AbstractThe mineral content was investigated in the below‐ground biomass, the above‐ground biomass and the litter of the macrophytes in five wetlands in the valley of the river Jehlum. In different seasons, the concentrations of calcium, magnesium, sodium, potassium, phosphorus and nitrogen in the dry matter were determined. Sodium, phosphorus, potassium and calcium showed decreasing concentraions from spring to autumn. The sodium and magnesium concentrations showed an irregular trend. As a whole, the incorporated mass of substances per unit of area increases, however, in the course of the period of vegatation for the below‐ground biomass as well as the above‐ground biomass. Due to washing‐out, the litter always shows considerably reduced conce