EN
Experiment was conducted with following compositions cultivated in ratio 1: 1 : Festuca pratensis + Trifolium pratense, Dactylis glomerata + Trifolium pratense, Lolium multiflorum + Trifolium pratense. Chemical composition from three cuts was estimated, the first being gathered in a stage of full flowering of grasses, while the next were cut in every 7 weeks. Also the digestibility of those feeds was determined with milk cows together with the intake. The highest level of protein, crude fiber and acid detergent fiber /ADF/ in the mixture of Trifolium pratense with Dactylis glomerata during full flowering was observed, while the Lolium multiflorum with Trifolium pratense contained insufficiend amount of total protein for cattle, the lignin being on highest level. Among the mixtures lowest digestibility on Lolium multiflorum with Trifolium pratense was observed. The highest digestibilities in the third cut of all mixtures were prooved, and digestibility coefficients for organic mater from 68 to 72% oscylated. The energy value of Lolium multiflorum with Trifolium pratense in the two first cuts was markedly lower than in rest combinations, while in the late stage of vegetation in all the feeds energy concentration was similar. The lowest intakes of mixtures in cows on the first cut were observed, while among the mixtures the lowst one on Lolium multiflorum with Red clover had place.