Mananoligossacarídeos e complexo enzimático em dietas para frangos de corte

Oliveira, Maria Cristina de; Cancherini, Luciana Cardoso; Marques, Rafael Henrique; Gravena, R. A.; Moraes, Vera Maria Barbosa de

doi:10.1590/s1516-35982009000500014

Cited by 14 publications

(7 citation statements)

References 25 publications

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“…Oliveira et al (2009), Appelt et al (2010), and Khosravi et al (2010) in experiments using a probiotic, a prebiotic, and an organic acid, respectively, also did not show any WG differences during the period of 1-42 days. Godoi et al (2008), Salazar et al (2008), and Meurer et al (2010) observed higher WG in broiler chickens fed prebiotic/symbiotic, organic acids, and probiotic, respectively, compared with controls, considering the period between one and 42 days of age.…”

Section: Resultsmentioning

confidence: 83%

Intestinal integrity and performance of broiler chickens fed a probiotic, a prebiotic, or an organic acid

Fernandes

Martins

Mendes

et al. 2014

Rev. Bras. Cienc. Avic.

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KeywordsScanning electron microscopy, morphometrics, intestinal mucosa, intestinal wall.Submitted: May/2013 Approved: February/2014 ABStRACt This study aimed at evaluating the intestinal integrity, using light and scanning electron microscopy (SEM), and the performance of broiler chickens fed additives alternative to antimicrobials. A total of 1080 male chicks were distributed according to a completely randomized experimental design, with six treatments with six replicates of 30 birds each. The following treatments were evaluated: basal diet (control), basal diet supplemented with an antimicrobial, basal diet supplemented with a probiotic, basal diet supplemented with a prebiotic, basal diet with a symbiotic, and basal diet supplemented with organic acids. Weight gain, feed intake, feed conversion ratio and livability were recorded when broiler chickens were 10, 21, 35, and 42 days old. On day 42, 72 birds were individually weighed and sacrificed. In order to evaluate the morphometrics of the different intestinal wall layers, segments of the small intestine and the cecum were collected from two birds per replicate, and intestinal integrity (SEM) was evaluated in the same segments of two birds per treatment. During the starter period (1-21 days old), birds fed the alternative additives presented similar weight gain as those fed the antimicrobial product, but were not different from control birds. Feed conversion ratio of birds fed alternative additives was better than that of the control birds from one to 10 days of age, but not during the remaining rearing period, and was similar to the birds receiving the antimicrobial. The morphometric parameters of the different intestinal wall layers was not influenced by the treatments. During the total rearing period, the evaluated alternative additives did not improve intestinal integrity or broiler performance.

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Section: Resultsmentioning

confidence: 83%

Intestinal integrity and performance of broiler chickens fed a probiotic, a prebiotic, or an organic acid

Fernandes

Martins

Mendes

et al. 2014

Rev. Bras. Cienc. Avic.

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“…Silva et al (2009) evaluated the effect of yeast extract on the performance of broiler chickens and observed a better food conversion within the period from 1 to 21 days. Several studies have been carried out with another additive that deserves prominence in the scientific literature, the prebiotics (Albino et al, 2006;Oliveira et al 2007Oliveira et al , 2009Godoi et al, 2008). It is known that the main form of action of the prebiotics is to favor the growth of benefic microbial populations, enhancing luminal conditions, anatomical characteristics of the gastrointestinal tract and immune system and also, in some cases, by enhancing the animal performance (Silva & Nörberg, 2003).…”

Section: Introductionmentioning

confidence: 99%

Yeast extract and prebiotic in pre-initial phase diet for broiler chickens raised under different temperatures

