Wpływ hydrożelu i rodzaju nawozu mineralnego na zadarnienie muraw trawnikowych o zróżnicowanym udziale życicy trwałej
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The aim of this work was to determine the effect of hydrogel and type of fertilizer on the compactness of turf lawn with varying participation of perennial ryegrass. Lawn experience was conducted in the years 2002–2004 on the experimental plots in the system of randomized blocks with an area of 4 m2 (4 x 1 m) in four replications. In the study were used four commercially mixtures of grasses with different purposes and different percentage of perennial ryegrass: Wembley (80%) – M1; Parkowa (60%) – M2; Relax (40%) – M3 and Półcień (20%) –M4. Those mixtures were used with hydrogel applied in the subsoil or without his participation. In combination with hydrogel was used granulated polyacrylamide with the trade name Aqua-Gel P4. On the all experimental objects the mineral fertilization in the ratio 6 : 2 : 4 NPK was applied. It was used the following fertilizers: Pokon, Trawovit Komplet, Azofoska and propozed fertilizer. Each year of the study the compactness was evaluated. This evaluation was made according to the methodology IHAR (Prończuk 1993). In subsequent years of study, the mixture lawns gradually increased the degree of compactness, with higher values in the parameter obtained for these mixtures which grown on a substrate with the applied of hydrogel Aqua-Gel P4. Among the tested lawn mixtures the highest ability to compactness had Parkowa mixture (with 60% share of perennial ryegrass), and the weakest Relax mixture (with 40%). As a result of the effect of mineral fertilizers the best lawn compactness was obtained on the plots with Azofoska fertilization in the first year of studies, but in the second and third year after using of Trawovit.
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