بررسی عملکرد و ارزش غذایی علوفه اکوتیپ‌های یونجه سردسیری

To evaluate quality and quantity yield of seventeen cold regions alfalfa ecotypes, this experiment was conducted in Randomized Complete Block Design (RCBD) with three replications in Karaj, for 2 years since 2009. Seventeen ecotypes were included in this study. According to combined analysis of variance, mean squares of ecotypes were significant at %1 probability level for fresh forage yield and dry forage yield. However mean squares of ecotype in year interaction were non-significant for fresh forage yield and dry forage yield. Also mean squares of ecotypes were significant for Neutral Detergent Fiber at %1 probability level and for Crude Protein, Dry Matter Digestibility, Organic Matter Digestibility and Ash at %5 probability levels. Ecotype in year interaction was significant for N.D.F. at %5 probability level and for D.M.D. and O.M.D. at %1 probability level. Also mean comparisons showed that the best ecotype for fresh forage yield and dry forage yield was Gharaaghaj with 61.3 and 16.4 t/h, respectively. Meanwhile, mean comparisons showed that the best ecotypes for C.P., N.D.F., A.D.F., D.M.D., O.M.D. and Ash were Chaleshtar with %17.73, Silvana with %50.43, Silvana with %35.33, Ordoubad with %62.98, Ordoubad with %59.89 and Silvana with %9.92, respectively. Totally, protein yield results showed the highest volumes were specified in Gharaaghaj with 2.79, Sahandava with 2.76 and Gharaghouzlou with 2.68 t/h.