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The research carried out at the Experimental Station of the University of Agriculture in Krakow aimed to assess the utility value of the turf of a lawn sown with the “Super Trawnik” lawn mixture. The experimental factor was spraying the turf with an amino acid preparation in the form of the AMINO ULTRA Fe-20 fertilizer in three doses: 0.3, 0.5, and 0.7 dm3·ha−1. The iron in the tested preparation is complexed with glycine, a natural plant transporter of microelements. A total of 60 g (variant I), 100 g (variant II), and 140 g (variant III) Fe·ha–1 were applied accordingly. The assessment of the examined features was performed based on a nine-point scale. The highest aesthetic and functional values were characteristic of the grass in sites with the highest dose of complexed iron (variant III). The applied fertilization reduced the occurrence of plant diseases. Compared to the plants from the control groups, infestation with snow mold was 14% lower, and the occurrence of brown leaf blotch was lower by 16%. Satisfactory results were also obtained at the sites where the preparation was applied at a dose of 0.5 dm3·ha−1 (variant II). At these sites, a higher, more favorably assessed compactness and higher resistance to snow mold and brown leaf spots were found compared to the plants from the control groups. The major finding of this work is that applying a higher dose of foliar iron fertilizer complexed with glycine allows one to obtain a high-quality lawn in terms of visual and functional features.

As plant growth stimulants, Ti and amino acids affect physiological processes of plants, promoting their vegetative and generative development and improving their yield and its quality. An experiment was carried out at the Experimental Station of the University of Agriculture in Krakow on degraded black earth soil formed from loess. Its aim was to determine the effect of two products, one containing amino acids and the other with Ti, on the Poa pratensis yield and its quality. Foliar application of amino acids and Ti, used on their own and together, constituted the main factor of the experiment. It was found that the treatment with both stimulants applied together significantly affected plant parameters. Compared to control, plants treated with those growth stimulants produced higher dry matter yields and contained significantly more phosphorus, potassium, calcium, magnesium, and sodium in dry matter. The highest effect was recorded on plots where combined application of amino acids and Ti was used. Almost as good results were recorded when amino acids were applied on their own. Regarding the cuts, higher effects were noted in the first and second ones than in the third. The growth stimulants used in the present experiment had a positive effect on the chemical composition of Poa pratensis meadow plants. The results indicated that the treatment significantly increased macronutrient content, compared to control plants. The most favourable effects were recorded for plants on the plot with combined application of amino acids and Ti. Similar results were also obtained on plots where only amino acids were used. Regarding the harvests, better results were noted in the first and second ones than in the third. In view of the potential benefits, it would be advisable to extend and update research on the effects of these stimulants on other common varieties of forage grasses.