پردیس کشاورزی و منابع طبیعی دانشگاه تهران Iranian Journal of animal Science 2008-4773 47 4 2017 02 19 Effect of zinc oxid nanoparticle and Bacillus coagulans on performance, microbial population and blood parameters in broiler chickens Effect of zinc oxid nanoparticle and Bacillus coagulans on performance, microbial population and blood parameters in broiler chickens 489 498 61154 10.22059/ijas.2017.206445.653444 FA Mohammad Khajeh Bami M. Sc. Student, Department of Animal Science, Shahid Bahonar University of Kerman, Iran Mohsen Afsharmanesh Associate Professor, Department of Animal Science, Shahid Bahonar University of Kerman, Iran Journal Article 2016 05 07 This experiment was conducted to study the effect of zinc oxid nanoparticle and probiotic on performance, microbial population and blood parameters in broiler chickens (Ross 308). The experimental was done in a completely randomized design with 6 treatments, 4 replications and 12 chickens in each replication (288 chicks). The experimental treatments were 1) control diet with standard zinc oxid (100 mg/kg) 2) control diet plus 100 mg/kg probiotic, 3,4) basal diet plus 25 and 50 mg/kg zinc oxid nanoparticle, 5,6) basal diet plus 25 and 50 mg/kg zinc oxid nanoparticle plus probiotic. In the whole of experimental period, the using zinc oxid nanoparticle with probiotic significantly improved body weight and FCR compare to control group (<em>P</em><0.05). The colony counts of coliform and lactobacillus bacteria in chickens fed with 50 mg/kg zinc oxid nanoparticle along with probiotic were significantly lower and higher than control group respectivily (<em>P</em><0.05). Total protein and albumin in serum of chickens which received 50 mg/kg zinc oxid nanoparticle along with probiotic were significantly higher compare to control (<em>P</em><0.05). In conclusion, zinc oxid nanoparticle with probiotic caused an improvement in performance parameters and count of benefit microbial bacteria. This experiment was conducted to study the effect of zinc oxid nanoparticle and probiotic on performance, microbial population and blood parameters in broiler chickens (Ross 308). The experimental was done in a completely randomized design with 6 treatments, 4 replications and 12 chickens in each replication (288 chicks). The experimental treatments were 1) control diet with standard zinc oxid (100 mg/kg) 2) control diet plus 100 mg/kg probiotic, 3,4) basal diet plus 25 and 50 mg/kg zinc oxid nanoparticle, 5,6) basal diet plus 25 and 50 mg/kg zinc oxid nanoparticle plus probiotic. In the whole of experimental period, the using zinc oxid nanoparticle with probiotic significantly improved body weight and FCR compare to control group (<em>P</em><0.05). The colony counts of coliform and lactobacillus bacteria in chickens fed with 50 mg/kg zinc oxid nanoparticle along with probiotic were significantly lower and higher than control group respectivily (<em>P</em><0.05). Total protein and albumin in serum of chickens which received 50 mg/kg zinc oxid nanoparticle along with probiotic were significantly higher compare to control (<em>P</em><0.05). In conclusion, zinc oxid nanoparticle with probiotic caused an improvement in performance parameters and count of benefit microbial bacteria. https://ijas.ut.ac.ir/article_61154_9ebae3f52642310fbb9bc1fa8ab74aca.pdf