The results show that IAA and NAA could improve the living rate of top grafting,with the best ratio being A_3C_2D_1,the highest living rate being 99.3% and the branch length being 128.3 cm; but that GA_3 restrained the living rate.

• 结果表明:采用IAA和NAA能够提高银杏嫁接成活率；最好组合是A3C2D1；成活率达99.；3%25；枝梢生长达128