%0 Journal Article %T Relative effectiveness of herbal methionine compared to DLmethionine on growth, performance and carcass responses basis in broiler chickens %J Iranian Journal of Veterinary Medicine %I University of Tehran %Z 2251-8894 %A Hadinia, Sheila %A Shivazad, Mahmood %A Moravej, Hossein %A Alahyari-Shahrasb, Majid %D 2013 %\ 07/01/2013 %V 7 %N 2 %P 95-101 %! Relative effectiveness of herbal methionine compared to DLmethionine on growth, performance and carcass responses basis in broiler chickens %K herbal methionine %K broiler %K Carcass %K bioefficacy %R 10.22059/ijvm.2013.35062 %X BACKGROUND: The degree to which the amount of aningested nutrient is absorbed and available to the body is calledbioavailability. OBJECTIVES: Relative effectiveness of herbalmethionine (H-Met®) compared to DL-methionine (DL-Met)was investigated in this experiment. METHODS: Exponentialregression analysis was used to determine bioefficacy of H-Met®based on body weight gain, feed intake and feed conversion. DLMetand H-Met® were added to a basal diet in 3 and 4 levels,respectively, in starter, grower and finisher periods. Therefore,that met the nutrient and energy requirements of broiler chickens,with the exception of Met+Cys. RESULTS: In the 42-d trial,broilers growth increased significantly (p<0.05), relative tothose broilers fed basal diet, regardless of Met sources. Carcasscharacteristics did not respond significantly to the supplementalMet. CONCLUSIONS: Regression analysis revealed that H-Met®was 52% (body weight gain), 72% (feed intake) and 77% (feedconversion ratio) as efficacious as DL-Met. H-Met® can beadministered as a new and a natural source of Met in poultryindustry. %U https://ijvm.ut.ac.ir/article_35062_3a2b45bfaf8aa56311ec42d106344d73.pdf