玉米杂交种白单九是白城地区农科所近年育成的玉米新品种,具有早熟、抗病、丰产等优点,该品种自1987年引入兴安盟种植后,在兴安盟旱地上表现出很大增产潜力,在年降雨量较正常情况下,经合理栽培管理,亩产完全可达500公斤以上。目前白单九已成为兴安盟玉米的主栽品种,1989年其种植面积约占兴安盟玉米面积的70％以上。因此研究 Baishuijiu, a maize hybrid, is a new maize variety bred in recent years by the Agricultural Science Institute of Baicheng Prefecture. It has many advantages such as early maturity, disease resistance and high yield. After it was introduced into Xing’an League in 1987, it has shown a great yield increase in the dry land of Xing’an League Potential, in the annual rainfall than the normal circumstances, the rational cultivation and management, per mu completely up to 500 kg or more. At present, Baidi 9 has become the main cultivars of Xing’an League corn. In 1989, its planting area accounted for more than 70% of Xing’an League corn area. So research