Dietary β-mannanase decreases cloacal temperature of broiler chickens under hot conditions without affecting growth performance

Background: High amounts of nonstarch polysaccharides in the diet may increase the amounts of fermentative materials in the hindgut, leading to an increase in fermentative heat production. Dietary β-mannanase is reported to decrease antinutritional effects of β-mannans, such as the potential increas...

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Autores principales:	Tae Sung Yang, Moon Chan Kim, Franco Martinez Pitargue, Hyeon Seok Choi, Dong Yong Kil
Formato:	article
Lenguaje:	EN
Publicado:	Universidad de Antioquia 2019
Materias:	blood traits β-mannanase broiler feed enzymes growth performance heat stress lymphoid organs Animal culture SF1-1100
Acceso en línea:	https://doaj.org/article/f1b92554bc2849e9868e71e1c5d70818
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spelling	oai:doaj.org-article:f1b92554bc2849e9868e71e1c5d708182021-12-01T18:49:31ZDietary β-mannanase decreases cloacal temperature of broiler chickens under hot conditions without affecting growth performance2256-295810.17533/udea.rccp.v32n3a03https://doaj.org/article/f1b92554bc2849e9868e71e1c5d708182019-07-01T00:00:00Zhttps://revistas.udea.edu.co/index.php/rccp/article/view/336763https://doaj.org/toc/2256-2958Background: High amounts of nonstarch polysaccharides in the diet may increase the amounts of fermentative materials in the hindgut, leading to an increase in fermentative heat production. Dietary β-mannanase is reported to decrease antinutritional effects of β-mannans, such as the potential increase of body heat; however, its efficacy on broiler chickens raised under hot climatic conditions has not been investigated. Objective: To investigate the effects of dietary β-mannanase on growth performance, cloacal temperature, relative lymphoid organ weight, and blood characteristics of broiler chickens raised under hot climatic conditions. Methods: A total of 1,701 1-day-old Ross 308 broiler chickens were randomly allotted to one of three dietary treatments with nine replicates. A basal diet was prepared and added with β-mannanase at 0.05 or 0.10% inclusion levels. The experiment was conducted for 30 days. Average room temperature was 28.8 ± 1.74 ̊C and average relative humidity (RH) was 76.1 ± 11.49% during the experiment. Results: Growth performance of broiler chickens raised under hot climatic conditions was not affected by β-mannanase inclusion. Cloacal temperature decreased at the end of experiment (linear, p<0.05) with increasing inclusion levels of dietary β-mannanase. Increasing inclusion levels of β-mannanase tended to increase (linear, p=0.076) the relative weight of thymus, but had no effects on the relative weight of spleen and bursa of Fabricius. Blood characteristics were not influenced by dietary β-mannanase. Conclusion: Increasing inclusion levels of β-mannanase decrease cloacal temperature; however, it does not directly influence growth performance nor alleviates the heat stress of broiler chickens raised under hot climatic conditions.Tae Sung YangMoon Chan KimFranco Martinez PitargueHyeon Seok ChoiDong Yong KilUniversidad de Antioquiaarticleblood traitsβ-mannanasebroilerfeed enzymesgrowth performanceheat stresslymphoid organsAnimal cultureSF1-1100ENRevista Colombiana de Ciencias Pecuarias, Vol 32, Iss 3, Pp 184-191 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	blood traits β-mannanase broiler feed enzymes growth performance heat stress lymphoid organs Animal culture SF1-1100
spellingShingle	blood traits β-mannanase broiler feed enzymes growth performance heat stress lymphoid organs Animal culture SF1-1100 Tae Sung Yang Moon Chan Kim Franco Martinez Pitargue Hyeon Seok Choi Dong Yong Kil Dietary β-mannanase decreases cloacal temperature of broiler chickens under hot conditions without affecting growth performance
description	Background: High amounts of nonstarch polysaccharides in the diet may increase the amounts of fermentative materials in the hindgut, leading to an increase in fermentative heat production. Dietary β-mannanase is reported to decrease antinutritional effects of β-mannans, such as the potential increase of body heat; however, its efficacy on broiler chickens raised under hot climatic conditions has not been investigated. Objective: To investigate the effects of dietary β-mannanase on growth performance, cloacal temperature, relative lymphoid organ weight, and blood characteristics of broiler chickens raised under hot climatic conditions. Methods: A total of 1,701 1-day-old Ross 308 broiler chickens were randomly allotted to one of three dietary treatments with nine replicates. A basal diet was prepared and added with β-mannanase at 0.05 or 0.10% inclusion levels. The experiment was conducted for 30 days. Average room temperature was 28.8 ± 1.74 ̊C and average relative humidity (RH) was 76.1 ± 11.49% during the experiment. Results: Growth performance of broiler chickens raised under hot climatic conditions was not affected by β-mannanase inclusion. Cloacal temperature decreased at the end of experiment (linear, p<0.05) with increasing inclusion levels of dietary β-mannanase. Increasing inclusion levels of β-mannanase tended to increase (linear, p=0.076) the relative weight of thymus, but had no effects on the relative weight of spleen and bursa of Fabricius. Blood characteristics were not influenced by dietary β-mannanase. Conclusion: Increasing inclusion levels of β-mannanase decrease cloacal temperature; however, it does not directly influence growth performance nor alleviates the heat stress of broiler chickens raised under hot climatic conditions.
format	article
author	Tae Sung Yang Moon Chan Kim Franco Martinez Pitargue Hyeon Seok Choi Dong Yong Kil
author_facet	Tae Sung Yang Moon Chan Kim Franco Martinez Pitargue Hyeon Seok Choi Dong Yong Kil
author_sort	Tae Sung Yang
title	Dietary β-mannanase decreases cloacal temperature of broiler chickens under hot conditions without affecting growth performance
title_short	Dietary β-mannanase decreases cloacal temperature of broiler chickens under hot conditions without affecting growth performance
title_full	Dietary β-mannanase decreases cloacal temperature of broiler chickens under hot conditions without affecting growth performance
title_fullStr	Dietary β-mannanase decreases cloacal temperature of broiler chickens under hot conditions without affecting growth performance
title_full_unstemmed	Dietary β-mannanase decreases cloacal temperature of broiler chickens under hot conditions without affecting growth performance
title_sort	dietary β-mannanase decreases cloacal temperature of broiler chickens under hot conditions without affecting growth performance
publisher	Universidad de Antioquia
publishDate	2019
url	https://doaj.org/article/f1b92554bc2849e9868e71e1c5d70818
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Dietary β-mannanase decreases cloacal temperature of broiler chickens under hot conditions without affecting growth performance

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