What are the grafting methods of red maple?

The rootstock of Hongfeng is Acer truncatum Bunge, and the rootstock is 2-4 years old seedlings, which are cut in March-April and butted in May-June. Bud grafting is carried out in the vigorous growth period of rootstocks from May to June. Buds can be full buds on sunny branches in the same year, but after grafting, the temperature is high, the cortex of red maple is thin and the buds are small, so spraying moisture can improve the survival rate, but it should be noted that water can not enter the incision. If it germinates after the autumn cool in August and September, the temperature is 20 ~ 25℃, but at this time, the rootstock grows slowly, and it is often impossible to peel in case of drought. At this time, you can water the rootstock in advance or use bud grafting.