A dual grafting method for cuttage grafting comprises a rootstock planting step, a scion obtaining step, a rootstock jointing step, a scion cutting step, a cuttage grafting step, etc. In the main of the disclosed grafting method, a grafting step is performed in a cotyledon expansion period of two rootstocks, capable of reducing growing days of the rootstocks, lowering the expenditure in the rootstock growth period, and greatly lowering the cost. Besides, a grafting hole is formed on a section of the two rootstocks so that a hypocotyl of the rootstock can be planarly applied to the grafting hole of the rootstock with less cracking, and therefore the rootstocks can substantially have a reduced wall thickness after being cut. In the scion cutting and peg grafting steps, the cutting length of the scion can be shortened so as to exactly peg-graft the peg grafting part of the scion between two rootstocks, and the grafting cutting surface can be in close contact with the grafting hole of the two rootstocks, thus to enhance the nutrient uptake rate of the scion.一種插接之雙重嫁接方法,其包含:砧木種植、取得接穗、砧木接作、接穗切割以及進行插接等步驟,其中,本發明之嫁接方法主要係在二砧木之子葉展開期就開始進行嫁接步驟,不僅能減少砧木的生長天數,降低砧木生長期間的花費,大幅降低成本,且二砧木係由切面加工成形嫁接孔,使得砧木之胚軸以平面施作嫁接孔時較不會裂開,且切割後之砧木能大幅降低壁厚,當進行接穗的切割及插接步驟時,不僅能縮短接穗之切割長度,讓接穗之插接部能確實插接於二砧木間,並同時以嫁接切面與二砧木之嫁接孔緊密接觸,提升接穗養分吸收之效率。10‧‧‧接穗11‧‧‧插接部111‧‧‧嫁接切面20‧‧‧砧木21‧‧‧子葉22‧‧‧切面221‧‧‧嫁接孔23‧‧‧嫁接夾
