This study was conducted during the 2020-2021 growing season at the experimental field of the Department of Field Crops, Faculty of Agriculture, Kahramanmaraş Sütçü İmam University. The objective was to evaluate the adaptation, herbage yield, and forage quality of selected barley (Hordeum vulgare L.) varieties under the ecological conditions of Kahramanmaraş province. Ten barley cultivars (Compagne, Ibaona, Arconda, Yalın, Çetin 2000, Asil, Aydan Hanım, Bozlak, Misket, and Akar) were used in the experiment. The experiment was arranged in a randomized complete block design (RCBD) with three replications. The results revealed no statistically significant differences among the varieties for the traits evaluated, except for crude ash content. Green herbage yield ranged from 1046 to 1506 kg/da, while dry herbage yield varied between 334 and 484 kg/da. Dry matter content ranged from 29.66% to 33.30%, crude protein content from 11.9% to 14.0%, and crude ash content from 6.48% to 8.67%. Neutral detergent fiber (NDF) and acid detergent fiber (ADF) ratios ranged from 62.30% to 68.17% and 32.05% to 36.58%, respectively. Digestible dry matter (DDM) values ranged from 59.58% to 64.42%, dry matter intake (DMI) from 1.76% to 1.93%, and relative feed value (RFV) from 83.28 to 95.34. Among the cultivars, Compagne had ...
