Growth and Carcass Performance in Broiler Chickens Supplemented with β-Glucanase from Aerobic Fungi <I>Aspergillus Niger</I> and <I>Trichoderma Longibrachiatum</I>

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  • Growth and carcass performance in broiler chickens supplemented with β-glucanase from aerobic fungi aspergillus niger and Trichoderma longibrachiatum
  • Growth and carcass performance in broiler chickens supplemented with v glucanase from aerobic fungi aspergillus niger and Trichoderma longibrachiatum
  • Growth and Carcass Performance in Broiler Chickens Supplemented with &beta;-Glucanase from Aerobic Fungi <I>Aspergillus Niger</I> and <I>Trichoderma Longibrachiatum</I>

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Abstract

A variety of factors can affect feed efficiency in poultry; among them is β-Glucan. β-Glucan in feeds is often poorly digest and has deleterious effects on nutrient absorption. Supplementation of diets with proper enzyme can enhance nutrient digestion and absorption. The aim of this study was β-Glucanase production from Aspergillus niger and Trichoderma longibrachiatum (GPβ-Glucanase), as well as its in vitro and in vivo assessment. Yeast biomass was produced using Zapek medium with Glucose and inoculated in Erlenmeyer flasks (repressed conditions) with above fungi. The mycelia then transferred to Erlenmeyer flasks containing Zapek medium supplemented with 2% barely β-Glucan and incubated (induction conditions), and enzyme recovered from the medium. The mean activities of GPβ-Glucanase and commercial β-Glucanase from Bacillus subtillis (ZYβ-Glucanase) were recorded as 1348±5.12 and 1251±5.31BGU1/g respectively. Chick model was used for in vivo assessment. 540 Broiler chicks were fed one of nine diets in a 3×3 factorial arrangement from 1 to 49 days of age. The factors were: enzyme addition (0, ZYβ-Glucanase and GPβ-Glucanase) and level of hull-less barley (HB) in diet (0, 40, and 60%). The results showed that supplementation of diets containing 40% HB either with commercial or produced enzyme led to significant (P<0.05) increase in weight gain and feed intake, whereas significant (P<0.05) decrease feed efficiency, however no significant differences were observed between two kinds of enzyme. Conclusion was that GPβ-Glucanase is of great potential and comparable to ZYβ-Glucanase for β-Glucan hydrolysis.

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