Document Type : Research Paper
Authors
Abstract
This experiment was conducted to evaluate the effects of physical form, barley variety and enzyme addition on Ileal digestibility, apparent metabolizable energy (AME) and energy efficiency of broiler chickens.The experiment was carried using a factorial experiment with a completely randomized desiegn. Factors were barley varity (Fajr, Reyhaneh, and Yosef), diet form (mash or pellet) and enzyme level (0 and 0/05 g/kg dry matter). Here 927 one day-old Ross 308 broiler chickens were assigned to 12 treatments, 3 replicates and 27 chickens in each replicate. The results of experiment indicated that the digestibility of nutrients, AME, apparent metabolizable energy corrected to zero nitrogen retention (AMEn) and energy efficiencies (NE/AMEn) affected by barley variety (p <0/05). Net Energy (NE) affected by main and interaction effects (P < 005). Diets containing Ryhaneh barley variety in comparison with other varietys, increased Ileal Digestibel Protein (IDP), Ileal Digestibel fat (IDF), NE, AME and AMEn (P <0/05). Although pelleting decreased Ileal Digestibility of nutrients (p>005), NE, AME and AMEn (p <0/05), addition of enzyme to diet increased this indicators (P <0/050). According to these results, the use of pellet diet containing Ryhaneh variety with enzyme improved digestibility and energy efficiency and thus it's recommended to be used in poultry nutrition.
Keywords
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