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Limestone particle sizes and lighting regimens on egg and bone quality of laying hens PAB
Xavier,Regina Patrícia de Souza; Freitas,Ednardo Rodrigues; Braz,Nádia Melo; Farias,Nadja Naiara Pereira; Lima,Raffaella Castro; Watanabe,Pedro Henrique; Nascimento,Germano Augusto Jerônimo; Peixoto,Maria Simone Mendes.
Abstract:The objective of this work was to evaluate the effect of limestone particle sizes in the diet and of lighting regimes on the egg and bone quality and on the performance of commercial laying hens. Three hundred Hissex White layers, at 18 weeks of age, were distributed in a completely randomized design, in a 5×2 factorial arrangement (coarse limestone in the diet at 0, 25, 50, 75, and 100%; with or without artificial light), with five replicates of six birds. No significant interaction was observed between particle sizes and lighting regime for the evaluated parameters. There was no significant effect of coarse limestone level in the diet on the performance and egg quality of hens; however, bone deformity (3.23 to 4.01 mm), strength (5.19 to 6.70...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Egg mass; Shell thickness; Specific gravity; Tibia.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015000800718
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Prediction equations for the energy values of soybean meal for pigs at the growing phase with ex-post validation Rev. Ciênc. Agron.
Ellery,Everardo Ayres Correia; Watanabe,Pedro Henrique; Bertol,Teresinha Marisa; Freitas,Ednardo Rodrigues; Nascimento,Germano Augusto Jerônimo.
ABSTRACTThe aim of this study was to determine and validate prediction equations for digestible (DE) and metabolizable energy (ME) of soybean meal for growing pigs. The prediction equations were developed using data from chemical composition, digestibility and metabolizability of soybean meal samples (n = 25) evaluated in essays at Embrapa Suínos e Aves. The equations were estimated through regression analysis, using the REG procedure of SAS and adjusted R² was the criterion of choice to select the best models. Two equations were estimated for DE and two for ME. To validate the equations, one experiment with two essays was performed to determine the values of DE and ME of five samples of soybean meal. In each essay, 24 growing pigs with an initial weight...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Digestible energy; Mathematical models; Metabolizable energy; Protein feedstuffs.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000400873
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