Effect of the Addition of Humic Substances as Growth Promoter in Broiler Chickens Under Two Feeding Regimens

Autor:	Yair López-García, María de Lourdes Angeles, Anai Zavala-Franco, Guillermo Tellez-Isaias, Tercia Cesaria Reis-de Souza, Alejandra Domínguez-Negrete, Sergio Gómez-Rosales, Luis Humberto López-Hernández
Jazyk:	angličtina
Rok vydání:	2019
Předmět:	animal structures productivity animal diseases Bacitracin medicine.disease_cause Article Excretion 03 medical and health sciences chemistry.chemical_compound Clostridium Animal science Lactobacillus medicine coccidian oocysts Salinomycin 030304 developmental biology 0303 health sciences General Veterinary biology broilers humic substances digestive oral and skin physiology 0402 animal and dairy science Broiler food and beverages 04 agricultural and veterinary sciences Clostridium perfringens biology.organism_classification 040201 dairy & animal science Lactic acid lactobacillus chemistry Animal Science and Zoology clostridium medicine.drug
Zdroj:	Animals Volume 9 Issue 12 Animals : an Open Access Journal from MDPI
ISSN:	2076-2615
DOI:	10.3390/ani9121101
Popis:	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&ndash 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.
Databáze:	OpenAIRE
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