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| Lima,Matheus Ramalho de; Costa,Fernando Guilherme Perazzo; Givisiez,Patrícia Emília Naves; Silva,José Humberto Vilar da; Sakomura,Nilva Kazue; Lima,Denise Fontana Figueiredo. |
| The aim of this work was to evaluate the effects of the reduction on nutritional levels of diets for semi-heavy hens during the laying peak on performance, egg quality and bone parameters. A total of eight diets were evaluated, each one with five repetitions of eight birds: 1) control: formulated to supply requirements by the birds; 2) control + 0.03% or 600 FTU; 3) 15% crude protein; 2,800 kcal ME; 3.8% Ca and 0.28% aP; 4) diet 3 + 0.03% or 600 FTU; 5) 14% crude protein; 2,750 kcal ME; 3.4% Ca and 0.23% aP; 6) diet 5 + 0.03% or 600 FTU; 7) 13% crude protein; 2,700 kcal ME; 3.0% Ca and 0.18% aP; and 8) diet 7 + 600 FTU. The reduction of the nutritional levels harmed the performance of the birds, particularly egg production and egg mass, which improved by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bone health; Eggs; Laying hens; Performance. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001000016 |
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| Lima,Matheus Ramalho de; Costa,Fernando Guilherme Perazzo; Goulart,Cláudia de Castro; Pinheiro,Sarah Gomes; Souza,Rafael Barbosa de; Morais,Sérgio Antonio de Normando; Lima,Raffaella Castro. |
| The objective of this study was to evaluate the reduction of protein, the formulation of diets and supplementation of an enzyme complex for laying hens. The layers were distributed in a completely randomized 2 × 2 × 2 factorial arrangement, with two levels of crude protein reduction (0.0 and 4.0 g/kg), two kinds of diet formulation (without and with reformulation, considering 75 kcal of metabolizable energy) and two enzyme supplementations (without and with enzyme complex supplementation), totalizing 8 treatments of 8 layers each, with 7 replications, in a total of 448 laying hens at 30 weeks of age. After data analysis, it was found that the enzyme complex supplementation in the diet of layers improves performance, promotes a similar egg quality and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bone health; Egg quality; Intestinal health; Performance. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000900013 |
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