We studied the quality indices of the harvested green mass from romanian cultivars ‘Adela’ and ‘Marvla ‘ of tall fescue Festuca arundinacea grow in the experimental plot of the National Botanical Garden (Institute) “Alexandru Ciubotaru” MSU, Chisinau, R. Moldova. It has been determined that the dry matter of harvested whole plant in the second and third growing seasons from studied tall fescue contained 106-131 g/kg CP, 98-103 g/kg ash, 337-362 g/kg CF, 654-712 g/kg NDF, 338-410 g/kg ADF, 25-39 g/kg ADL, 316- 373 g/kg Cel, 278-313 g/kg HC, 44-161 g/kg TSS, with nutritive and energy value 57.0-62.5% DDM, 9.31-10.11 MJ/kg ME and 5.32-6.14 MJ/kg NEl. The tall fescue green masssubstrates used for anaerobic digestion have optimal C/N ratio, amount of lignin, hemicellulose and the biochemical methane potential of achieved 342-366 l/kg ODM.
