Effect of in ovo Feeding and Dietary Feeding of Silybum marianum Extract on Performance, Immunity and Blood Cation-Anion Balance of Broiler Chickens Exposed to High Temperatures

Authors

  • A. Zarei Department of Animal Science, Faculty of Agriculture and Natural Resources, Karaj Branch, Islamic Azad University, Karaj, Iran
  • A.A. Sadeghi Department of Animal Science, Faculty of Agriculture and Natural Resources, Science and Research Branch, Islamic Azad University, Tehran, Iran
  • M. Chamani Department of Animal Science, Faculty of Agriculture and Natural Resources, Science and Research Branch, Islamic Azad University, Tehran, Iran
  • M. Morovat Young Researchers and Elite Club, Science and Research Branch, Islamic Azad University, Tehran, Iran
  • P. Dadvar Department of Animal Science, Ramin Agricultural and Natural Resources University, Mollasani, Ahvaz, Iran
Abstract:

This experiment was conducted to investigate the effect of in ovo feeding (IOF) and dietary feeding of Silybum marianum (SM) extract on the immunity of chicken under heat stress conditions. A total of 360 fertile eggs from a commercial broiler breeder (Ross-308) farm was used for in ovo feeding of 0, 100 and 200 mg/L SM water extract at day 17.5 of incubation. After hatching, 240 chicks were transferred to the experimental cages. Two types of diet were used; one of them without extract and the other one containing 100 mg/kg of SM extract. Then chicks were exposed to elevated temperatures 4 ˚C above optimum from 7 to 28 days of age for 4 h daily and then they were kept at the optimum temperature. The chicks were divided into six treatments with four replicates as a completely randomized design with 2 × 3 factorial arrangement. The results showed that chicks fed diet containing the extract had the highest feed intake, daily weight gain and final body weight and lowest feed conversion ratio (P

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Journal title

volume 6  issue 3

pages  697- 705

publication date 2016-09-01

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