The effects of variation characteristics of inclusions in walnut stock and scion on the survival of walnut grafting during 4 grafting terms (including January, February, March and June) were studied. The results indicat that the contents of vegetable tannins, plant polyphenol, sodium and potassium were the lowest in March, and the lowest value of soluble protein and magnesium appeared in January and June, respectively. However, the contents of magnesium and soluble protein were the highest in March. The highest value of water, potassium and plant polyphenol appeared in June, and that of total nitrogen, sodium and vegetable tannins appeared in January. In addition, the maximum and minimum contents of other inclusion appeared in different months because of the difference of stock and scion.The grafting survival rate was the highest in March. It was up to 56%.The correlation between the grafting survival rate and the content of soluble protein, vegetable tannins and plant polyphenol of scion was significant at P≤0.05 or P≤0.01, respectively. On the other hand, it was also significant at P≤0.05 or P≤0.01 between the grafting survival rate and the content of plant polyphenol, potassium of stock. Therefore, the best term to graft walnut in the Sichuan basin is in March, and the contents of soluble protein, vegetable tannins, plant polyphenol of scion and plant polyphenol, potassium of stock are important factors in affecting the grafting survival rate of walnut.

walnut; inclusion; variations; grafting period; grafting survival rate