THE PRODUCTIVITY AND THE QUALITY OF GREEN MASS AND HAY FROM ROMANIAN CULTIVARS OF FESTUCA ARUNDINACEA , GROWN IN THE REPUBLIC OF MOLDOVA

摘要

Grasses are considered as one of the most important sources in low cost feed for for animals, but alsoa substrate for the production of renewable energy. We studied the quality of the freshly harvestedbiomass and hay of Romanian cultivars of tall fescue Festuca arundinacea : Adela '', Brio '', M?gurele5 '', created at the Research and Development Institute for Grasslands , Romania and cultivatedin the experimental plot of the National Botanical Garden (Institute) “ Alexandru Ciubotaru ”, Chisinau,Repu blic of Moldova . The samples for assessment were taken in the 2 nd year of growth, when the plantswere cut for the 1 st time. The amount of dry matter (DM), crude protein (CP), crude ash (CA), neutraldetergent fiber (NDF), acid detergent fiber (ADF), acid detergent lignin (ADL), cellulose (Cel),hemicellulose (HC), digestible dry matter (DDM), organic matter digestibility (OMD), relative feedvalue (RFV), th e metabolizable energy (ME), the net energy for lactation (NEl), biomethane productionpotential (BMP) were analyzed. It has been determined that the green mass productivity of the tallfescue cultivars achieved 30.83 36. 96 t/ha, the dry matter contained 1 14 136 g/kg CP, 74 89 g/kg CA,582 593 g/kg NDF, 392 396 g/kg ADF, 34 41 g/kg ADL, 322 329 g/kg Cel, 226 229 g/kg HC, 60.363.8% DDM and 57.2 62.2% OMD, 9.12 9.62 MJ/kg ME and 5.69 5.86 MJ/kg NEl; the hay dry mattercontained 99 117 g/kg CP, 80 86 g/kg CA , 582 593 g/kg NDF, 356 366 g/kg ADF, 34 37 g/kg ADL,351 356 g/kg Cel, 236 260 g/kg HC, 55.8 57.2% DDM and 51.4 53.3% OMD, 9.51 9.59 MJ/kg MEand 5.53 5.59 MJ/kg NEl, this fact indicates a optimal quality of the roughage feed for ruminants. Thesubstrate for the anaerobic digestion, consisting of fresh mass of tall fescue, had a biomethaneproduction potential of 349 354 L/kg of organic matter. The studied cultivars of tall fescue could beused in the Republic of Moldova for the restoration of degraded per manent grasslands, as a componentof the mix of grasses for the creation of temporary grasslands and can be planted between rows invineyards and orchards. Besides, the obtained biomass can be used as feed for animals or as substrateat biomethane producti on plants plants.