Abstract
In broiler nutrition, dietary fibre affects the development of the digestive system, nutrient absorption, intestinal flora and growth performance. The objective of this study was to evaluate the effect of orange seed powder (OSP) on growth performance, biochemical parameters, and the caecal bacterial population of broiler chickens. Four hundred and eighty-day-old Cobb 500 broiler chicks were divided into four treatment groups of six replicates. The treatment groups comprised a control group (without OSP supplementation) and three groups with varying levels of OSP supplementation (0.25%, 0.5%, and 0.75%) over 42 days. All groups supplemented with orange seed powder significantly decreased serum cholesterol, triglyceride concentrations, E. coli, and total coliform population as well as feed conversion ratio and feed intake and significantly increased average weight gain and lactobacillus population on day 21 (p < 0.05). Carcase yield did not differ across all the treatment groups (p > 0.05). On day 42, the triglyceride level was significantly superior (p < 0.05) with the supplementation of OSP. The lactobacillus population was not affected on day 42; however, E. coli and the total coliform population remained affected (p < 0.05). Orange seed powder at 0.50% supplementation in poultry feed can optimise the caeca bacterial population and enhance the weight gain and feed conversion ratio.
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