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Descripción
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| In total, 480 Lohmann brown-egg laying hens were used to study the inclusion of raw glycerin (Gly), a by-product of the ethanol industry, and lecithin, a by-product of the biodiesel industry, on productive performance and egg quality. There were 6 diets based on corn, soybean meal with 4% supplemental fat that contained 2,750 kcal AMEn/kg, 16.5% CP, and 0.73% digestible Lys. The diets were arranged as a 2 × 3 factorial with 2 levels of glycerol (0 and 7%) and 3 levels of lecithin (0, 2, and 4%). In these diets lecithin substituted same amount of animal fat. Each treatment was replicated 8 times and the experimental unit was a cage with 10 hens. Productive performance was recorded by replicate every 28-d and cumulatively from 23 to 47 wk of age. Egg quality was measured in 12 eggs per replicate, chosen at random from eggs produced the last 2 d (n = 6) of each of the 6 periods. The data were analyzed as a completely randomized design and main effects (glycerol and lecithin level) and the interactions were determined. Productive performance and egg quality traits were not affected by the inclusion of Gly in the diet except for FCR per kilogram of eggs and BW gain that were reduced when hens were fed the diets containing 7% Gly (P < 0.01). The substitution of animal fat by lecithin increased egg weight (59.6 vs. 61.3 g) and egg mass production (56.6 vs. 58.8 g) and improved FCR per kilogram of eggs (2.076 vs. 2.024) (P < 0.01). However, feed intake, egg production, and BW gain were not affected. Also, yolk color was increased when lecithin was included in the diet. It is concluded that the inclusion in the diet of up to 4% lecithins as a replacement of animal fat improved egg production and egg quality whereas the inclusion glycerol at a level of 7% reduced feed efficiency and BW gain. | |
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Internacional
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Si |
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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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960 |
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Lugar del congreso
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Corpus Christi, Texas |
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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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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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48 |
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Hasta la página
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48 |
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Título de las actas
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Poultry Science Association 103rd Annual Meeting |