Effects of different nutritional plans on broiler performance

An experiment was carried out at the Department of Animal Science of the Federal University of Viçosa, Brazil, to evaluate the effects of different nutritional plans on the performance of male and female Ross broilers. A completely randomized experimental design with a 6x2 factorial arrangement (six...

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Bibliographic Details
Published in:	Revista brasileira de ciência avícola Vol. 11; no. 4; pp. 225 - 234
Main Authors:	Buteri, CB(Escola Agrotécnica Federal de Salinas), Tavernari, F de C(UFV), Lelis, GR(UFV), Rostagno, HS(UFV Departamento de Zootecnia), Albino, LFT(UFV Departamento de Zootecnia)
Format:	Journal Article
Language:	English
Published:	Fundação APINCO de Ciência e Tecnologia Avícolas 01-12-2009
Subjects:	Feeding programs lysine levels nutritional requirements
Online Access:	Get full text
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Summary:	An experiment was carried out at the Department of Animal Science of the Federal University of Viçosa, Brazil, to evaluate the effects of different nutritional plans on the performance of male and female Ross broilers. A completely randomized experimental design with a 6x2 factorial arrangement (six nutritional plans x two sexes) with six replicates of 20 birds per experimental unit was applied. The nutritional plans adopted for males and females included 3, 5, or 28 feeds, and the other 3 plans included 28 feeds containing 92.5, 100, and 107.5% of digestible lysine requirements established according to a mathematical model developed exclusively for Ross broilers. The results showed that the tested 28-feed feeding programs are equivalent, and allow similar performance as compared to 3- and 5-feed feeding programs. Based on the lysine levels included in the different nutritional plans, it was possible to fit the equations: Y = -0.0079x + 1.2435 (R² = 0.981) for males and Y = -0.0084x + 1.1925 (R² = 0.978) for females, where "Y" is digestible lysine level (%) and "x" is average age in days. These equations are specific for multiple-phase feeding programs. The performance of male and female broilers fed the lysine levels established by the mathematical models was similar as to that of birds fed the other nutritional plans. This demonstrates that it is possible to determine broiler lysine.
Bibliography:	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000400003 10.1590/S1516-635X2009000400003
ISSN:	1516-635X 1516-635X 1806-9061
DOI:	10.1590/s1516-635x2009000400003