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Descripción
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| We investigated the effects of soybean meal source (SBM) and feed form of the diet on productive performance and digestive traits of broilers from 0 to 25 d of age. The experimental design was completely randomized with 12 treatments arranged factorially with 4 commercial SBM and 3 feed forms (mash, pellets, and crumbles). The SBM were collected at random from the market and had a CP content that varied from 46.30 to 48.10%. Each treatment was replicated 6 times and the experimental unit was a cage with 12 chicks. The quality of the pellets and crumbles was visually good, they were uniform in size, and dust was absent. The pellet had a diameter of 2 mm and an average length of 5.3 mm. SBM source did not affect any trait studied and therefore, only data on feed form are presented. From 0 to 2 d of age chicks fed crumbles had 9% higher BW gain (BWG) than chicks fed pellets or mash (P ¡Ü 0.05). Feed consumption was 11% lower (P ¡Ü 0.05) in chicks fed pellets than in chicks fed crumbles, probably because of the excessive length of the pellets. From 3 to 25 d of age birds fed pellets compensated and for the global experimental chicks fed pellets had 21% higher feed consumption and 26% higher BWG than chicks fed mash with chicks fed crumbles being intermediate (P ¡Ü 0.001). Feed form affected relative size (% BW) of most digestive organs. Gizzard weight was reduced in chicks fed pellets or crumbles with respect to chicks fed mash (P ¡Ü 0.001). Also, liver weight was increased (P ¡Ü 0.001) in chicks fed pellets, suggesting that fat metabolism was exacerbated with pellet feeding, probably as a consequence of the higher feed intake. Gizzard pH was higher in chicks fed pellets than in chicks fed mash, with chicks fed crumbles being intermediate (P ¡Ü 0.001). The results indicate that feed form affects performance and digestive traits of chicks and that pellets and crumbles are preferred to mash diets. | |
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Internacional
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Si |
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Nombre congreso
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97th Poultry Science Annual Meeting |
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Tipo de participación
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960 |
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Lugar del congreso
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Ni?¢gara Falls, Canad?¢ |
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Revisores
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Si |
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ISBN o ISSN
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1525-3171 |
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DOI
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Fecha inicio congreso
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20/07/2008 |
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Fecha fin congreso
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23/07/2008 |
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Desde la página
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34 |
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Hasta la página
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34 |
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Título de las actas
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Poultry Science 87 (1) |