肉鸡
胆钙化醇
动物科学
磷
钙
体重增加
营养物
开胃菜
矿化(土壤科学)
化学
饲料转化率
体重
内分泌学
内科学
生物
医学
食品科学
有机化学
氮气
作者
Abdul Jabbar,Muhammad Tahir,Shabana Naz,Abdulwahed Fahad Alrefaei,Asad Sultan,Samia M. AbdelRahaman,Maria Selvaggi
标识
DOI:10.1080/09712119.2024.2337177
摘要
We hypothesized that both performance and bone mineralization would show improvements when cholecalciferol supplementation was increased above the recommended NRC (1994) [Nutrient requirements of poultry, 9th rev. ed. Washington, DC: National Academy Press] level. In this study, male Ross 308 chickens (n = 540) were supplemented with diets containing either a low level of 200 IU/kg or a higher dose of 5,000 IU/kg of cholecalciferol (VD). The results showed that during the starter phase, weight gain was significantly higher in VD5000 and the control compared to VD0, with significantly lower feed intake in VD0. Consequently, FCR was significantly better in VD200 and VD5000 compared to VD0. In the finisher phase, weight gain, feed intake, and FCR were significantly higher in VD200 and VD5000 compared to VD0. Tibia ash, Ca, and P were significantly higher in VD5000 compared to VD200. Carcass weight was significantly higher in VD200 and VD5000 compared to VD0. Total tract N retention and GE were significantly higher in VD5000 compared to VD0. The study concludes that cholecalciferol supplementation at 5000 IU/kg enhances growth performance, tibia mineralization, and nutrient digestibility in broilers fed with 30% reduced Ca and P in their diets.
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