The evaluation of the biomass quality of Lolium perenne ‘Măgura’and Phleum pratense ‘Tirom’ grown under the conditions of Moldova [Articol]

Abstract

The primary objective of this study was to assess the quality indicators of green biomass harvested from monocultures of the perennial grasses Lolium perenne ‘Măgura’ and Phleum pratense ‘Tirom’, grown in the experimental field of the NBGI MSU in Chişinău. The study of the biochemical composition and nutritional value of the dry matter of green mass harvested from the investigated perennial grasses were defined by the following indicators: 86-95 g/kg crude protein, 97111 g/kg ash, 336-391 g/kg CF, 35.5-41.7 g/kg ADF, 633-734 g/kg NDF, 22-26 g/kg ADL, 65-181g/kg TSS, 9.22-9.92 MJ/kg metabolizable energy, and the net energy for lactation was calculated as 5.24-5.95 MJ/kg. The analyzed green biomass substrates intended for biogas production contained 33.3–39.1% cellulose (Cel), 27.8–31.7% hemicellulose (HC), and a carbon-to-nitrogen (C/N) ratio of 32–36. The estimated biochemical methane potential ranged from 324 to 339 L/kg of dry matter (DM). The Romanian cultivars of perennial grasses — Lolium perenne ‘Măgura’ and Phleum pratense ‘Tirom’— are versatile crops that can serve both as organic forage for livestock and as feedstock for biogas production facilities.