关键词: 温州蜜柑, 矿质元素, 动态变化

Abstract: The fluctuation of N, P, K, Ca, Mg, Fe, Mn, Zn, Cu and B concentration in fruits of Citrus unshiu at different developing stages differed from that in leaves. Generally, the concentration of the mineral element in fruit was lower than that in leaf; the concentration in fruit reached the peak stags earlier than that in leaf. The changes of concentration of these elements in fruits were more complicated before July. However, they tended to te stable after September. Whether the optimum period for sampling fruit is in September and early October to make the nutrient diagnosis of citrus is also discussed.

Key words: Citrus unshiu, Mineral elements, Fluctuation curve