Impact of foliar fertilization on the yield and bioproductive parameters of perennial ryegrass (Lolium perenne L.)

The experiment was conducted at the Research Institute of Mountain Stockbreeding and Agriculture, Troyan (Bulgaria) with the aim of establishing the impact of the fertilizers Nano Sulfur and Panamin Agro on the height, productivity and composition of sown grass stand from perennial ryegrass (Lolium perenne L.). The perennial ryegrass plants have proven to form the highest grass stand with the application of Panamin Agro biofertilizer (250 g/da). The harvested biomass registered 4.05 cm (at P <0.05) higher values of the trait compared to the control (67.18 cm). The highest average yield of fresh matter was registered in the grass stand of Lolium perenne L. treated with Panamin Agro - 250 g/da. The values of the trait significantly exceeded the unfertilized control by 16.87% (P <0.05). No significant difference was proven in the amount of dry matter was found between the fertilized variants and the untreated control of perennial ryegrass. Lolium perenne L. occupied the highest relative share in the variants treated with Nano Sulfur (200 ml/da) and Panamin Agro (250 g/da). The percentage share of the grass crop was respectively 89.94% and 88.71% (in the control variant – 79.95%). The specified variants had the lowest degree of weed infestation.