EN
On a base of achieved results it can be stated that ryegrass share in obtained fodder greatly depended on the variety and performance year, as well as the harvest date (cut). Lolium perenne cultivars included in mixtures significantly affected the differentiation of the sward floristic composition. Share of grasses sown in these grass mixtures (Phleum pratense, Dactylis glomerata) and white clover (Trifolium repens) was much higher in control mixture sward (without Lolium perenne) or in mixtures where lower share of ryegrass was recorded, as weil as in the sward from the first cuts (lower Lolium perenne share). Furthermore, the lack of ryegrass in the sward or its lower share more favored the development of grasses not considered in sown mixtures, particularly Poa trivialis.