Effect of the addition of humic substances as growth promoter in broiler chickens under two feeding regimens
Por:
Domínguez-Negrete A., Gómez-Rosales S., Angeles M.L., López-Hernández L.H., Souza T.C.R., López-García Y., Zavala-Franco A., Téllez-Isaias G.
Publicada:
1 ene 2019
Resumen:
Humic substances (HS) from different sources have been evaluated to replace or reduce the use of growth promoter antibiotics (GPA) in the feeds of broiler chickens. The objective was to evaluate the growth performance, tibia measurements, nutrient balance, meat quality, and microbiological status of broiler fed with an HS extract (EHS) under ad libitum (ADLIB) or feed restriction (REST). Individually caged broilers (n = 180, 14–35 day of age) were assigned to a factorial arrangement of three dietary treatments: (1) positive control with bacitracin methylene disalicylate (BMD) and salinomycin; (2) negative control without BMD nor salinomycin, and (3) same as negative control with 0.25% EHS, and two feeding regimens 1) ADLIB or REST for 24 h on d 1, 7, and 14. Results were subjected to ANOVA. Positive control and EHS-fed broilers showed higher carcass yield (p < 0.05) and lower oocyst excretion (p < 0.01) compared to negative control birds. Lactic acid bacteria (LAB) and Clostridium perfringens (C. perfringens) were higher in negative control and EHS-broilers compared to positive control (p < 0.01). In conclusion, higher carcass yield, lower C. perfringens and oocyst excretion were found in positive control and higher carcass yield, higher LAB and lower oocyst excretion were found in EHS-fed broilers. Broilers subjected to REST had reduced growth performance and meat quality. In conclusion, EHS could be used to increase the carcass yield and beneficial LAB in broilers. © 2019 by the authors. Licensee MDPI, Basel, Switzerland.
Filiaciones:
Domínguez-Negrete A.:
Faculty of Natural Sciences, Autonomous University of Queretaro, Av. de las Ciencias S/N, Juriquilla, Queretaro 76230, Mexico
Gómez-Rosales S.:
National Center of disciplinary Research in Animal Physiology and Genetics, INIFAP, Km 1 carretera a Colon AjuchitlánQueretaro 76280, Mexico
Angeles M.L.:
National Center of disciplinary Research in Animal Physiology and Genetics, INIFAP, Km 1 carretera a Colon AjuchitlánQueretaro 76280, Mexico
López-Hernández L.H.:
National Center of disciplinary Research in Animal Physiology and Genetics, INIFAP, Km 1 carretera a Colon AjuchitlánQueretaro 76280, Mexico
Souza T.C.R.:
Faculty of Natural Sciences, Autonomous University of Queretaro, Av. de las Ciencias S/N, Juriquilla, Queretaro 76230, Mexico
López-García Y.:
National Center of disciplinary Research in Animal Physiology and Genetics, INIFAP, Km 1 carretera a Colon AjuchitlánQueretaro 76280, Mexico
Zavala-Franco A.:
Center for Research and Advanced Studies of the National Polytechnic Institute, CINVESTAV-IPN, Real de JuriquillaQueretaro 76230, Mexico
Téllez-Isaias G.:
Department of Poultry Science, University of Arkansas, Fayetteville, AR 72701, United States
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