پردیس کشاورزی و منابع طبیعی دانشگاه تهران Iranian Journal of animal Science 2008-4773 48 1 2017 05 22 Comparison of the effects of Zilmax® and different doses of Ajwain essential oil as β-agonist drugs on performance and serum biochemical metabolites in parental line of a commercial broiler Comparison of the effects of Zilmax® and different doses of Ajwain essential oil as β-agonist drugs on performance and serum biochemical metabolites in parental line of a commercial broiler 119 127 62340 10.22059/ijas.2017.99302.653188 FA Farhad Samadian Assistant Professor, Faculty of Agriculture, Yasuj University, Iran Armin Towhidi Associate Professor, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran Saeid Zeinodini Associate Professor, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran Mohammad Amir Karimi Torshizi Assistant Professor, Department of Poultry Science, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran Hossein Vaseghi Former M. Sc. Student, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran Journal Article 2014 05 02 This study was performed to investigate the effect of dietary supplementation with ajwain essential oil (EO) and zilmax^® on performance, carcass traits and serum biochemistry of chicks that were reared under different thermal programs. Another purpose of present study was to explore cold stress effects on above-mentioned parameters. This study were done according to a Complete Randomized Design with 8 treatment. For this purpose, Four dietary treatments (basal diet, dietary addition of ajwainEO at 150 and 450 ppm and zilmax^®at 1.6 ppm) each with corresponding replicates (24 replicate; n=192; one male chick in each individual cage as a replicate) were fed to chicks at two different thermal programming envirnment. The results showed that at normal temperature envirnment, dietary addition of zilmax^® and 450 ppm Ajwain EO, have increased plasma levels of triglycerides at the end of the growing phase (29 d) compared to control. Cold stress significantly decreased performance and ralitive weight of bursa (P>0.05). In conclusion, ajwain EO and and zilmax^®as a feed additive had no beneficial effects on performance and could not ameliorate the negative effects of cold stress on chicks. This study was performed to investigate the effect of dietary supplementation with ajwain essential oil (EO) and zilmax^® on performance, carcass traits and serum biochemistry of chicks that were reared under different thermal programs. Another purpose of present study was to explore cold stress effects on above-mentioned parameters. This study were done according to a Complete Randomized Design with 8 treatment. For this purpose, Four dietary treatments (basal diet, dietary addition of ajwainEO at 150 and 450 ppm and zilmax^®at 1.6 ppm) each with corresponding replicates (24 replicate; n=192; one male chick in each individual cage as a replicate) were fed to chicks at two different thermal programming envirnment. The results showed that at normal temperature envirnment, dietary addition of zilmax^® and 450 ppm Ajwain EO, have increased plasma levels of triglycerides at the end of the growing phase (29 d) compared to control. Cold stress significantly decreased performance and ralitive weight of bursa (P>0.05). In conclusion, ajwain EO and and zilmax^®as a feed additive had no beneficial effects on performance and could not ameliorate the negative effects of cold stress on chicks. https://ijas.ut.ac.ir/article_62340_7afc338b40826861b8b684b9efdabcb6.pdf