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Descripción
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| A trial was conducted to study the effect of the main cereal of the diet and feed form on productive performance and digestive traits of brown pullets from 1 to 120 d of age. There were 4 dietary treatments arranged factorially with 2 cereals (corn vs. wheat) and 2 feed forms (mash vs. 2-mm pellets). Each treatment was replicated 6 times (24 pullets placed in 2 adjacent cages per replicate). From 46 to 120 d of age all the diets were offered as mash; therefore they differed only in the cereal used. Type of cereal had little effect on pullet performance. Pelleting improved feed intake (27.24 vs. 25.69 g; P ¡Ü 0.001) and BW gain (10.89 vs. 10.28 g/d; P ¡Ü 0.001) from 1 to 45 d of age but feed-togain ratio was not affected. From 1 to 120 d of age, pullets that were fed pellets from 1 to 45 d had higher BW gain (12.35 vs. 11.98 g/d; P ¡Ü 0.001) than pullets that were fed mash. Pullets fed corn had heavier relative weight (RW, %BW) of the gizzard (3.74 vs. 3.17%BW; P ¡Ü 0.001) at 45 d of age than pullets fed wheat. Also, at this age, pelleting reduced the RW of the digestive tract (12.91 vs. 14.60%BW) and the gizzard (2.72 vs. 4.19%BW; P ¡Ü 0.001), and the relative length of the small intestine (237.5 vs. 255.0 cm/Kg BW; P ¡Ü 0.01) and the ceca (21.3 vs. 25.1 cm/Kg BW; P ¡Ü 0.01). The effect of feed form on RW of the gizzard and relative length of the small intestine was maintained at 120 d of age (P ¡Ü 0.01). At 120 d of age, gizzard pH was not affected by type of cereal but was higher in pullets that were fed pellets during the prestarter phase (3.99 vs. 3.46; P ¡Ü 0.01). We conclude that wheat can be used successfully in pullet feeds and that feeding pellets from 1 to 45 d of age increases BW at 45 and 120 d of age. Pelleting reduces the RW of the upper gastrointestinal tract which might have some effects on performance of the pullets early in lay | |
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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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109 |
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Hasta la página
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109 |
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Título de las actas
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Poultry Science 87 (1) |