Ten early-maturing varieties which origin from several units have been used for comparisons of early maturity,yield and resistance via using a triplicate randomized blocks design and direct seeding way.The results suggested that G-7 and Deyou 1 were the earliest maturing varieties,following by Za1062,Zao0902 and Zao0904.As the unit yield,Zao0902,Zao0904 and G-7 yielded 10% more than the check variety.So Zao0902,Zao0904 and G-7 would be used as commercial early-maturing varieties planted f...