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Descripción
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| The influence of fiber source and dietary fat level on digestive traits and productive performance was studied in broilers from 1 to 21 d of age. There were 6 treatments arranged factorially with 3 sources of fiber (none; 3% oat hulls, OH; and 3% sugar beet pulp, SBP) and 2 fat sources (5% soybean oil, SO; and 5% yellow grease, YG). Each treatment was replicated 6 times and the experimental unit was a cage with 18 broilers. Fiber inclusion improved BW gain (P ¿ 0.05) and feed:gain ratio (P ¿ 0.001) and increased total tract apparent retention (TTAR) of all nutrients measured (P ¿ 0.001). The increases observed in TTAR of nitrogen and ether extract and on AMEn of the diet were more pronounced with OH than with SBP. The increases in nutrient digestibility with OH inclusion were higher at excreta than at ileal level and in fact, SBP inclusion reduced the apparent ileal digestibility of most nutrients. The relative weight (%) of the gizzard was increased (P ¿ 0.001) and the pH of its contents was reduced (P ¿ 0.001) when additional fiber was included in the diet. The TTAR of nutrients was higher for the SO than for the YG diets (P ¿ 0.001). Also, the increases in ether extract digestibility (P ¿ 0.05) and AMEn (P ¿ 0.05) of the diet with fiber inclusion were more pronounced with the YG than with the SO. Therefore, the inclusión of moderate amounts of fiber in the diet might improve performance and nutrient digestibility in young chicks, especially when saturated fats are used. | |
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Internacional
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Si |
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JCR del ISI
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Si |
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Título de la revista
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POULTRY SCIENCE |
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ISSN
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0032-5791 |
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Factor de impacto JCR
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1,668 |
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Información de impacto
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Volumen
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88 |
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DOI
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Número de revista
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0 |
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