Published in Scientific Papers. Series A. Agronomy, Vol. LXVII, Issue 1
Written by Victor ŢÎŢEI
The main objective of this research was to evaluate the quality indices of green mass, hay, silage and straw from the local ecotype of tall oatgrass, Arrhenatherum elatius, grown in monoculture in the experimental plot of NBGI, Chisinau, Republic of Moldova. The results revealed that the harvested green mass contained 25.0-29.8% dry matter. The dry matter of the whole plant contained 80 g/kg CP6yy, 382 g/kg CF, 83 g/kg ash, 411 g/kg ADF, 710 g/kg NDF, 38 g/kg ADL,118 g/kg TSS, 373 g/kg Cel, 299 g/kg HC, with nutritive and energy value 58.2% DMD, 51.3% DOM, 9.29 MJ/kg ME and 5.31 MJ/kg NEl. The biochemical composition, nutritive and energy value of tall oatgrass hay: 77 g/kg CP, 414 g/kg CF, 80 g/kg ash, 436 g/kg ADF, 740 g/kg NDF, 40 g/kg ADL, 98 g/kg TSS, 396 g/kg Cel and 304 g/kg HC, 9.00 MJ/kg ME and 5.02 MJ/kg NEl. The tall oatgrass fermented fodder- silage is characterized by pH = 4.26, 5.9 g/kg acetic acid, 18.3 g/kg lactic acid and free of butyric acid, 88 g/kg CP, 405 g/kg CF, 100 g/kg ash, 420 g/kg ADF, 724 g/kg NDF, 26 g/kg ADL, 74 g/kg TSS, 394 g/kg Cel, 304 g/kg HC, with nutritive and energy value 56.5% DMD, 9.19 MJ/kg ME, 5.21 MJ/kg NEl. The tall oatgrass straw contained 50 g/kg CP, 51 g/kg ADL, 85 g/kg TSS, 405 g/kg Cel, 286 g/kg HC. The tall oatgrass substrates used for anaerobic digestion have optimal amount of lignin and hemicellulose, the estimated biochemical methane potential varied from 341 to 361 l/kg VS. The tall oatgrass straw and hay may be used as feedstock for the production by cellulosic ethanol, the estimated theoretical ethanol yield from cell wall carbohydrates averaged 507-509 L/t.
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