Zmiany właściwości fizyko-chemicznych w wybranych ujęciach wody stosowanej do fertygacji warzyw pod osłonami

The aim of the study was to monitor the mineral composition of the water used for fertigation in soilless cultivation and the physicochemical changes ob-servation at the time. The study was conducted in the years 2011-2013. The water samples were collected from four selected water intakes located in the greenhouse horticultural farms. The samples were bimonthly taken from each water intakes. The samples were determined for pH, conductivity (EC), calcium, magnesium, and bicarbonates concentration. As a result of observation it was found that the pH of the water intakes maintained at 7.0-7.5 with a clear upward trend over time. Total salt content remained at a moderate level, and its level did not exceed 1 mS·cm-1. The water was characterized by average carbonate hardness, high calcium content, and thus the medium or high total hardness.