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四早６号由吉林省四平市农科院玉米所１９８６年育成，组合４３４×４Ｆ１．该品种为中早熟种，出苗至成熟１１３天（公主岭市），需≥１０℃活动积温２２２４℃．１９８９～１９９３年参加各类试验均表现高产、稳产、优质、抗性强、适应性广．在每公顷５．０万株密度下，平均公顷产量８３０４．４ｋｇ，比通单１４号增产１２．５％；比东农２４８增产１８．７％，比白单九增产１３．７％．适宜在吉林省东部半山区、黑龙江省第二积温带及内蒙古兴安盟、哲盟等地≥１０℃活动积温２４００℃左右的地区种植．春玉米区一般４月下旬至５月上旬播种为宜；清种密度一般每公顷４．５～５．０万株，肥水充足的地区或地块每公顷保苗可达５．５万株。制种父母本同期播种。父母本行比１：４，母本公顷保苗６．０～７．０万株，父本公顷保苗５．０万株。
As early as No. 4 on the 6th by the Siping City, Jilin Province Academy of Agricultural Sciences corn bred in 1986, a combination of 434 × 4F1. The variety is middle-early-maturing, emergence to mature 113 days (Gongzhuling City), required ≥ 10 ℃ active accumulated temperature 2224 ℃. From 1989 to 1993, all kinds of experiments showed high yield, stable yield, high quality, strong resistance and wide adaptability. At a density of 50,000 plants per hectare, the average yield per hectare was 8304.4kg, an increase of 12.5% over that of No. 14; an increase of 18.7% over Dongnong 248 and a 13.7% increase over that of Shiban 9. It is suitable for planting in the semi-mountainous area in the eastern part of Jilin Province, the second accumulated temperate zone in Heilongjiang Province and the Xing’an League, Zhemeng and other places in Inner Mongolia where the accumulated accumulated temperature is about 2400 ℃ ≥10 ℃. Generally, the spring maize area is suitable for sowing from late April to early May; the density of clear seeding is generally 4.5 to 5.0 million ha per hectare, and the area with sufficient fertilizer and water or up to 55,000 saplings per hectare. Seed production of the same period planted. The ratio of parents to parents is 1: 4, and the mother plant covers an area of 60,000 to 70,000 hectares and the father’s plant covers an area of 50,000,000 hectares.