The Optimum Ratio of Digestible Leucine: Lysine in Wheat-based Diets for Female Broiler Chickens From 8 – 21 Days of Age
SUMMARY: Leucine (Leu) is one of the essential amino acids, and has a direct effect on protein biosynthesis in broiler skeletal muscle. So supply of sufficient amounts of Leu in young broiler is of interest. Therefore, the purpose of the current study was to estimate the optimal digestible Leu in ra...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-06-01
|
| Series: | Journal of Applied Poultry Research |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1056617122000538 |
| _version_ | 1827945276715827200 |
|---|---|
| author | S. Amirdahri H. Janmohammadi A. Taghizadeh W. Lambert M. Olyayee E. Assadi Soumeh |
| author_facet | S. Amirdahri H. Janmohammadi A. Taghizadeh W. Lambert M. Olyayee E. Assadi Soumeh |
| author_sort | S. Amirdahri |
| collection | DOAJ |
| description | SUMMARY: Leucine (Leu) is one of the essential amino acids, and has a direct effect on protein biosynthesis in broiler skeletal muscle. So supply of sufficient amounts of Leu in young broiler is of interest. Therefore, the purpose of the current study was to estimate the optimal digestible Leu in ratio to lysine (Lys) of female broiler chickens from 8 to 21 d. A dose-response trial was performed, and the optimal digestible Leu was estimated applying broken-lines and quadratic regression models. A total of 540 one-wk-old female broiler chickens (Cobb-500), were randomly distributed to 6 dietary treatments (6 replicate of 15 birds in each), and fed the experimental diets from 8 to 21 d of age. Dietary digestible Leu was supplied from 0.93% up to 1.18% in 0.05% increments. Wheat-soybean meal based diet was formulated to be deficient in Leu, and dietary treatments were created by gradually replacing crystalline L-glutamic acid with crystalline L-Leu in basal diet. The live performance and carcass traits were evaluated, and excretion and retention of nitrogen was measured. The results showed that weight gain (WG), feed intake (FI), carcass weight, and breast weight had a quadratically response to digestible Leu: Lys from 0.93 to 1.18. Also, none of the retention and excretion of nitrogen were affected by increasing dietary digestible Leu levels. Based on the obtained data in the current study, the optimal digestible Leu: Lys of female Cobb 500 broilers fed with wheat-based diets from 8 to 21 d of age was estimated between 0.99 and 1.12 with an average of 1.06 based on quadratic broken-line model as the concluded value. |
| first_indexed | 2024-03-13T10:42:23Z |
| format | Article |
| id | doaj.art-b4e32c51f9d84f9eaf1364f238715122 |
| institution | Directory Open Access Journal |
| issn | 1056-6171 |
| language | English |
| last_indexed | 2024-03-13T10:42:23Z |
| publishDate | 2023-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Applied Poultry Research |
| spelling | doaj.art-b4e32c51f9d84f9eaf1364f2387151222023-05-18T04:37:43ZengElsevierJournal of Applied Poultry Research1056-61712023-06-01322100289The Optimum Ratio of Digestible Leucine: Lysine in Wheat-based Diets for Female Broiler Chickens From 8 – 21 Days of AgeS. Amirdahri0H. Janmohammadi1A. Taghizadeh2W. Lambert3M. Olyayee4E. Assadi Soumeh5Department of Animal science, University of Tabriz, Tabriz, IranDepartment of Animal science, University of Tabriz, Tabriz, Iran; Corresponding author:Department of Animal science, University of Tabriz, Tabriz, IranMetex Noovistago, Paris 75017, FranceDepartment of Animal science, University of Tabriz, Tabriz, IranSchool of Agriculture and Food Sciences, Faculty of Science, University of Queensland, Qld 4343, AustraliaSUMMARY: Leucine (Leu) is one of the essential amino acids, and has a direct effect on protein biosynthesis in broiler skeletal muscle. So supply of sufficient amounts of Leu in young broiler is of interest. Therefore, the purpose of the current study was to estimate the optimal digestible Leu in ratio to lysine (Lys) of female broiler chickens from 8 to 21 d. A