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The data from the analysis indicate that T. pratense in a pure crop shows the highest resistance and adaptability in foot-hill conditions, and in mixed with L. perenne maintains the highest presence. Grass stands of T. repens had the highest CP content (210.9 g kg-1). The excess was by 9.6% (compared to L. corniculatus), 16.6% (compared to T. pratense) and 32.1% (compared to the average value). It is the crop with the lowest content of CFr (a decrease of 27.2% compared to the average value). The highest protein content was found in the biomass of L. perenne with T. pratense (151.5 g kg-1), followed by the mixture with L. corniculatus (144.8 g kg-1) and T. repens (129.7 g kg-1). Grass stands of L. corniculatus and its mixtures with L. perenne had the highest content of DM. T. repens (63.7 g kg-1) and the mixture of L. perenne with T. pratense (63.4 g kg-1) had the highest ash content. [ABSTRACT FROM AUTHOR]

The aim of the study was to determine the amount of crude protein yield and the yield of feed units in the fodder biomass of six variants of two-component legume-grass mixtures (Lotus corniculatus- Festuca rubra; Trifolium repens - Lolium perenne; Trifolium repens - Poa pratensis; Trifolium pretense - Phleum pretense; Medicago sativa - Dactylis glomerata; Trifolium pretense - Festuca pratensis) that would provide high-quality fodder in the conditions of the Central Balkan Mountain. The highest crude protein yield is for the mixtures Tr. pratense L. + F. pratensis L. and Tr. repens L. + P. pratensis L. The legume crop predominated in the regrowths of both variants during the entire experimental period from 7.4% to 48.4%, respectively, and the ratio of legume:grass in the mixed grass stands was 47.7:40.3% (Tr. pratense L. - F. pratensis L.) and 62.3:13.9% (Tr. repens L.- P. pratensis L.). A proven difference in crude protein yield was found between Tr. repens L. - P. pratensis L. and M. sativa L. - D. glomerata L. mixtures. The highest yield of feed units for milk and growth was found in the forage mixture of Tr. pratense L. with Ph. pratense L. [ABSTRACT FROM AUTHOR]

Foliar fertilizing of meadow grass stand of type Chrusopogon gryllus L. type and pasture grass stand of Nardus stricta L. type with humate fertilizer, such as Biostim (400 ml/da) increases the crude protein content in dry matter by 34.2% and 31.3%, respectively. The highest energy and fodder nutritional value is the fodder mass of the variants treated with a dose of 400 ml/da (for Chrusopogon gryllus L.) and 200 and 300 ml/da (for Nardus stricta L.). The amount of gross energy in meadow grass stands is 1.0% lower than in pastures. The efficiency of the applied biofertilizer is most pronounced in the variants with 100 ml/da dose, where the amount of dry matter and crude protein reaches 808.80 kg and 79.55 kg - for meadow and 509.60 kg and 28.79 kg - for pasture grasslands. There is no difference in the total costs (7.87 BGN/da) regarding the application of foliar fertilizers in pasture and meadow grass stands. The total revenue, total profit, profitability and critical level of the yield from the conducted agrotechnical measure in the meadow grass stands are higher by 19.9%, 25.4%, 27.7% and 92.1% respectively compared to those of the pastures, but at a lower cost price. [ABSTRACT FROM AUTHOR]