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Descripción
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| An experiment was conducted to study the effects of inclusion of an insoluble fiber source (0 vs 3% sunflower hull; SFH) in commercial starter diet for broilers and pullets on the pH of the different organs of the gastrointestinal tract (GIT) of broilers and pullets at 7 and 21 d of age. In total, 280 one-day-old female broilers (Cobb 500) and 280 one-day-old pullets (Lohmann Brown) were used. Each treatment (2 fiber levels × 2 type of diets × 2 type of birds) was replicated 7 times and the pH of the different segment of the small intestine (SI) was measured in 2 birds at each age. The diets were based on wheat and soybean meal and contained 3,000 kcal AMEn/kg and 9.2% NDF in the control broiler diet and 2,900 kcal AMEn/kg and 11.0% NDF in the control pullet diet. The fiber diets included 3% SFH at the expense (wt:wt) of the control diets. The data were analyzed as a completely randomized design with main effects and their interactions. Treatment means were separated by using t-test. No interactions between type of bird or type of diet and fiber inclusion were detected for any organ pH at any age (P > 0.05). At 7 d of age the pH of the crop and the different segments of the SI was higher and that of the gizzard was lower in pullets than in broilers (P < 0.01). Also at this age, the pH of the different segments of the SI decreased in birds fed the pullet diet (P < 0.01) but no differences were detected in the gizzard. Fiber inclusion had little effect on organ pH at this age. At 21 d of age the pH of the SI was higher in pullets than in broilers (P < 0.05) and lower for birds fed the pullet diet than for birds fed the broiler diet (P < 0.05). Fiber inclusion reduced gizzard pH at 21 d of age (P < 0.01). It is concluded that at same age, the pH of the digestive organs differ between broilers and pullets. Also, digesta pH is affected at different extent by fiber inclusion, depending on the organ and type of bird considered. | |
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Internacional
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Nombre congreso
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Poultry Science Association 103rd Annual Meeting |
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Tipo de participación
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970 |
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Lugar del congreso
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Corpus Christi, Texas |
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Revisores
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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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14/07/2014 |
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Fecha fin congreso
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17/07/2014 |
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Desde la página
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141 |
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Hasta la página
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141 |
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Título de las actas
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Poultry Science Association 103rd Annual Meeting |