The Influence of Calcium Sulfate and Different Doses of Potassium on the Soil Enzyme Activity and the Yield of the Sward with a Mixture of Alfalfa and Grasses

Between 2012 and 2015, a field experiment was conducted at the Brody Experimental Farm, Poznan University of Life Sciences, Poland. The following two experimental factors were used in duplicate: calcium sulfate (CaSO4) fertilization—two levels (0 500 kg ha−1); potassium (K) fertilization—four (0, 30, 60, 120 ha−1). soil pH (in H2O) enzyme activity (dehydrogenase, acid phosphatase, alkaline phosphatase) determined. fertilizer had significant influence only on dehydrogenase activity, which increased with dose potassium. research showed that fertilization sward mixture alfalfa grasses doses 60 ha−1 K combinations resulted higher yields fresh matter than combination without (K 0). In last year research, additional CaSO4 highest increase yield grasses, as compared variant this fertilizer. application first years also matter.