EN
Studies were made in the years 1987-1991 it the IMUZ Research Station at Jaworki on elevation about 630 m. a.s.l., on the slope with northern exposition. In the trial established in 1987, yields and durability of seven varieties of Dactylis glomerata and four varieties Phleum pratense, sown with Trifolium repens (contribution of 30%), were investigated. By all time researches was applicated mineral fertilization: 180 kg of N, 80 kg of P₂O₅ and 60 kg K₂O per ha. The average yields of DM of Dactylis glomerata varieties, for four years to studies, amounted about 8,5 t ha⁻¹, whereas Phleum pratense variety yielded about 7,5 t ha⁻¹. There were no significant, statistically proved, differences in yield between studied varieties of Dactylis glomerata and Phleum pratense. Mixture with Dactylis glomerata varieties proves higher durability than Phleum pratense varieties. From Dactylis glomerata varieties the highest part in sward in 4-th year of use characterized Nera variety and the lowest part Amera variety. As concerning Phleum pratense variety the higher durability characterized Skrzeszowicka and SZD - 180.