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Descripción
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| The effects of including 3% sunflower hulls (SFH) in the diet on performance, TTAR of nutrients, ileal mucosa morphology, and volatile fatty acid (VFA) concentration in the ceca were studied in birds from 1 to 21 d of age. There were 4 treatments organized as 2 × 2 factorial with 2 chicken lines (broilers vs. pullets) and 2 levels of SFH (0 vs. 3%). Each treatment was replicated 7 times (10 birds). The wheat-soybean meal control diet contained 2,900 kcal AMEn/kg, 0.96% digestible Lys, and 10.8% NDF. In the experimental diet, SFH was included at the expense (wt:wt) of the control diet. Diets were offered in mash form. No interactions between main effects were detected for any trait. ADFI, ADG, and feed conversion ratio (FCR) were better (P < 0.001) in broilers than in pullets. At 7 d of age SFH improved ADG (P < 0.05) and ADFI (P < 0.001) but did not affect FCR. The TTAR of DM, OM, and N was higher (P < 0.001) at 7 d and that of gross energy and the AMEn of the diet were higher at 7 and 21 d (P < 0.01) in broilers than in pullets. At 21 d, SFH inclusion improved (P < 0.05) TTAR of all nutrients and the AMEn of the diet. Compared with pullets, broilers had greater (P < 0.05) villus height, crypt depth, and total VFA concentration per g of fresh digesta with higher proportion of butyrate and lower of acetate. In conclusion, broilers fed a pullet diet grew faster, had better TTAR of nutrients, and higher concentration of VFA than pullets. Villus structure of the broilers was better adapted for nutrient absorption than that of pullets. The inclusion of SFH increased TTAR of nutrients and AMEn of the diet and improved growth performance of birds from 1 to 7 d but not thereafter. | |
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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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970 |
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Lugar del congreso
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Louisville, Kentucky |
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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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27/07/2015 |
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Fecha fin congreso
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30/07/2015 |
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Desde la página
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149 |
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Hasta la página
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150 |
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Título de las actas
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Effect of dietary sunflower hulls on nutrient digestibility, ileal morphology, and volatile fatty acid concentration in broilers and pullets fed a pullet diet from 1 to 21 days of age. |