Effects of Grafting Time and Grafting Methods on the Survival Rate of Carya illinoensis

Choose 1yearold Carya illinoensis seedling as rootstock and applied cutgrafting method, to study the effects of the grafting time and 3 treatments (transplanting grafts, root pruning cut grafts and not root pruning cut grafts) on survival rate and the growth of shoots. The results showed that: after grafting, the survival rate of 3 treatments appeared a peak at April 8th. Among of them, the survival rate of transplanting grafts was the highest which was 868%. From 28th May to 28th July, the survival rate of the three treatments was basically equal (33%-486%). The crude and high growth of new branchs was positive correlated to the rootstock’s diameter.