“丰34×F83”玉米单交种是我所1974—80年以自选自交系丰34与法国自交系F83配制而成的早熟高产单交种。经几年来所内外试验有以下优点。1、早熟出苗至成熟只需106—112天,生育期积温2160-2268℃,四年平均为2240.3℃。1979年在五原县城关公社浩丰八队试验,比蒙单二号早熟十多天,当蒙单二号抽雄时,“丰34×F83”已进行灌浆;同 “Fung 34 × F83” corn single cross is my 1974-1980 years to choose from inbred Feng 34 and the French inbred F83 formulated from the early maturity and high yield single cross. After several years of internal and external testing has the following advantages. 1, early maturing to maturity only 106-112 days, growth temperature 2160-2268 ℃, four-year average of 2240.3 ℃. In 1979, in Wuyuan County Chengguan Commune Haofeng eight teams test, more than a single day than the Mongolian two more than ten days, when the Mongolian No. two tasseled, “Feng 34 × F83” has been grouted; with