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Title: | Effect of protease supplementation on production performance of laying hens |
Other Titles: | Suplementação de protease sobre o desempenho produtivo de poedeiras |
Keywords: | Laying hens farming Galinhas poedeiras - Nutrição Ovos - Qualidade da casca Laying hens - Nutrition Eggs - Bark quality |
Issue Date: | Jan-2015 |
Publisher: | Universidade Estadual de Maringá |
Citation: | VIEIRA FILHO, J. A. et al. Effect of protease supplementation on production performance of laying hens. Acta Scientiarum: Animal Sciences, Maringá, v. 37, n. 1, p. 29-33, Jan./Mar. 2015. |
Abstract: | The experiment was conducted with the objective of evaluating the effect of protease enzyme supplementation on performance parameters and quality shell of laying hens. We used 240 Isa Brown commercial laying hens with 44 weeks of age. A completely randomized split-plot design (5 periods of 21 days) with four treatments and six replications (10 hens per replication) was used. The experimental diets were formulated according to the requirements of the breed. The following parameters were evaluated: egg production, feed intake, feed conversion, average egg weight, egg loss, specific gravity, percentage and shell thickness. After collection, the data were analyzed with SISVAR Statistical Package, and the means compared by SNK test at 5% probability. It was concluded that supplementation of diets low in nutrients with 500 g ton-1 of protease (100 U g-1), provides egg production and feed conversion rates similar to those obtained in laying hens fed diet with the nutritional level recommended for the breed. However, protease supplementation did not show effect on egg shell quality. |
URI: | http://repositorio.ufla.br/jspui/handle/1/12768 |
Appears in Collections: | DZO - Artigos publicados em periódicos |
Files in This Item:
File | Description | Size | Format | |
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ARTIGO_Effect of protease supplementation on production performance of laying hens.pdf | 581,38 kB | Adobe PDF | View/Open |
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