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京早13号夏播玉米新品种是北京市农林科学院玉米研究中心选育的，在1998年参加北京市顺义区品比试验中，在参加的20个新品种中名列第一位，667平方米产592．6公斤，比对照唐抗5号667平方米产458．4公斤，增加134．2公斤．增产29．2％，显著性测定达到极显著水平。该品种生育期9
Beijing early morning 13th sowing new varieties of corn is Beijing Academy of Agriculture and Forestry corn breeding center selection, in 1998 to participate in Shunyi District, Beijing Commodity ratio test, to participate in the 20 new varieties in the first place, 667 square 592.6 kilograms of rice, compared with the control Tang anti-667 square meters 458.4 kilograms, an increase of 134.2 kilograms. The yield increased by 29.2% and the significance determination reached the extremely significant level. The variety of growth period 9