Study on Grafting Techniques of Macadamia integrifolia

[Objective] The study was to provide the experimental basis for seedlings production of Macadamia integrifolia.[Method] With seedlings of M.integrifolia variety 800 as the rootstocks,H2,OC,788 as the scions,the effects of different grafting times,grafting methods and rootstock coarseness on the survival rate of grafting were studied.[Results] When the grafting methods were similar,the survival rate of grafting was the highest in late February with average survival rate of 53.3%,followed by grafting in autumn with average survival rate of 48.3%.When the grafting method and grafting time were similar,the survival rate of grafting was the highest when the diameter of rootstock stem was 0.90-1.29 cm,and the average survival rate was 79.0%.Under the same conditions,the survival rate of cut grafting with short scion was the highest with the average survival rate of 80.0%,followed by cut grafting and branch ventral grafting with the average survival rates of 61.00% and 48.50% resp.The survival rate of bud grafting was the lowest,only being 32.5%.[Conclusion] The optimum grafting measures for M.integrifolia was rootstock coarseness of 1.0-1.3 cm,grafting time of before or after 10 days of rain,grafting method of cut grafting with short scion.