Sód i chlorki w wodach drenarskich
w uprawie anturium (Anthurium cultorum Schott)
w keramzycie^*

Abstract. The studies were carried out in two specialist farms with anthurium (Anthurium cultorum Schott) cultivation. The plants were grown in expanded clay with application of fertigation with standard nutrient solution (in mg·dm^-3): N-NH₄ < 14.0, N-NO₃ – 105.0, P – 31.0, K – 176.0, Ca – 60.0, Mg – 24.0, S-SO₄ – 48.0, Fe – 0.840, Mn – 0.160, Zn – 0.200, B – 0.220, Cu – 0.032, Mo – 0.048, pH – 5.5-5.7, EC – 1.5-1.8 mS·cm^-1. Concentration of sodium and chlorine were analysed in nutrient solution and drainage water during 3-year studies. It was shown, that contents of sodium in drainage water significantly increased (33.1%). There was no significant effect for chlorides, however their increase up to 8.1% is important for the estimation of environment pollution by the open fertilization systems. Increased sodium and chloride contents in the drainage water arise the need to dilute them in preparing nutrient solutions in closed fertilization system.

Sodium and chlorids in drainage water in growing
of anthurium (Anthurium cultorum Schott)
in expanded clay

Summary

The studies were carried out since 2002 till 2004. There were tested the most popular varieties of anthurium (Anthurium cultorum Schott) in Poland. The plants were grown in expanded clay with application of ferigation with standard nutrient solution: N-NH₄ < 14.0, N-NO₃ – 105.0, P – 31.0, K – 176.0, Ca – 60.0, Mg – 24.0, S-SO₄ – 48.0, Fe – 0.840, Mn – 0.160, Zn – 0.200, B – 0.220, Cu – 0.032, Mo – 0.048 (mg·dm^-3), pH – 5.5-5.7, EC – 1.5-1.8 mS·cm^-1. There were found changes of sodium and chlorine contents in drainage water comparing to nutrient solution. Concentration of sodium increased by 33.1% and chlorine up to 8.1% in drainage water. The knowledge of variations of elements in drainage waters is basic for the application of closed fertilization systems with recirculation of nutrient solution in practice.