Use of organic acids in broiler diets
Abstract: This study was carried out to investigate the effects of feeding some organic acids on broiler performance. Two experiments were conducted. The aim of the first experiment was to evaluate six selected organic acids (OAs) being formic (0.25, 0.50 and 1.0% FA); fumaric (0.5, 1.0 and 1.5 % FDA); acetic (0.25, 0.5, and 0.75 %AC); citric (1, 2 and 3%CA); propionic (0.25, 0.5 and 1.0% PA) and butyric acids (0.1, 0.2 and 0.3% BA). The best type and level of the OAs used in the first experiment were evaluated through the second experiment which aimed at studying the effective use of FA at 0.5%, AC at 0.25%, BA at 0.2% and CA at 2% as mixtures. A total number of 513 (Exp.1) and 330 (Exp.2) one - day old Arbor Acres broiler chicks were randomly divided into 19 (Exp. 1) and 11 treatment groups (Exp. 2), each in 3 replicates. In both experiments, the first group was fed the basal diet without supplementation and served as a control treatment. While, the other groups received the basal diet supplemented with the tested organic acids. Each experiment was lasted when chicks were 42 day old. Performance, pH of different GIT segments, organ morphology, cecal bacteria, blood metabolites and nutrient digestibility were measured. In experiment l any of the tested OAs increased significantly body weight, weight gain, EPEI and improved FCR, compared to the control. .No great differences in mortality were observed among all the treatments. Dietary OAs improved nutrition digestibility of the experimental diets compared to the control. Dietary OAs significantly reduced the pH of different GIT segments compared to the control. Blood plasma content of Ca, P, TP and globulin were increased significantly by supplementing 0.5% FA, 0.5% FDA, 0.25% AC, 2%CA, 0.5% P A and 0.2% BA in the basal diet, compared to the control. Feeding dietary AC, CA, PA and BA led to sharp increase in ceca content of lactobacillus. Dietary 0.25% FA, O.5%FUA, 1% and 2% CA, 0.5% PA and BA at 0.1, 0.2 and 0.3% reduced E.coli count, compared to the control. Villus height was significantly increased by feeding all OAs. Moreover, relative weights of lymphoid organs of chicks fed OAs were significantly higher than the control.
In experiment 2, most of OAs mixtures improved body weight, weight gain, feed conversion ratio and EPEI, compared to the control. Dietary OAs mixtures improved nutrition digestibility of the experimental diets compared to the control. Dietary OAs mixtures significantly reduced the pH of different GIT segments compared to the control. Most of OAs mixtures increased significantly lactobacillus count and lowered significantly the population of the anaerobic and E. coli count of ceca. Blood plasma content of Ca, P, TP and globulin were increased significantly by feeding OAs mixtures, compared to the control. Relative weights of lymphoid organs of chicks fed OAs mixtures were mostly higher than the control.
In conclusion, 0.5% FA, 0.5% FUA, 0.25% AC, 2% CA, 0.5% P A and 0.2% BA as hi additives may enhance the growth performance and produce healthy broilers with a higher immune status to resist enteric pathogens and infectious diseases. Moreover, using OA as a single gives better result than mixtures.
Keywords: Organic acid, broiler, growth, digestibility, blood, pH, morphology, cecal.
Publication year 2011
Pages PP. 197
Availability location مكتبة معهد بحوث الانتاج الحيوانى-شارع نادى الصيد- الدقى- الجيزة
Availability number 1183
Organization Name
Country Egypt
Author(s) from ARC
Agris Categories Animal feeding
AGROVOC
TERMS		 Blood. Broiler chickens. Carcass composition. Digestibility. Economic analysis. Growth. Organic acids. Performance testing. Ph.
Proposed Agrovoc cecal;Digestabilities;European production efficiency;
Publication Type PhD Thesis
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