In order to explore the quality difference of walnut in different main producing areas in China, ten representative samples of walnuts in Yunnan and twelve samples of common walnuts in other producing areas were selected to analyze and evaluate the main nutritional components of green skin, kernel and distraction wood of walnut. The contents of flavone, tannin and juglone in walnut green skin, the contents of crude protein, crude fat, amino acid, vitamin E, melatonin and phospholipid in walnut kernel, and the contents of crude fat, crude protein, flavone and amino acid in distraction wood were determined. The principal component analysis of walnut quality in different main producing areas was carried out. The results showed that the main components in green skin, kernel and distraction wood of ten main walnut varieties planted in Yunnan were superior to those of common walnut in general. |