【摘要】 三年来的生产示范表明，Ⅱ优５０１在六安地区连续三年平均单产为８５９９．５～９３２４ｋｇ／ｈｍ２，比汕优６３分别增产１０．６１％～１３．２７％，且出米率达７１％，含直链淀粉１８．５５％、粗蛋白９．７２％、粗脂肪３．２％。同时通过品比试验、示范研究与制种摸索，了解了其株高１１１．５ｃｍ、穗大粒多、生育期１４２天左右，属中籼迟熟类型。提出了Ⅱ优５０１的高产种植技术与制种技术要点：母本５月上旬播种，８月上中旬扬花；父母本播差期３～６天，母本播种１１２～１５０ｋｇ／ｈｍ２；父母本行比１∶１０～１２或２∶１２～１４。肥床旱法育秧，秧龄２５～３０天，株行距为１３．３×２５ｃｍ或１６．７×２０ｃｍ，３０穴／ｍ２。更多还原

【Abstract】 By experiment of hybrid rice combination You 501 in the past 3 years,the results indicated that the paddy yield and rice quality of You 501 all were much higher and better than those of the control variety Shanyou 63.By systematic study,its growth and development characters were explored,and the culture and hybrid seed producing were given too.更多还原