دورية أكاديمية
Estimate of body growth curve and feed intake of free-range chickens receiving different levels of digestible lysine
| العنوان: | Estimate of body growth curve and feed intake of free-range chickens receiving different levels of digestible lysine |
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| المؤلفون: | Claudson O. Brito, Octavio G. Cunha-Filho, Camilla M. Silva, Jodnes S. Vieira, Ana P. Del-Vesco, Victor E. M. Feitosa, Leandro T. Barbosa, Valdir Ribeiro-Júnior, Fernando C. Tavernari |
| المصدر: | Spanish Journal of Agricultural Research, Vol 19, Iss 1, Pp e0602-e0602 (2021) |
| بيانات النشر: | Consejo Superior de Investigaciones Científicas (CSIC), 2021. |
| سنة النشر: | 2021 |
| المجموعة: | LCC:Agriculture |
| مصطلحات موضوعية: | amino acids, broilers, color plumé, nonlinear, Agriculture |
| الوصف: | Aim of the study: To adjust nonlinear Gompertz model to describe the body growth and feed intake (FI) of free-range chickens of the CPK (Color Plumé) strain, receiving different levels of digestible lysine (dig-Lys), from 21 to 77 days of age. Area of study: São Cristovão, Sergipe, Brazil. Material and methods: A total of 432 one-day-old unsexed chickens were used in the study. At 21 days of age, the birds were assigned to four treatments (0.85%; 0.97%; 1.09%; 1.21%) of dig-Lys, in a completely randomized design with four replicates, with 27 birds per experimental unit. The Gompertz model was used to estimate bird growth curves related to body weight (BW) and FI at each Lys level. Main results: The tests of comparison between the parameters of the Gompertz model for each Lys level showed that parameter A varied, while parameters B (0.0329) and C (45.819) did not differ significantly. In parameter A, the dig-Lys level of 0.97% provided the highest BW estimate at maturity and maximum BW at the inflection point. Research highlights: Use of non-linear models to predict nutritional requirements, helps farmers to optimize management decisions and, thus, maximize their profit. According to Gompertz model, it was possible to infer that the inclusion of 0.97% dig-Lys in the diet of mixed batches of free-range chickens of the CPK strain meets their nutritional requirements. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2171-9292 1191-1581 |
| Relation: | https://revistas.inia.es/index.php/sjar/article/view/15815; https://doaj.org/toc/2171-9292 |
| DOI: | 10.5424/sjar/2021191-15815 |
| URL الوصول: | https://doaj.org/article/1866c785d489442ba4ab28404b66d724 |
| رقم الأكسشن: | edsdoj.1866c785d489442ba4ab28404b66d724 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 21719292 11911581 |
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| DOI: | 10.5424/sjar/2021191-15815 |