Studies on relationship between fruit yield quality and micro-elements in leaf of citrus

The results showed that the content of iron roughly 60% was the highest among the major element, and manganese was the second, while Cu was about 8% to 9%. Variation among the contents of iron was great; and the yields differed because of different contents of vitamin C. The content of microelements in the leaves was significantly correlated with fruit yield and quality, and its effect was made clear through coefficient analysis. Studies showed that zinc and manganese were generally deficient in the leaves. Fertilizers should come in the order of zinc>manganese>iron>Cu.