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Descripción
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| A trial was conducted to test the effect of micronization (very fine grinding) of soybean meal (SBM) and fullfat soybean (FFSB) on the coefficient of ileal apparent (CIAD) and ileal true digestibility (CITD) of amino acids (AA) in 23-day-old broilers. The experiment was conducted as a completely randomized block design with 4 treatments arranged factorially (SBM and FFSB; micronized and ground) and 6 replicates (8 chicks) per treatment. The mean particle size (MPS) was 47 and 881 ?Ìm for the SBM and 41 and 778 ?Ìm for the FFSB, micronized and ground, respectively. The diets were based on corn starch and sucrose and the test ingredient was the unique source of CP (200 g/kg). In addition, a nitrogen free diet was formulated to estimate the basal ileal endogenous losses of the AA. Chicks were fed a commercial corn-SBM diet from 1 to 19 days and then, they received their respective experimental diets from 20 to 23 days of age ad libitum in mash form. Chicks fed SBM had higher CIAD organic matter (0.846 vs. 0.832; P ¡Ü 0.001), CP (0.856 vs. 0.841; P ¡Ü 0.05), and of most essential AA (0.882 vs. 0.864 for arginine; 0.895 vs. 0.845 for leucine; 0.880 vs. 0.853 for methionine and 0.866 vs. 0.843 for valine; P ¡Ü 0.05) and tended to have higher CIAD of threonine (P ¡Ü 0.10) than chicks fed FFSB. In addition, chicks fed SBM had higher CITD of CP (P ¡Ü 0.05), leucine, methionine, and valine (P ¡Ü 0.01) than chicks fed FFSB. Particle size did not affect the ileal digestibility of CP or the essential AA. It is concluded that chicks fed soybean meal had higher ileal digestibility of amino acids than chicks fed fullfat soybean and that fine grinding of the soy protein sources does not improve the ileal digestibility of amino acids. | |
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Internacional
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Si |
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Nombre congreso
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Joint ADSA-ASAS 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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Indianapolis, Estados Unidos |
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Revisores
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Si |
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ISBN o ISSN
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0021-8812 |
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DOI
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Fecha inicio congreso
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07/07/2008 |
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Fecha fin congreso
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11/07/2008 |
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Desde la página
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448 |
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Hasta la página
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448 |
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Título de las actas
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Journal of Animal Science |