Growth performance of male broiler chickens in different growth phases in response to amino acid concentrations in the pre-starter diet
An experiment involving 720 one-day-old male broilers (Ross 308) was conducted to investigate the effects of graded levels of crude protein and standardized ileal digestible (SID) amino acids (AA) on growth performance during the pre-starter period (0 to 7 d), and to compare the subsequent growth pe...
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Korean Society of Animal Sciences and Technology
2025-07-01
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| Series: | Journal of Animal Science and Technology |
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| Online Access: | http://www.ejast.org/archive/view_article?doi=10.5187/jast.2024.e55 |
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| author | Su Hyun An Changsu Kong |
| author_facet | Su Hyun An Changsu Kong |
| author_sort | Su Hyun An |
| collection | DOAJ |
| description | An experiment involving 720 one-day-old male broilers (Ross 308) was conducted to investigate the effects of graded levels of crude protein and standardized ileal digestible (SID) amino acids (AA) on growth performance during the pre-starter period (0 to 7 d), and to compare the subsequent growth performance of birds fed a commercial diet in the later phase (8 to 28 d). On d 1, all birds were individually weighed and allocated to six groups with eight replicate pens (15 birds/pen). Broilers were fed diets containing six different dietary SID AA levels relative to the 90 to 115% requirement for 7 d. From d 8 to 28, birds were fed a commercial diet containing nutrient levels meeting their dietary requirements. The body weight gain (BWG; p = 0.044) and gain-to-feed ratio (G:F; p = 0.005) of birds increased quadratically, and feed intake of birds linearly increased with increasing dietary AA concentration during d 0 to 7. Following the transition to a commercial diet, body weight at 14, 21, and 28 d, BWG, feed intake, and G:F linearly increased (p < 0.05). From 22 to 28 days of age, BWG (p = 0.001) and feed intake (p = 0.008) of birds linearly increased compared to the 90% SID AA treatment, whereas G:F was not affected (p = 0.088) by dietary treatment. Overall, BWG and the growth rate of broilers aged 8 to 28 d also exhibited linear increments (p < 0.01) by the dietary AA concentrations in diets during the first week. The study findings confirm the influence of dietary AA concentrations on the growth performance of broilers in the first week after hatch, demonstrating that this impact persists in the later growth stage. Therefore, ensuring sufficient dietary AA intake during the first week of life can enhance performance in later stages of development in broiler chickens. |
| format | Article |
| id | doaj-art-4a4ac07f5766465d98cbb1d642937855 |
| institution | Kabale University |
| issn | 2672-0191 2055-0391 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Korean Society of Animal Sciences and Technology |
| record_format | Article |
| series | Journal of Animal Science and Technology |
| spelling | doaj-art-4a4ac07f5766465d98cbb1d6429378552025-08-20T03:47:06ZengKorean Society of Animal Sciences and TechnologyJournal of Animal Science and Technology2672-01912055-03912025-07-0167483985210.5187/jast.2024.e55Growth performance of male broiler chickens in different growth phases in response to amino acid concentrations in the pre-starter dietSu Hyun An0Changsu Kong1Research Institute for Innovative Animal Science, Kyungpook National University, Sangju 37224, KoreaResearch Institute for Innovative Animal Science, Kyungpook National University, Sangju 37224, KoreaAn experiment involving 720 one-day-old male broilers (Ross 308) was conducted to investigate the effects of graded levels of crude protein and standardized ileal digestible (SID) amino acids (AA) on growth performance during the pre-starter period (0 to 7 d), and to compare the subsequent growth performance of birds fed a commercial diet in the later phase (8 to 28 d). On d 1, all birds were individually weighed and allocated to six groups with eight replicate pens (15 birds/pen). Broilers were fed diets containing six different dietary SID AA levels relative to the 90 to 115% requirement for 7 d. From d 8 to 28, birds were fed a commercial diet containing nutrient levels meeting their dietary requirements. The body weight gain (BWG; p = 0.044) and gain-to-feed ratio (G:F; p = 0.005) of birds increased quadratically, and feed intake of birds linearly increased with increasing dietary AA concentration during d 0 to 7. Following the transition to a commercial diet, body weight at 14, 21, and 28 d, BWG, feed intake, and G:F linearly increased (p < 0.05). From 22 to 28 days of age, BWG (p = 0.001) and feed intake (p = 0.008) of birds linearly increased compared to the 90% SID AA treatment, whereas G:F was not affected (p = 0.088) by dietary treatment. Overall, BWG and the growth rate of broilers aged 8 to 28 d also exhibited linear increments (p < 0.01) by the dietary AA concentrations in diets during the first week. The study findings confirm the influence of dietary AA concentrations on the growth performance of broilers in the first week after hatch, demonstrating that this impact persists in the later growth stage. Therefore, ensuring sufficient dietary AA intake during the first week of life can enhance performance in later stages of development in broiler chickens. http://www.ejast.org/archive/view_article?doi=10.5187/jast.2024.e55Amino acid contentStandardized ileal digestibleIdeal amino acid ratioGrowth performanceBroiler |
| spellingShingle | Su Hyun An Changsu Kong Growth performance of male broiler chickens in different growth phases in response to amino acid concentrations in the pre-starter diet Journal of Animal Science and Technology Amino acid content Standardized ileal digestible Ideal amino acid ratio Growth performance Broiler |
| title | Growth performance of male broiler chickens in different growth phases in response to amino acid concentrations in the pre-starter diet |
| title_full | Growth performance of male broiler chickens in different growth phases in response to amino acid concentrations in the pre-starter diet |
| title_fullStr | Growth performance of male broiler chickens in different growth phases in response to amino acid concentrations in the pre-starter diet |
| title_full_unstemmed | Growth performance of male broiler chickens in different growth phases in response to amino acid concentrations in the pre-starter diet |
| title_short | Growth performance of male broiler chickens in different growth phases in response to amino acid concentrations in the pre-starter diet |
| title_sort | growth performance of male broiler chickens in different growth phases in response to amino acid concentrations in the pre starter diet |
| topic | Amino acid content Standardized ileal digestible Ideal amino acid ratio Growth performance Broiler |
| url | http://www.ejast.org/archive/view_article?doi=10.5187/jast.2024.e55 |
| work_keys_str_mv | AT suhyunan growthperformanceofmalebroilerchickensindifferentgrowthphasesinresponsetoaminoacidconcentrationsintheprestarterdiet AT changsukong growthperformanceofmalebroilerchickensindifferentgrowthphasesinresponsetoaminoacidconcentrationsintheprestarterdiet |