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Descripción
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| The effects of inclusion of 0.1% of a chemically protected Na-butyrate (Butirex C4, Nutega, S. A.) in the diet on growth performance and totaltract apparent retention (TTAR) of broilers were studied. There were 8 treatments arranged as a 2 × 2 × 2 factorial with 2 sources of cereal (wheat and corn), 2 AMEn content of diets [high energy (HE) and low energy (LE) differing in 60 kcal AMEn/kg], and 2 levels of protected Na-butyrate (0 vs. 0.1%). Each treatment was replicated 4 times and the experimental unit was a pen with 25 broilers. The experiment consisted in 3 feeding phases (starter, grower, and finisher). For the entire experimental period (0 to 40 d), feed conversion ratio (FCR) was better in broilers fed the corn diet (P < 0.05) than in broilers fed the wheat diet and for broilers fed the HE diets (P ? 0.01) than for broilers fed the LE diets. Also, the inclusion of Na-butyrate tended to increase ADFI (P = 0.09) in this period. From 0 to 20 d of age, broilers fed the corn diet ate less feed and had better FCR than broilers fed the wheat diet (P < 0.001). Chicks fed the low energy diets had proportionally greater ADFI (5.9%) and worse FCR (5.3%) than broilers fed the HE diet (P < 0.001). Also in this period, the inclusion of Na-butyrate increased ADG by 8.6% and ADFI by 4.8% and improved FCR by 3.6% (P < 0.001). The TTAR of DM, OM, and N (P < 0.01) and the AMEn of the diet (P < 0.001) were higher in broilers fed corn than in broilers fed wheat. The AMEn of the diet tended to increase with the inclusion of Na-butyrate (P = 0.09). In summary, the use of corn and an increase in energy content of the diet improved FCR from 0 to 40 d of age. The supplementation with Na-butyrate improved ADG and FCR at 20 d of age, irrespective of the main cereal and energy content of the diet. | |
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Internacional
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Si |
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Nombre congreso
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poultry science association |
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Tipo de participación
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960 |
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Lugar del congreso
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Louisville, Kentucky |
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Revisores
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Si |
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ISBN o ISSN
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0032-5791 |
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DOI
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Fecha inicio congreso
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27/07/2015 |
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Fecha fin congreso
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30/07/2015 |
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Desde la página
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55 |
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Hasta la página
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55 |
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Título de las actas
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Inclusion of Na-butyrate in diets based on corn or wheat: Effects on growth performance and nutrient retention in broilers from 1 to 40 d of age. |