Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
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Article Citation - Scopus: 3Carcass Trait, Meat Lipid Profile and Meat Quality of Broiler Chickens Fed Diets Containing High Inclusion Level of High Quality Cassava (Manihot Esculenta) Peel Meal(Kassel University Press GmbH, 2024) Adebowale, T.O.; Oso, A.O.; Bamgbose, A.M.The current hike in price of conventional energy feedstuff warrants an intensified effort for a sustainable alternative that would not compromise performance and meat quality of poultry birds. The study evaluated the carcass trait and meat quality of finisher broiler chickens fed diets containing highly processed cassava peel meal at 50 % inclusion level in replacement of maize. Three hundred and twenty Cobb500 broiler chickens were allocated to 4 dietary treatments on a weight equalisation basis. Diet 1 = control diet (corn-soybean meal based diet) containing 4.0 g kg−1 digestible methionine (MET), 0.96 g kg−1 digestible lysine, diet 2 = diet containing 50 % replacement of maize in diet 1 with high quality cassava peel meal and containing 4.0 g kg−1 digestible MET, 0.96 g kg−1 digestible lysine, diets 3 and 4 are similar to diet 2 except with higher MET and lysine concentrations. Diet 3 contains 4.4 g kg−1 digestible MET, 1.02 g kg−1 digestible lysine, and diet 4 contains 4.8 g kg−1 digestible MET, 1.08 g kg−1 digestible lysine. The study lasted for 3 weeks (finisher phase). The highest slaughtered, carcass, and small intestinal weight were recorded in birds fed diet 2 while the birds fed diet 3 had the least abdominal fat value (p < 0.05). The water holding capacity and cooking loss percentage was highest in the meat of the chickens fed diet 4. The meat colour (redness, yellowness, and lightness) of chickens fed diet 4 recorded the highest value. The very low density of lipoprotein and triglyceride concentrations were least in the meat of chickens fed diet 2 (p < 0.05). It can be concluded that supplementation of methionine/lysine to high quality cassava peel meal improved the carcass trait and meat quality of the broiler chickens. © Author(s) 2024.Article Effect of Methionine and Lysine Supplementation on Performance and Intestinal Morphometrics of Finisher Broiler Chickens Fed Diets Containing Processed Cassava Peel Meal(CSIRO Publishing, 2025) Adebowale, T.O.; Arowolo, M.A.; Adekola, M.; Adeleye, T.; Oke, O.E.Context: The current high prices of conventional feedstuffs in developing countries seems to warrant intensified efforts to find sustainable alternatives to the major feed ingredients that would support performance without compromising gut health, reduce cost of production and promote a sustainable environment. Aims: The aim of the study is to evaluate the performance and health-related responses of finisher broiler chickens to the dietary replacement of corn with processed cassava peel meal (high- quality cassava peel meal) at 50% inclusion level, supplemented with methionine and lysine. Methods: Three hundred and twenty Cobb500 broiler chickens were allocated to four dietary treatments on a weight equalization basis. Each treatment was replicated eight times. A control diet based on corn and soybean meal was formulated to meet the recommended digestible methionine and lysine specification of 4.0 and 0.96 g kg−1respectively (VenCobb 500 Broiler Management Guide, Cobb-Vantress Inc., Siloam Spring, AR) for the finisher phase. The corn in the control diet was replaced with cassava peel meal at 50% replacement level in three other treatments (Diet 2–4). Diets 2–4 were then formulated to contain 100%, 112.5% and 125% of the recommended digestible methionine and 100%, 106.25% and 112.5% of the recommended digestible lysine, yielding 4.0, 4.4, and 4.8 g kg−1digestible methionine respectively, and 0.96, 1.02, and 1.08 g kg−1digestible lysine respectively, for the finisher phase. Key results: The highest bodyweight gain, improved feed conversion ratio and increased duodenal and jejunal villus height:crypt depth ratio was found in birds fed Diet 4. The lactobacillus count was highest in birds fed Diet 4 and total bacteria counts was highest in birds fed Diet 2. The feed cost per kilogram weight gain was least for the birds fed diets containing the processed cassava peel meal. However, morphological changes were observed in the liver and intestinal tissues of the birds. Conclusion: The study showed that the adequate supplementation of methionine and lysine to processed cassava peel meal can improve production performance of finisher broiler chickens but may not prevent morphological changes in the liver and intestine of the birds. Implication: The result implied that processed and fortified cassava peel meal can reduce high dependence on maize in the production of finisher broiler chickens, while mitigating the enviromental challenges associated with the disposal of the agrowaste. The morphological changes in the liver and intestine of the birds require further investigation. © 2025 Elsevier B.V., All rights reserved.