本文主要从栽插密度、施氮量和施氮时期对杂交粳稻新组合８０优１２１进行超高产栽培技术探讨，提出８０优１２１亩产６００ｋｇ以上的超高产栽培措施为：亩栽１．５～１．７万穴（１６．７ｃｍ×２３．３～２６．７ｃｍ或２０ｃｍ×２０ｃｍ），每穴栽３．５蘖苗左右。亩和纯氮１３～１５ｋｇ，基肥占３０％，返青促蘖肥占２０％，壮秆促花肥、保花肥及齐穗肥各占１７％左右。 This paper mainly from the planting density, nitrogen rate and nitrogen application period on the new hybrid rice 80 you 121 super high yielding cultivation techniques, proposed 80 yielded 121 acres of more than 600kg super high yield cultivation measures: mu planted 1.5 ~ 17,000 points (16.7cm × 23.3 ~ 26.7cm or 20cm × 20cm), planted about 3.5 tillers per hole. Mu and pure nitrogen 13 ~ 15kg, basal fertilizer accounted for 30%, turn green tillering accounted for 20%, strong stalks promote flower and fertility, Paul Huafei and Qi Suifei accounted for about 17%.