Silva

Gravena

et al. 2010

R. Bras. Zootec.

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-The objective of this research was to evaluate the performance, carcass yield and intestinal morphometry of broiler chickens raised under different temperatures that received feed with or without yeast extract and prebiotic in the pre-initial phase. One thousand four hundred and forty one-day old male chicks were used, raised in different climate chambers.Feed with or without the addition of yeast extract and prebiotic was offered only in the pre-initial phase (1 to 7 days). From the eighth day on, every chick received the same feed, readjusted according to usual recommendations. A randomized complete experimental design was used in a 3 × 2 × 2 factorial arrangement, consisting of three environmental temperatures (hot, comfort and cold) and two levels of yeast extract (with or without) and prebiotic (with or without). The performance of the birds was evaluated considering weight gain, feed intake, food conversion and viability at 42 days of age. Carcass yield and intestinal morphometry were also evaluated. Environmental heat impaired performance and carcass yield. Prebiotic inclusion in the pre-initial feed increased weight gain and enhanced food conversion of birds raised under hot conditions. The inclusion of products in the feed of broiler chickens raised in hot and cold environments has beneficial effects on chicken intestinal villi.Key Words: carcass yield, heat stress, intestinal morphometry, mannanoligosaccharides, performance, Saccharomyces cervisiae Extrato de leveduras e prebiótico na dieta pré-inicial de frangos de corte criados em diferentes temperaturasRESUMO -Objetivou-se nesta pesquisa avaliar o desempenho, o rendimento de carcaça e a morfometria intestinal de frangos de corte criados em diferentes temperaturas e que receberam na fase pré-inicial ração contendo ou não extrato de leveduras e prebiótico. Foram utilizados 1.440 pintos machos de 1 dia de idade, criados em diferentes câmaras climáticas. As rações, acrescidas ou não de extrato de leveduras e prebiótico, foram oferecidas somente na fase pré-inicial (1 a 7 dias). A partir do oitavo dia, todas as aves receberam a mesma ração, reajustada de acordo com as recomendações usuais. Adotou-se o delineamento experimental inteiramente casualizado em arranjo fatorial 3 × 2 × 2, composto de três temperaturas de criação (calor, conforto e frio) e dois níveis de extrato de leveduras (com ou sem) e prebiótico (com ou sem). O desempenho das aves foi avaliado considerando o ganho de peso, o consumo de ração, a conversão alimentar e a viabilidade aos 42 dias de idade.Também foram avaliados o rendimento de carcaça e a morfometria intestinal. O calor ambiente prejudicou o desempenho e o rendimento de carcaça. A inclusão de prebiótico na ração pré-inicial aumentou o ganho de peso e melhorou a conversão alimentar das aves criadas no calor. A inclusão dos produtos na ração de frangos de corte criados em ambiente de calor e no frio tem efeito benéfico sobre as vilosidades das aves.

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“…The collaborators Bonapaz et al (2010) noted a reduction in the thickness of the intestinal wall within the group of broilers deliberately infected with microorganisms in relation to the control group. The exogenous enzymes stimulate the intestinal mucosa through reducing the quantity of substrate available for bacterial growth, as a lower quantity of substrate results in a lower quantity of bacteria (OLIVEIRA et al, 2009). The broilers fed on feed without enzymatic complex had, quite possibly, a higher bacterial load in their intestine, which may have caused a reduction in the thickness of the wall.…”

Section: Resultsmentioning

confidence: 99%

“…Through the supply of the enzymatic complex, there was an observed decrease to the width in the ileus, when compared to the diets without enzymatic complex, which indicates that the exogenous enzymes were active in this region, reducing the adverse effects of the NSPs, as for example on the viscosity and proliferation of opportunist microorganisms. The exogenous enzymes act in a way that benefits the mucosa by means of reducing the viscosity of diets rich in soluble non-starch polysaccharides, and the breakdown of substrates that would be used for the proliferation of opportunist bacteria in this segment of the intestine (OLIVEIRA et al, 2009). The collaborators Harvatovic et al (2015) after assessing the inclusion of exogenous enzymes to diets with sunflower meal, which possesses large quantities of soluble SNP, observed that the viscosity of the digesta increased from the proximal to the distal of the intestine, and that the activity of the enzymatic complex was more effective in the reduction of viscosity in the ileus.…”

Section: Resultsmentioning

confidence: 99%

Enzyme complex and Saccharomyces cerevisiae in diets for broilers in the initial phase

Sousa

Dourado

Biagiotti

et al. 2018

Rev. bras. saúde prod. anim.

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SUMMARY This study aimed at evaluating the use of exogenous enzymes in diets with Saccharomyces cerevisiae and their impact on zootechnical performance, carcass yield, intestinal histomorphometry and of broiler diets in the initial phase. A completely randomized design was used in a 2×3 + 1 factorial arrangement, with two levels of enzyme complex (EC), (0 and 200g / ton), three yeast levels (0, 6 and 12%) and a control diet, making up seven treatments, with five replicates of 20 broilers per experimental unit. We evaluated the performance (feed intake, weight gain and feed conversion ratio), carcass yield and cuts, histomorphometry of the small intestine (height, circumference and width of villi, height and width of the crypt, thickness of the intestinal muscle wall and villi/crypt relationship). From 1 to 7 and 1 to 21 days, the inclusion of yeast led to reduced broiler performance. At 21 days, the addition of EC resulted in an increase of (p <0.05) in the thickness of the muscular wall of the duodenum and decreased the width of the crypt in the ileum. The 12% level of yeast without the EC provided a thicker jejunum intestinal muscle wall when compared to the positive control. There was no significant effect on carcass yield and cuts between treatments. In conclusion, the inclusion of yeast reduces performance from 1-21 days. The enzyme complex and yeast does not change the performance or carcass yield, however, it does bring benefits to the intestinal mucosa.

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Mananoligossacarídeos e complexo enzimático em dietas para frangos de corte

Cited by 14 publications

References 25 publications

Intestinal integrity and performance of broiler chickens fed a probiotic, a prebiotic, or an organic acid

Intestinal integrity and performance of broiler chickens fed a probiotic, a prebiotic, or an organic acid

Yeast extract and prebiotic in pre-initial phase diet for broiler chickens raised under different temperatures

Enzyme complex and Saccharomyces cerevisiae in diets for broilers in the initial phase

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