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Descripción
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| The influence of the geometric mean diameter (GMD) of the main cereal of the diet on productivity was studied in hens from 33 to 64 wk of age. The experiment was completely randomized with 6 dietary treatments arranged as a 3 × 2 factorial with 3 main cereals (barley, corn, and wheat) and 2 grinding sizes of the cereal (6 and 10 mm screen). Diets were isonutritive. Each treatment was replicated 11 times. Egg production, ADFI, egg weight, egg mass, and feed conversion ratio (FCR) were calculated by period of 28 d each, as well as for the entire experiment (33 to 64 wk of age). Also, egg quality traits (number of dirty, broken, and shell-less eggs, proportion of albumen, yolk, and shell, and thickness, strength, and color of the shell) were measured. No interactions between main cereal and GMD of the diet were observed for any of the traits studied. Diet did not affect feed intake, egg production, FCR, or BW gain. Eggs were larger (P < 0.01) in hens fed the barley diet than in hens fed the corn or the wheat diet, probably because of greater level of supplemental fat of the barley diet. Dietary treatment did not affect any egg quality trait (P > 0.05). The GMD of the diet did not affect any variable studied. In summary, barley or wheat can substitute the corn in diets for laying hens supplemented with enzymes without any adverse effect on productivity. Consequently, the election of the main cereal of the diet will depend primarily on their relative cost. Within the range studied, screen size did not have any effect on hen productivity. | |
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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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New Orleans, Louisiana |
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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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11/07/2016 |
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Fecha fin congreso
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14/11/2016 |
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Desde la página
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94 |
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Hasta la página
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94 |
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Título de las actas
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Influence of particle size of the main cereal of the diet on egg production of brown laying hens. |