Introduction Culture Experiments on Precocious Walnuts in Ganzi Prefecture

Five varieties of precocious walnuts were selected for conducting the introduction culture in Luding County in Ganzi Prefecture. Through investigation and observation in 3 years,the results showed that the survival rates and preserving rates of seedlings among different varieties all reached extremely significant level,but the difference of different experimental fields was not significant. The phonological period of introduced varieties was earlier than that of the original variety. Xiangling Variety and Yanyuanzao Variety showed good suitability. And their early maturing and resistance properties were significantly superior to the original variety. Especially,the ecological adaptation of Yanyuanzao Variety was strong,and the growth potential was vigorous,and the early maturing was good,which was the precocious walnut variety suiting to be planted in Ganzi Prefecture.