Impact of feeding varying grower digestible lysine and energy levels to female Cobb MV × Cobb 500 broilers from 14 to 28 D on 42 D growth performance, processing, and economic return
Summary: Previous research in our laboratory has revealed that feeding crumbled diets with various levels of starter digestible Lys (dLys) and AME affects early feed conversion ratio (FCR) of Cobb MV × Cobb 500 broilers. However, overall performance was not affected, likely due to treatment applicat...
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| Format: | Article |
| Language: | English |
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Elsevier
2020-09-01
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| Series: | Journal of Applied Poultry Research |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1056617120300398 |
| _version_ | 1818306799090008064 |
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| author | R.A. Hirai L. Mejia C. Coto J. Caldas C.D. McDaniel K.G.S. Wamsley |
| author_facet | R.A. Hirai L. Mejia C. Coto J. Caldas C.D. McDaniel K.G.S. Wamsley |
| author_sort | R.A. Hirai |
| collection | DOAJ |
| description | Summary: Previous research in our laboratory has revealed that feeding crumbled diets with various levels of starter digestible Lys (dLys) and AME affects early feed conversion ratio (FCR) of Cobb MV × Cobb 500 broilers. However, overall performance was not affected, likely due to treatment application occurring in the starter phase. Therefore, the objective of this study was to evaluate a 3 dLys (1.00, 1.08, and 1.18%) × 4 AME (2,937, 3,028, 3,116, and 3,206 kcal/kg) factorial arrangement of pelleted grower diet treatments (Gdiets) and their impact on 42-day-old Cobb MV × Cobb 500 females. Significant dLys × AME interactions demonstrated a stepwise decrease in FCR (day 14–28 and 14–35) when dLys increased at 2,937, 3,116, and 3,206 kcal/kg but not at 3,028 kcal/kg AME. A significant dLys × AME interaction was also observed for day 14–28 total Lys intake/bird. Overall data exhibited improvements in BW and BW gain (BWG) when feeding Gdiets of 1.08 or 1.18% dLys. Feeding Gdiets of 1.18% dLys or ≥3,028 kcal/kg AME optimized day 14–41 FCR. Processing data demonstrated improved breast yield when feeding Gdiets formulated to ≥1.08% dLys or formulated to 2,937 or 3,028 kcal/kg AME. The most profitable Gdiet was 1.18% dLys +3,028 kcal/kg AME. To determine the best feeding regime for this new cross, future research should evaluate the effects of varying dLys and AME levels during the finisher phase on broiler performance. |
| first_indexed | 2024-12-13T06:48:13Z |
| format | Article |
| id | doaj.art-59358f4db86f42f99071dfabdef3ef83 |
| institution | Directory Open Access Journal |
| issn | 1056-6171 |
| language | English |
| last_indexed | 2024-12-13T06:48:13Z |
| publishDate | 2020-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Applied Poultry Research |
| spelling | doaj.art-59358f4db86f42f99071dfabdef3ef832022-12-21T23:56:12ZengElsevierJournal of Applied Poultry Research1056-61712020-09-01293600621Impact of feeding varying grower digestible lysine and energy levels to female Cobb MV × Cobb 500 broilers from 14 to 28 D on 42 D growth performance, processing, and economic returnR.A. Hirai0L. Mejia1C. Coto2J. Caldas3C.D. McDaniel4K.G.S. Wamsley5Department of Poultry Science, Mississippi State University, Mississippi State, MS, USACobb-Vantress, Siloam Springs, AR, USACobb-Vantress, Siloam Springs, AR, USACobb-Vantress, Siloam Springs, AR, USADepartment of Poultry Science, Mississippi State University, Mississippi State, MS, USADepartment of Poultry Science, Mississippi State University, Mississippi State, MS, USA; Corresponding author:Summary: Previous research in our laboratory has revealed that feeding crumbled diets with various levels of starter digestible Lys (dLys) and AME affects early feed conversion ratio (FCR) of Cobb MV × Cobb 500 broilers. However, overall performance was not affected, likely due to treatment application occurring in the starter phase. Therefore, the objective of this study was to evaluate a 3 dLys (1.00, 1.08, and 1.18%) × 4 AME (2,937, 3,028, 3,116, and 3,206 kcal/kg) factorial arrangement of pelleted grower diet treatments (Gdiets) and their impact on 42-day-old Cobb MV × Cobb 500 females. Significant dLys × AME interactions demonstrated a stepwise decrease in FCR (day 14–28 and 14–35) when dLys increased at 2,937, 3,116, and 3,206 kcal/kg but not at 3,028 kcal/kg AME. A significant dLys × AME interaction was also observed for day 14–28 total Lys intake/bird. Overall data exhibited improvements in BW and BW gain (BWG) when feeding Gdiets of 1.08 or 1.18% dLys. Feeding Gdiets of 1.18% dLys or ≥3,028 kcal/kg AME optimized day 14–41 FCR. Processing data demonstrated improved breast yield when feeding Gdiets formulated to ≥1.08% dLys or formulated to 2,937 or 3,028 kcal/kg AME. The most profitable Gdiet was 1.18% dLys +3,028 kcal/kg AME. To determine the best feeding regime for this new cross, future research should evaluate the effects of varying dLys and AME levels during the finisher phase on broiler performance.http://www.sciencedirect.com/science/article/pii/S1056617120300398lysineenergybroilerlive performanceprocessing yield |
| spellingShingle | R.A. Hirai L. Mejia C. Coto J. Caldas C.D. McDaniel K.G.S. Wamsley Impact of feeding varying grower digestible lysine and energy levels to female Cobb MV × Cobb 500 broilers from 14 to 28 D on 42 D growth performance, processing, and economic return Journal of Applied Poultry Research lysine energy broiler live performance processing yield |
| title | Impact of feeding varying grower digestible lysine and energy levels to female Cobb MV × Cobb 500 broilers from 14 to 28 D on 42 D growth performance, processing, and economic return |
| title_full | Impact of feeding varying grower digestible lysine and energy levels to female Cobb MV × Cobb 500 broilers from 14 to 28 D on 42 D growth performance, processing, and economic return |
| title_fullStr | Impact of feeding varying grower digestible lysine and energy levels to female Cobb MV × Cobb 500 broilers from 14 to 28 D on 42 D growth performance, processing, and economic return |
| title_full_unstemmed | Impact of feeding varying grower digestible lysine and energy levels to female Cobb MV × Cobb 500 broilers from 14 to 28 D on 42 D growth performance, processing, and economic return |
| title_short | Impact of feeding varying grower digestible lysine and energy levels to female Cobb MV × Cobb 500 broilers from 14 to 28 D on 42 D growth performance, processing, and economic return |
| title_sort | impact of feeding varying grower digestible lysine and energy levels to female cobb mv cobb 500 broilers from 14 to 28 d on 42 d growth performance processing and economic return |
| topic | lysine energy broiler live performance processing yield |
| url | http://www.sciencedirect.com/science/article/pii/S1056617120300398 |
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