RESUMOAvaliou-se a composição química e a resistência óssea do tibiotarso de frangos de corte aos 21 dias de idade. Foram determinados os percentuais ósseos de proteínas colagenosas (PC) e proteínas não colagenosas (PNC) e de cálcio, fósforo, potássio e sódio. Foram utilizados 650 pintinhos machos de marca comercial, alimentados com dietas à base de milho e farelo de soja. Foi utilizado delineamento em blocos ao acaso com cinco repetições e 26 aves por unidade experimental. Os tratamentos consistiram na suplementação da dieta basal com NH 4 Cl a fim de se obter cinco níveis -50; 0; 50; 100 e 150mEq/kg de balanço eletrolítico (BE). O nível de BE influenciou os teores de fósforo, potássio, sódio, PC e PNC, relação Ca:P e a resistência à quebra. A redução do balanço eletrolítico da dieta em nível inferior a 150mEq/kg influenciará negativamente a mineralização e a resistência óssea. A resistência à quebra do tibiotarso não está correlacionada com as concentrações dos minerais de forma individual, mas correlaciona-se negativamente com as concentrações de proteínas colagenosas e não colagenosas.Palavras-chave: frango de corte, acidose metabólica, balanço eletrolítico, tibiotarso 0; 50; 100 and 150mEq/kg) (Williams et al., 2004). A biologia do esqueleto vem sendo objeto de pesquisa há vários anos, principalmente ABSTRACT This study was carried out in order to evaluate the bone chemical composition and breaking force resistance of tibiotarsus birds at 21 days of age. The bone percentage of colagenous proteins (CP), non colagenous proteins (NCP) and minerals (calcium, phosphorus, potassium and sodium) was analyzed. A total of 650 commercial male broiler chicks were fed corn and soybean diets. A completely randomized block design with five replications of 26 birds per experimental unit was used. The treatments consisted of the basal ration supplemented with NH 4 Cl in order to obtain five levels
O presente trabalho teve como objetivo determinar a prevalência de Salmonella sp. em suínos abatidos em frigoríficos sob Inspeção Federal no Estado de Mato Grosso. Amostras de linfonodos mesentéricos e tonsilas de diferentes procedências foram coletadas em três frigoríficos. Das 300 amostras processadas, 50 (16,6%) foram positivas para Salmonella sp., sendo identificados 14 diferentes sorovares. Os sorovares mais freqüentes foram Derby (16%), Typhimurium (14%), London (12%) e Give (12%). Os resultados epidemiológicos obtidos mostram uma baixa prevalência desta bactéria quando comparados com os resultados de estudos realizados em outros Estados.
RESUMO:Avaliou-se o efeito da suplementação de mananoligossacarídeo isolado e associados com ß-glucano e antibiótico em dietas de leitoas durante a fase de creche (21 aos 54 dias de idade) sobre o desempenho, características morfo-histológicas da mucosa intestinal e ocorrência de diarréia. Foram utilizadas 368 leitoas de mesma linhagem, com peso médio de 6,5 kg/unidade experimental, distribuídas em delineamento inteiramente casualizado com quatro tratamentos: 1 -Dieta controle Dieta basal -sem suplementação, 2 -Dieta basal + 1500 g de mananoligossacarídeo ton/ração, 3 -Dieta basal + 500 g de ß-glucano ton/ração e 4 -Dieta basal + 250g Colistina ton/ração, com quatro repetições cada e 23 animais por unidade experimental. O desempenho foi avaliado pelo peso corporal, ganho de peso, consumo de ração e conversão alimentar. As características morfo-histológicas da mucosa intestinal estudadas foram altura de vilosidade, profundidade das criptas intestinais, perímetro de vilosidade e relação altura de vilosidade:profundidade de cripta do duodeno, jejuno e íleo. A ocorrência de diarréia foi observada diariamente pela avaliação da consistência das fezes. Os animais com a dieta contendo a suplementação de mananoligossacarídeo apresentaram melhora de 6,68% no ganho de peso comparada aos demais tratamentos. A utilização de MOS não apresentou diferença (<0,05) na conversão alimentar. Os tratamentos não influenciaram o consumo de ração, incidência de diarreia e as características da morfo-histológicas intestinais. A suplementação de mananoligossacarídeo proporcionou os melhores resultados de ganho de peso e peso final em leitoas de linhagem comercial no período de 21 a 54 dias de idade. Palavras-chave: aditivo; desmame; diarréia; microingredientes nutricionais; morfometria intestinal PERFORMANCE AND MORPHO-INTESTINAL CHARACTERISTICS OF WEANED GILTS FED DIETS CONTAINING COMBINATIONS WITH MANNAN OLIGOSACCHARIDES ABSTRACT:In this study, we evaluated the effect of supplementing mannan oligosaccharides (MOS) solely or combined with ß-glucan and an antibiotics in diets for gilts in the nursery phase (21 to 54 days of age) on the performance, morphohistological characteristics of the intestinal mucosa and occurrence of diarrhea. Three-hundred and sixty-eight gilts from the same strain, with average weight of 6.5 kg/experimental unit, were distributed in a completely randomized design with four treatments: 1 -Control diet (basal diet): no supplementation; 2 -Basal diet + 1,500 g MOS/t of diet; 3 -basal diet + 500 ß-glucan/t of diet; and 4 -Basal diet + 250 g colistin/t of diet, with four replicates each and 23 animals per experimental unit. The performance was evaluated through the body weight, weight gain, feed intake and feed conversion. The morphohistological characteristics of the intestinal mucosa analyzed were villus height, intestinal crypt depth, villus perimeter and villus height:crypt depth ratio of the duodenum, jejunum and ileum. The occurrence of diarrhea was observed daily by evaluating the consistency of feces. The ani...
