铁杆早是保定地区农科所于1973—1977年从日本60日谷中系选而成。比铁杆黄谷早熟4—7天,故命名铁杆早。它与亲本的主要区别是:杆较矮,穗细、码紧、无刺毛,苗期叶鞘浅紫色,叶片绿色,成熟期早10天,千粒重较高。该品种适合在肥沃水浇地条件下种植。生育期90天左右,株高120厘米,穗长12—15 Irons as early as the Agricultural Science Institute of Baoding in 1973-1977 from the Japanese 60 Valley in the election. 4-7 days earlier than iron hard yellow valley, so named irons early. The main difference between it and the parents is: shorter stems, thin ears, tight yards, no bristles, leaf sheath light purple seedlings, green leaves, mature early 10 days, 1000-grain weight higher. The variety is suitable for planting under conditions of fertile irrigated land. Growth period of about 90 days, plant height of 120 cm, spike length 12-15