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原丰早是我组于1971年采用钴-60r 射线3.5万伦琴辐照中籼科字6号干种子,经5个世代选育鉴定,于1973年选育而成。主要特点是早熟、高产、稳产,适应性广。经过几年的多点试种和生产上大面积种植,一般亩产800—850斤,比同熟期其他品种增产一成以上,高产纪录每亩达1,370.1斤。目前已成为浙江、江苏、上海、湖南、湖北、安徽、江西等六省一市水稻早中熟当家品种,在长江流域年种植面积1,600万亩左右。获1982年国家发明一等奖。主要特性全生育期106—110天,比原亲本科字
Harada early my group in 1971 with cobalt -60R radiation 3.5 million Roentgen irradiation of Indica 6 word dry seed, after 5 generations of breeding identification, bred in 1973. The main features are precocious, high yield, stable yield, wide adaptability. After several years of trial cultivation and production of large-scale planting, the average yield per mu is 800-850 kg, an increase of more than 10% over the other varieties in the same period. The record high yield reached 1,370.1 kg per mu. At present, it has become a well-known early-maturing rice cultivar in six provinces and one city including Zhejiang, Jiangsu, Shanghai, Hunan, Hubei, Anhui and Jiangxi. The annual planting area in the Yangtze River Basin is about 16 million mu. Won the 1982 national invention first prize. The main characteristics of the whole growth period of 106-110 days, than the original parent word