001年,黑龙江省农作物品种审定委员会审定通过,该品种适合黑龙江省第一积温带下限和第二积温带上限种植。 1 特征特性 1.1 生育期:从出苗至成熟生育日数123d,需≥10℃活动积温2600℃左右。 Qingdan 2 (Qingfa 1817) is a new maize cultivar developed by Qingnong Watermelon Research Institute in Daqing City with self-selected inbred lines. In 2001, the Crop Variety Approval Committee of Heilongjiang Province passed the approval, which is suitable for planting the lower limit of the first accumulated temperate zone and the upper limit of the second accumulated temperate zone in Heilongjiang Province. 1 Characteristics 1.1 Growth period: from emergence to maturity date 123d, required ≥ 10 ℃ activity temperature 2600 ℃ or so.