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以柑桔品种［Ｃｌｅｏｐａｔｒａｍａｎｄａｒｉｎ（ＣＭ）和Ｓｗｉｎｇｌｅｃｉｔｒｕｍｅｌｏ（ＳＣ）］的小苗为试验材料，应用营养液水培法，研究了不同ｐＨ值（ｐＨ４．５～７．５）范围内和不同铜离子浓度（０．１～２０．０μｍｏｌＬ－１）条件下，柑桔小苗的营养吸收特性。试验结果表明：在所有试验ｐＨ值条件下，随着营养液中铜离子浓度的增加，两个品种柑桔体内积累的铜亦呈线性增加（ｒ＝０．８６～０．９６），而小苗对常量元素（磷、钾、钙、镁）的吸收以及小苗的生长量却大大地下降，其相关性达Ｐ＝０．０１的显著水平（ｒ＝０．７７～０．９９）。当营养液中铜离子浓度≥０．１μｍｏｌＬ－１就对柑桔小苗的生长有抑制作用，干扰小苗对营养元素的吸收。
Seedlings of Cleopatramandarin (CM) and Swinglecitrumelo (SC)] were used as experimental materials. The effects of different pH (pH 4.5 ~ 7.5) and different concentrations of copper ion ( 0.1 ~ 20.0μmolL-1) conditions, the nutritional absorption characteristics of citrus seedlings. The results showed that at all pH values, with the increase of Cu2 + concentration in the nutrient solution, the copper accumulation in both varieties increased linearly (r = 0.86 ~ 0.96) The absorption of constant elements (phosphorus, potassium, calcium and magnesium) and the growth of seedlings decreased significantly with a significant correlation (P = 0.01) (r = 0.77-0.99). When the nutrient solution of copper ion concentration ≥ 0.1μmolL-1 on the growth of citrus seedlings inhibited, interfere with nutrient absorption of seedlings.