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      Desempenho e qualidade de ovos de poedeiras de 50 a 66 semanas de idade suplementadas com probiótico Translated title: Performance and EGG quality from 50 to 66-weeks-old-laying-hens supplemented probiotic

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          Abstract

          Objetivou-se, com este trabalho, avaliar o efeito de probiótico sobre o desempenho e qualidade de ovos de poedeiras. A suplementação de probiótico foi iniciada na fase de recria e os efeitos foram avaliados de 50 a 66 semanas. O delineamento experimental adotado foi inteiramente ao acaso com quatro tratamentos (suplementação de probiótico na fase de recria e postura, suplementação de probiótico somente na fase de recria, suplementação de probiótico somente na fase de postura e ausência de suplementação) e seis repetições de oito aves cada. Nas fases de recria e postura, as rações continham 15,50 e 17,00% de proteína bruta e 2800 e 2750kcal de energia metabolizável/kg. Os resultados de consumo de ração (106,53, 110,81, 107,25, 109,72g), produção de ovos (85,20, 83,66, 79,18, 81,94%), peso de ovos (59,84, 60,53, 61,11, 60,33g), conversão alimentar por dz (1,50, 1,59, 1,64, 1,61) e por kg (2,09, 2,19, 2,24, 2,22), espessura de casca (0,387, 0,384, 0,386, 0,381mm), porcentagem de casca (9,44, 9,43, 9,37, 9,31%), unidade Haugh (92,50, 93,14, 91,34, 91,57) e gravidade específica (1,0856, 1,0851, 1,0850, 1,0839) não indicaram qualquer diferenças entre os tratamentos (P>0,05). A utilização do Bacillus subtilis como agente probiótico, quando utilizado a partir da recria, da postura ou durante as duas fases, não possibilita melhoras no desempenho e qualidade de ovos de poedeiras de 50 a 66 semanas de idade.

          Translated abstract

          The experiment was carried out to evaluate probiotic on laying hen performance and egg quality. The probiotic was fed from pullet phase and the effects were evaluate from 50 to 66 weeks. A completely randomized experimental design with four treatments (probiotic suplementation in pullet and laying phase, probiotic suplementation only in pullet phase, probiotic suplementation only in laying phase and no suplementation), and six replicates of eight birds each was used. The rations contained 15.50 and 17.00% crude protein and 2800 and 2750kcal metabolizable energy/kg respectively in pullet and laying phases. The results of feed intake (106.53, 110.81, 107.25, 109,72g), egg production (85.20, 83.66, 79.18, 81.94%), egg weight (59.84, 60.53, 61.11, 60.33g), alimentary conversion per dz (1.50, 1.59, 1.64, 1.61), and per kg (2.09, 2.19, 2.24, 2.22), shell thickness (0.387, 0.384, 0.386, 0.381mm), shell percent (9.44, 9.43, 9.37, 9.31%), Haugh unit (92.50, 93.14, 91.34, 91.57) and specific gravity (1.0856, 1.0851, 1.0850, 1.0839) did not indicate any treatment effect (P>0.05). The utilization of Bacillus subtilis as probiotic during pullet phase, laying phase or pullet and laying phases did not improve the performance and egg quality of laying hens from 50 to 66 weeks of age.

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          Most cited references18

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          Nutrient Requeriments of Poultry

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            Production variables and nutrient retention in single comb White Leghorn laying pullets fed diets supplemented with direct-fed microbials.

            Two experiments were carried out for six and seven 28-d periods, respectively, with DeKalb XL Single Comb White Leghorn laying pullets to ascertain the effect of feeding 1,100 mg Lactobacillus (Lacto)/kg diet (ppm) and 2,200 ppm Lacto diets, and the supplementation of these diets with 1 and 3% fat, on layer performance and nitrogen, calcium, and phosphorus retention. The dietary treatments were corn-soybean meal (C-S) control, C-S plus condensed cane molasses solubles (CCMS)-1,100 ppm Lacto (4.4 x 10(7) cfu/mg Lacto), and C-S plus CCMS-2,200 ppm Lacto (8.8 x 10(7) cfu/mg Lacto) without fat (Experiment 1) and without and with 1 and 3% supplemental fat to each Lacto level (Experiment 2). In both experiments, layers fed the 1,100 ppm Lacto diets had better (P < .05) hen-day production, daily feed consumption, egg mass, egg weight, egg size, and feed conversion than layers fed diets without Lacto. Egg mass, interior egg quality, and feed conversion (Experiment 1), mean body weight gains, and nitrogen, calcium, and phosphorus retention (Experiment 2) were further improved (P < .05) with feeding 2,200 ppm Lacto diets. Feeding Lacto diets with 1% fat provided (P < .05) larger eggs and better (P < .05) nitrogen and phosphorus retention, whereas 3% fat decreased (P < .05) feed consumption and nutrient retention and improved (P < .05) feed conversion and body weight gain. Positive correlations between Lacto diets and nitrogen and calcium retentions, daily feed consumption, and egg size were observed. Feeding 1,100 ppm Lacto diets to layers stimulated appetite and improved egg production, egg mass, egg weight, egg size, and feed conversion. Addition of fat to Lacto diets reduced daily feed consumption and provided better feed conversion, egg masses, egg sizes, body weight gains, and nutrient retentions.
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              The effect of Lactobacillus acidophilus on the production and chemical composition of hen's eggs.

              Laying hens were fed for a 48-wk period with a basal diet supplemented with a selected strain of Lactobacillus acidophilus at levels up to four million viable cells per gram of feed. Levels of egg production and feed conversion were significantly higher (8 and 14.8%, respectively) than in the control flock, and cholesterol values in yolks were decreased by 18.8%. It is suggested that the latter effect was a reflection of lower serum cholesterol concentrations in treated birds; a maximum reduction of over 55% followed incorporation of the culture into the feed. The level of viable cells in the feed was confirmed as being critical to register the above effects.
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                Author and article information

                Journal
                cr
                Ciência Rural
                Cienc. Rural
                Universidade Federal de Santa Maria (Santa Maria, RS, Brazil )
                0103-8478
                1678-4596
                August 2001
                : 31
                : 4
                : 683-686
                Affiliations
                [01] orgnameUniversidade de São Paulo orgdiv1Departamento de Produção Animal adrianap@ 123456carpa.ciagri.usp.br
                [02] orgnameUniversidade de São Paulo orgdiv1Departamento de Zootecnia
                Article
                S0103-84782001000400020 S0103-8478(01)03100420
                4b1ecf72-e0e8-45d3-85e8-8a51cc97917e

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 27 June 2000
                : 07 November 2000
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 20, Pages: 4
                Product

                SciELO Brazil

                Self URI: Texto completo somente em PDF (PT)
                Categories
                Produção Animal

                desempenho,qualidade de ovos,probiótico,poedeiras,Bacillus subtilis,performance,laying hen,egg quality

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