Losses of Ca, Mg and SO42- S with drainage water at fertilisation with different nitrogen rates.

Abstract

Quantities of Ca, Mg and SO42- S leached by drainpipe water from drained Stagnosols of Central Croatia are determined for the period from 1997 to 2004. Ca2+, Mg2+ and SO42- S concentration in drainage water varied in dependence on the crop type and development stage, on the fertilization, on the quantity and intensity of precipitation, and on the drainage volume. In 8-year average, quantities of Ca, Mg and SO42- S leached with drainage water at selected trial treatments with uniform P and K fertilisation and with diff erent nitrogen rates varied from 96.6 to 142.4 kg ha-1, from 46.7 to 69.2 kg ha-1 and from 10.6 to 15.2 kg ha-1, respectively.