Data/hora: 02/06/2024 01:43:21

Biblioteca(s): 	Embrapa Suínos e Aves.	
Tipo da produção científica: 	Artigo em Periódico Indexado	
Circulação/Nível: 	B - 1	
Data corrente: 	05/08/2021	
Data da última atualização: 	05/08/2021	
Autoria: 	BRITO, C. O.; CUNHA-FILHO, O. G.; SILVA, C. M.; VIEIRA, J. S.; DEL VESCO, A. P.; FEITOSA, V. E. M.; BARBOSA, L. T.; RIBEIRO JÚNIOR, V.; TAVERNARI, F. de C.	
Afiliação: 	CLAUDSON O. BRITO, UFS; OCTAVIO G. CUNHA-FILHO, UFS; CAMILLA MENDONÇA SILVA, UFS; JODNES S. VIEIRA, UFS; ANA PAULA DEL VESCO, UFS; VICTOR E. M. FEITOSA, UFS; LEANDRO T. BARBOSA, UFS; VALDIR RIBEIRO JUNIOR, UFS; FERNANDO DE CASTRO TAVERNARI, CNPSA.	
Título: 	Estimate of body growth curve and feed intake of free-range chickens receiving different levels of digestible lysine.	
Ano de publicação: 	2021	
Fonte/Imprenta: 	Spanish Journal of Agricultural Research, v. 19, n.1, ed. e0602, 2021.	
DOI: 	https://doi.org/10.5424/sjar/2021191-15815	
Idioma: 	Inglês	
Conteúdo: 	Abstract Aim of 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.	
Palavras-Chave: 	Color Plumé.	
Thesagro: 	Aminoácido; Condição Corporal; Estimulante de Crescimento Animal; Etapa de Desenvolvimento Animal; Galinha Caipira; Lisina; Nutrição Animal.	
Thesaurus Nal: 	Amino acids; Animal nutrition; Broiler chickens; Chickens; Lysine; Nonlinear models.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Suínos e Aves (CNPSA)	
Exemplares: 	CNPSA - (22155-1) - UPC - AP - DD -  -  -  - DIS