1964年在王太堡农业试验场进行的甘、宁、青及内蒙西部春麦联合区域试验中,华东5号小麦品种表现较突出,具有早熟和抗锈等优点,产量居第一位。该品种即是“5503”,早在1957年引入该场,经过1958～1963年连续6年试验,表现比碧玉麦增产。其中除1963年因倒伏较重,增产幅度不高外,共余年分的产量都居前三位。去年甘肃农科院提 In 1964 in Wang Taibao Agricultural Experimental Field of Gan, Ning, Qing and Inner Mongolia western spring wheat regional trials, East China 5 wheat varieties more prominent, with the advantages of early maturity and rust resistance, yield first place. The variety is “5503”, introduced as early as 1957 in the field, after 1958 ~ 1963 for 6 consecutive years of trials, performance than Jasper wheat yield. Among them, except for the heavy lodging in 1963 and the low rate of increase, the output of the remaining years is the top three. Last year, Gansu Academy of Agricultural Sciences mention