Abstract: Effects of Zn-deficiency nutrient solution on growth and development of tomato (Lycopersicon esculentum miller) and green pepper(Capsicum frutescens L.Var.grossum Bailey),and the concentration of P,K,Ca and Zn in organs of the two given plants was studied.The results showed that there was a close relationship between Zn-deficiency symptom on leaves and P,Ca concentration in the leaves.The symptom was independent on Zn concentration.Zn-deficiency disease resulted from over-accumulation of phosphorus and a great decrease of calcium in leaves,and from ion imbalance induced by reduction of K concentration. It indicated that Zn-deficiency in nutrient solution did not directly lead to decrease of Zn concentration in leaves.