Effect of dietary β-mannanase on productive performance, egg quality, and utilization of dietary energy and nutrients in aged laying hens raised under hot climatic conditions
Objective The objective of this experiment was to investigate the effect of dietary β-mannanase on productive performance, egg quality, and utilization of dietary energy and nutrients in aged laying hens raised under hot climatic conditions. Methods A total of 320 84-wk-old Hy-line Brown aged laying...
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| Format: | Article |
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Asian-Australasian Association of Animal Production Societies
2017-10-01
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| Series: | Asian-Australasian Journal of Animal Sciences |
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| Online Access: | http://www.ajas.info/upload/pdf/ajas-30-10-1450.pdf |
| _version_ | 1811283183793078272 |
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| author | Moon Chan Kim Jong Hyuk Kim Franco Martinez Pitargue Do Yoon Koo Hyeon Seok Choi Dong Yong Kil |
| author_facet | Moon Chan Kim Jong Hyuk Kim Franco Martinez Pitargue Do Yoon Koo Hyeon Seok Choi Dong Yong Kil |
| author_sort | Moon Chan Kim |
| collection | DOAJ |
| description | Objective The objective of this experiment was to investigate the effect of dietary β-mannanase on productive performance, egg quality, and utilization of dietary energy and nutrients in aged laying hens raised under hot climatic conditions. Methods A total of 320 84-wk-old Hy-line Brown aged laying hens were allotted to one of four treatments with eight replicates in a completely randomized design. Two dietary treatments with high energy (HE; 2,800 kcal/kg nitrogen-corrected apparent metabolizable energy [AMEn]) and low energy (LE; 2,700 kcal/kg AMEn) were formulated. Two additional diets were prepared by adding 0.04% (MN4) or 0.08% β-mannanase (MN8) to LE treatment diets. The feeding trial was conducted for 28 d, covering a period from July to August in South Korea. The average daily room temperature and relative humidity were 29.2°C and 83%, respectively. Results Productive performance, egg quality, and cloacal temperature were not influenced by dietary treatments. The measured AMEn values for MN8 diets were similar to those for HE diets, which were greater (p<0.05) than those for LE and MN4 diets. However, the AMEn values for MN8 diets did not differ from those for LE and MN4 diets. Conclusion The addition of β-mannanase to low energy diets increases energy values for diets fed to aged laying hens. However, this increase has little positive impacts on performance and egg quality. These results indicate that dietary β-mannanase does not mitigate the heat stress of aged laying hens raised under hot climatic conditions. |
| first_indexed | 2024-04-13T02:06:54Z |
| format | Article |
| id | doaj.art-15cac235609045a083b548fcb724f922 |
| institution | Directory Open Access Journal |
| issn | 1011-2367 1976-5517 |
| language | English |
| last_indexed | 2024-04-13T02:06:54Z |
| publishDate | 2017-10-01 |
| publisher | Asian-Australasian Association of Animal Production Societies |
| record_format | Article |
| series | Asian-Australasian Journal of Animal Sciences |
| spelling | doaj.art-15cac235609045a083b548fcb724f9222022-12-22T03:07:26ZengAsian-Australasian Association of Animal Production SocietiesAsian-Australasian Journal of Animal Sciences1011-23671976-55172017-10-0130101450145510.5713/ajas.17.026923793Effect of dietary β-mannanase on productive performance, egg quality, and utilization of dietary energy and nutrients in aged laying hens raised under hot climatic conditionsMoon Chan Kim0Jong Hyuk Kim1Franco Martinez Pitargue2Do Yoon Koo3Hyeon Seok Choi4Dong Yong Kil5 Department of Animal Science and Technology, Chung-Ang University, Anseong 17546, Korea Department of Animal Science and Technology, Chung-Ang University, Anseong 17546, Korea Department of Animal Science and Technology, Chung-Ang University, Anseong 17546, Korea Department of Animal Science and Technology, Chung-Ang University, Anseong 17546, Korea Department of Animal Science and Technology, Chung-Ang University, Anseong 17546, Korea Department of Animal Science and Technology, Chung-Ang University, Anseong 17546, KoreaObjective The objective of this experiment was to investigate the effect of dietary β-mannanase on productive performance, egg quality, and utilization of dietary energy and nutrients in aged laying hens raised under hot climatic conditions. Methods A total of 320 84-wk-old Hy-line Brown aged laying hens were allotted to one of four treatments with eight replicates in a completely randomized design. Two dietary treatments with high energy (HE; 2,800 kcal/kg nitrogen-corrected apparent metabolizable energy [AMEn]) and low energy (LE; 2,700 kcal/kg AMEn) were formulated. Two additional diets were prepared by adding 0.04% (MN4) or 0.08% β-mannanase (MN8) to LE treatment diets. The feeding trial was conducted for 28 d, covering a period from July to August in South Korea. The average daily room temperature and relative humidity were 29.2°C and 83%, respectively. Results Productive performance, egg quality, and cloacal temperature were not influenced by dietary treatments. The measured AMEn values for MN8 diets were similar to those for HE diets, which were greater (p<0.05) than those for LE and MN4 diets. However, the AMEn values for MN8 diets did not differ from those for LE and MN4 diets. Conclusion The addition of β-mannanase to low energy diets increases energy values for diets fed to aged laying hens. However, this increase has little positive impacts on performance and egg quality. These results indicate that dietary β-mannanase does not mitigate the heat stress of aged laying hens raised under hot climatic conditions.http://www.ajas.info/upload/pdf/ajas-30-10-1450.pdfAged Laying Henβ-MannanaseEgg QualityHot Climatic ConditionPerformance |
| spellingShingle | Moon Chan Kim Jong Hyuk Kim Franco Martinez Pitargue Do Yoon Koo Hyeon Seok Choi Dong Yong Kil Effect of dietary β-mannanase on productive performance, egg quality, and utilization of dietary energy and nutrients in aged laying hens raised under hot climatic conditions Asian-Australasian Journal of Animal Sciences Aged Laying Hen β-Mannanase Egg Quality Hot Climatic Condition Performance |
| title | Effect of dietary β-mannanase on productive performance, egg quality, and utilization of dietary energy and nutrients in aged laying hens raised under hot climatic conditions |
| title_full | Effect of dietary β-mannanase on productive performance, egg quality, and utilization of dietary energy and nutrients in aged laying hens raised under hot climatic conditions |
| title_fullStr | Effect of dietary β-mannanase on productive performance, egg quality, and utilization of dietary energy and nutrients in aged laying hens raised under hot climatic conditions |
| title_full_unstemmed | Effect of dietary β-mannanase on productive performance, egg quality, and utilization of dietary energy and nutrients in aged laying hens raised under hot climatic conditions |
| title_short | Effect of dietary β-mannanase on productive performance, egg quality, and utilization of dietary energy and nutrients in aged laying hens raised under hot climatic conditions |
| title_sort | effect of dietary β mannanase on productive performance egg quality and utilization of dietary energy and nutrients in aged laying hens raised under hot climatic conditions |
| topic | Aged Laying Hen β-Mannanase Egg Quality Hot Climatic Condition Performance |
| url | http://www.ajas.info/upload/pdf/ajas-30-10-1450.pdf |
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