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1吉林省玉米品种研究吉林省气候属温带季风气候,夏季高温多雨,冬季寒冷漫长。年平均降水量维持在500mm左右,无霜期在100~160d。九单50是以009为母本,抗病黄早4为父本的中早熟玉米杂交种。2001年被吉林省农作物品种审定委员会审定通过并命名。九单50高产的方法主要有:≥10℃积温在2 750℃以上;选择土壤肥沃、排灌方便的地块。其他需注意:在土壤温度>10℃的5月
1 Study on Maize Varieties in Jilin Province Jilin Province has a temperate monsoon climate with hot and rainy summers in summer and cold and long winters in winter. The average annual rainfall is maintained at about 500mm, frost-free period of 100 ~ 160d. Jiu Dan 50 is 009 as the female parent, early resistance Huang Huang 4 as the male parent of early hybrid corn. 2001 was approved by Jilin Province Crop Variety Approval Committee and named. Nine single 50 high yield methods are: ≥ 10 ℃ accumulated temperature above 2 750 ℃; select the fertile soil, irrigation and drainage convenient land. Other needs to be noted: May in soil temperature> 10 ℃