پردیس کشاورزی و منابع طبیعی دانشگاه تهران Iranian Journal of animal Science 2008-4773 56 4 2025 12 22 Effect of processed corn on performance, immune response and nutrients digestibility in Arian broiler chicken Effect of processed corn on performance, immune response and nutrients digestibility in Arian broiler chicken 753 765 101788 10.22059/ijas.2025.386269.654047 FA Fatemeh Kamalzadeh Department of Animal Science, Faculty of Agriculture, University of Zanjan, Zanjan, Iran Hamid Reza Taheri Department of Animal Science, Faculty of Agriculture, University of Zanjan, Zanjan, Iran Seyed Abdullah Hosseini Department of Animal and Poultry Nutrition and Physiology, Animal Science Research Institute of Iran, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran. Amir Hossein Alizadeh-Ghamsari Department of Animal and Poultry Nutrition and Physiology, Animal Science Research Institute of Iran, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran Journal Article 2024 12 02 In this study, 750 Arian broiler chickens were used in a completely randomized design with five treatments, five replicates and 30 chicks per each replicate from 1 to 40 d of age. The experimental treatments contained 0%, 25%, 50%, 75% and 100% processed corn instead of unprocessed corn in the diet. The processed corn was prepared prior to this experiment through several processing steps including fermentation, cooking and infrared irradiation. All diets were formulated based on the recommendations of the Arian guideline and were nutritionally identical. The results showed that the use of processed corn throughout the rearing period (1 to 40 d of age) had no effect on growth performance, carcass characteristics, blood biochemical traits and antibody titers against sheep red blood cells and Newcastle disease virus. Nevertheless,observations at specific time points indicated that, increasing the level of processed corn at 35 days of age led to a linear and quadratic improvement in body weight and feed conversion ratio, while feed intake improved quadratically from 1 to 28 days of age. Additionally, a higher relative breast weight was observed in a linear and quadratic manner. leal digestibility of protein and energy, as well as antibody titer against influenza, increased linearly and quadratically with higher levels of processed corn in the diet (P<0.05). Overall, Processing corn positively affected growth at certain points, with 75% replacement showing better results than other levels. In this study, 750 Arian broiler chickens were used in a completely randomized design with five treatments, five replicates and 30 chicks per each replicate from 1 to 40 d of age. The experimental treatments contained 0%, 25%, 50%, 75% and 100% processed corn instead of unprocessed corn in the diet. The processed corn was prepared prior to this experiment through several processing steps including fermentation, cooking and infrared irradiation. All diets were formulated based on the recommendations of the Arian guideline and were nutritionally identical. The results showed that the use of processed corn throughout the rearing period (1 to 40 d of age) had no effect on growth performance, carcass characteristics, blood biochemical traits and antibody titers against sheep red blood cells and Newcastle disease virus. Nevertheless,observations at specific time points indicated that, increasing the level of processed corn at 35 days of age led to a linear and quadratic improvement in body weight and feed conversion ratio, while feed intake improved quadratically from 1 to 28 days of age. Additionally, a higher relative breast weight was observed in a linear and quadratic manner. leal digestibility of protein and energy, as well as antibody titer against influenza, increased linearly and quadratically with higher levels of processed corn in the diet (P<0.05). Overall, Processing corn positively affected growth at certain points, with 75% replacement showing better results than other levels. https://ijas.ut.ac.ir/article_101788_460df1a00cba8e15df8f35e800660b8d.pdf