STUDY ON PROCEDURE OF HEALING AND SURVIVING OF GRAFT TREE WITH YOUNG SCION OF MASSON PINE

The procedure of healing and surviving of graft tree with young scion was divided into four stages: formation of thin membrane between scion and stock; differentiation of callus; connection of cambium and functional normalization of vascular system. The major findings were as follows: At first there appeared a layer of thin membrane on the surface between scion and stock within ten days after grafting and the scion growth was not obvious; within 2 or 3 weeks, callus was formed, radial saps flew and scion growth started, attention should be paid to keeping humidity in this period; within 4 or 5 weeks, cambium between scion and stock connected, axial saps also flew, and graft tree grew up remarkedly and survived; after 5 weeks the wound between scion and stock healed completely, the function of vascular system normalized and the growth of graft tree accelerated.