dose-response trial was performed, and the optimal digestible Leu was estimated applying broken-lines and quadratic regression models. A total of 540 one-wk-old female broiler chickens (Cobb-500), were randomly distributed to 6 dietary treatments (6 replicate of 15 birds in each), and fed the experimental diets from 8 to 21 d of age. Dietary digestible Leu was supplied from 0.93% up to 1.18% in 0.05% increments. Wheat-soybean meal based diet was formulated to be deficient in Leu, and dietary treatments were created by gradually replacing crystalline L-glutamic acid with crystalline L-Leu in basal diet. The live performance and carcass traits were evaluated, and excretion and retention of nitrogen was measured. The results showed that weight gain (WG), feed intake (FI), carcass weight, and breast weight had a quadratically response to digestible Leu: Lys from 0.93 to 1.18. Also, none of the retention and excretion of nitrogen were affected by increasing dietary digestible Leu levels. Based on the obtained data in the current study, the optimal digestible Leu: Lys of female Cobb 500 broilers fed with wheat-based diets from 8 to 21 d of age was estimated between 0.99 and 1.12 with an average of 1.06 based on quadratic broken-line model as the concluded value.http://www.sciencedirect.com/science/article/pii/S1056617122000538branched chain-amino aciddose-responsebroilerleucine |
| spellingShingle | S. Amirdahri H. Janmohammadi A. Taghizadeh W. Lambert M. Olyayee E. Assadi Soumeh The Optimum Ratio of Digestible Leucine: Lysine in Wheat-based Diets for Female Broiler Chickens From 8 – 21 Days of Age Journal of Applied Poultry Research branched chain-amino acid dose-response broiler leucine |
| title | The Optimum Ratio of Digestible Leucine: Lysine in Wheat-based Diets for Female Broiler Chickens From 8 – 21 Days of Age |
| title_full | The Optimum Ratio of Digestible Leucine: Lysine in Wheat-based Diets for Female Broiler Chickens From 8 – 21 Days of Age |
| title_fullStr | The Optimum Ratio of Digestible Leucine: Lysine in Wheat-based Diets for Female Broiler Chickens From 8 – 21 Days of Age |
| title_full_unstemmed | The Optimum Ratio of Digestible Leucine: Lysine in Wheat-based Diets for Female Broiler Chickens From 8 – 21 Days of Age |
| title_short | The Optimum Ratio of Digestible Leucine: Lysine in Wheat-based Diets for Female Broiler Chickens From 8 – 21 Days of Age |
| title_sort | optimum ratio of digestible leucine lysine in wheat based diets for female broiler chickens from 8 21 days of age |
| topic | branched chain-amino acid dose-response broiler leucine |
| url | http://www.sciencedirect.com/science/article/pii/S1056617122000538 |
| work_keys_str_mv | AT samirdahri theoptimumratioofdigestibleleucinelysineinwheatbaseddietsforfemalebroilerchickensfrom821daysofage AT hjanmohammadi theoptimumratioofdigestibleleucinelysineinwheatbaseddietsforfemalebroilerchickensfrom821daysofage AT ataghizadeh theoptimumratioofdigestibleleucinelysineinwheatbaseddietsforfemalebroilerchickensfrom821daysofage AT wlambert theoptimumratioofdigestibleleucinelysineinwheatbaseddietsforfemalebroilerchickensfrom821daysofage AT molyayee theoptimumratioofdigestibleleucinelysineinwheatbaseddietsforfemalebroilerchickensfrom821daysofage AT eassadisoumeh theoptimumratioofdigestibleleucinelysineinwheatbaseddietsforfemalebroilerchickensfrom821daysofage AT samirdahri optimumratioofdigestibleleucinelysineinwheatbaseddietsforfemalebroilerchickensfrom821daysofage AT hjanmohammadi optimumratioofdigestibleleucinelysineinwheatbaseddietsforfemalebroilerchickensfrom821daysofage AT ataghizadeh optimumratioofdigestibleleucinelysineinwheatbaseddietsforfemalebroilerchickensfrom821daysofage AT wlambert optimumratioofdigestibleleucinelysineinwheatbaseddietsforfemalebroilerchickensfrom821daysofage AT molyayee optimumratioofdigestibleleucinelysineinwheatbaseddietsforfemalebroilerchickensfrom821daysofage AT eassadisoumeh optimumratioofdigestibleleucinelysineinwheatbaseddietsforfemalebroilerchickensfrom821daysofage |