Research was carried out in years 2007-2009 on the basis of field experiment in split-plot design, in three repetitions. Monoculture lawn was set up for the experiment. In pure sowing, four species of lawn grass were studied: perennial ryegrass, red fescue, common meadow-grass, and common bent. In the experiment, the following factors were applied: bedding type: a – no hydrogel „0” –control plot; b – with the addition of hydrogel at the depths of 5 cm, 10 cm, and 15 cm; soil cover: a – cultivated soil (P); b – horticultural peat (T). At the end of each growth period, turf samples with root systems were collected from the plots at the depth of 10 cm. On their basis, the assessment of root dry matter was carried out and the number of roots was calculated on each turf block. In the particular research years, both the number of shoots and root mass formed by the studied monoculture lawns were diversified in relation to the bedding type. In the first research year, on the bedding with 5 cm depth of hydrogel placement, the studied monocultures formed the highest root mass, and in the second year the highest shoot number. Horticultural peat cover in both research years increased both the number of shoots and the root mass of the studied monoculture lawns.

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