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...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Universidad de Antioquia
2019-07-01
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| Series: | Revista Colombiana de Ciencias Pecuarias |
| Subjects: | |
| Online Access: | https://revistas.udea.edu.co/index.php/rccp/article/view/336763 |
| _version_ | 1818346456811044864 |
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| 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 |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-13T17:18:34Z |
| format | Article |
| id | doaj.art-f1b92554bc2849e9868e71e1c5d70818 |
| institution | Directory Open Access Journal |
| issn | 2256-2958 |
| language | English |
| last_indexed | 2024-12-13T17:18:34Z |
| publishDate | 2019-07-01 |
| publisher | Universidad de Antioquia |
| record_format | Article |
| series | Revista Colombiana de Ciencias Pecuarias |
| spelling | doaj.art-f1b92554bc2849e9868e71e1c5d708182022-12-21T23:37:23ZengUniversidad de AntioquiaRevista Colombiana de Ciencias Pecuarias2256-29582019-07-0132318419110.17533/udea.rccp.v32n3a0335402Dietary β-mannanase decreases cloacal temperature of broiler chickens under hot conditions without affecting growth performanceTae Sung Yang0Moon Chan Kim1Franco Martinez Pitargue2Hyeon Seok Choi3Dong Yong Kil4Chung-Ang UniversityChung-Ang UniversityChung-Ang UniversityChung-Ang UniversityChung-Ang UniversityBackground: 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.https://revistas.udea.edu.co/index.php/rccp/article/view/336763blood traitsβ-mannanasebroilerfeed enzymesgrowth performanceheat stresslymphoid organs |
| spellingShingle | 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 Revista Colombiana de Ciencias Pecuarias blood traits β-mannanase broiler feed enzymes growth performance heat stress lymphoid organs |
| title | 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_short | 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 |
| topic | blood traits β-mannanase broiler feed enzymes growth performance heat stress lymphoid organs |
| url | https://revistas.udea.edu.co/index.php/rccp/article/view/336763 |
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