In order to evaluate the growth performance of broiler chickens at two different facilities, conventional aviaries (with positive ventilation) and avian dark house (with negative ventilation dark curtain), this study was conducted, from data field of a poultry company located in a region with a warm climate in state of Mato Grosso, Brazil. Was evaluated the performance of broilers by body weight, weight gain, feed intake, feed conversion, mortality and incidence of foot calluses. The results showed that broilers reared in dark house sheds system presented better performances for final weight, weight gain, feed intake and feed conversion. Significant reduction in the incidence of foot callus of chickens reared in conventional sheds. Regarding mortality while creating, there was no significant difference between the two technologies. So the best system, regarding zootechnical results for the keeping of chickens in hot region is the dark house system.
Questionnaires answered by 476 students (age 15-20 yrs) attending a local school in the neighborhood of Pedra 90 in Cuiabá -MT were analyzed in order to study the characteristics of feline and canine populations in the region. The results showed that 371 (78%) of the 476 families kept 513 dogs and 307 cats. Of 573 dogs, 289 (56.3%) were male and 224 (43.7%) were female. Of 307 cats, 182 (59.28%) were male and 125 (40.72%) were female. The owners of 474 (92.4%) dogs and 267 (86.9%) cats reported that their pets had been vaccinated against rabies.
An experiment was conducted to evaluate the effects of phytase (PHY), alone or in combination with citric acid (CA), on growing Japanese quails under moderate and severe phosphorus (P) restriction. For this, 504 one-day-old female quails were distributed in a completely randomised design with seven treatments and six replications. Treatments consisted of the following diets: (a) positive control (PC): formulated according to quails nutritional requirements; (b) negative control 40% (NC 40 ): PC with 40% less aP; (c) NC 40 +PHY; (d) NC 40 +PHY+CA; (e) negative control 65% (NC 65 ): PC with 65% less aP; (f) NC 65 +PHY; (g) NC 65 +PHY+CA. Phytase and CA were included at 300 FTU/kg and 40 g/kg, respectively. Performance, bone mineralization and plasma mineral concentration were evaluated at day 35; calcium (Ca) and P metabolism, between days 36 and 39. No significant differences in performance, plasma Ca and Pwere detected between quails fed PC or NC 40 ; however, NC 40 decreased tibia ash (p < 0.01). Treatment NC 65 impaired daily weight gain (p = 0.01), tibia ash (p < 0.01), and tibia optical densitometry (p = 0.03), as well as modified plasma Ca (p < 0.01) and P (p = 0.03) concentrations when compared to PC. Both NC 40 and NC 65 reduced P excretion (p < 0.01). Phytase alone restored tibia ash of NC 40 quails to regular rates. Nevertheless, only PHY and CA combined returned plasma P, tibia ash, tibia optical densitometry, and daily weight gain of quails fed NC 65 to similar values as those observed in PC. In conclusion, PHY alone suppresses the negative effects of moderate P restriction in growing Japanese quails, but fails in this task under severe P restriction. In such a situation, only the combination of PHY and CA ensures regular rates of growth and bone mineralization. This concept should be better explored by producers in order to take full advantage of the reduction in P excretion achieved by lowering dietary P concentrations. K E Y W O R D S bone densitometry, citrate, organic acid, phytase, quail S U PP O RTI N G I N FO R M ATI O N Additional supporting information may be found online in the Supporting Information section at the end of the article. How to cite this article: Vieira BS, Caramori Junior JG, Correa GSS, et al. Combination of phytase and citric acid, but not phytase alone, ensures regular rates of growth and bone mineralization in quails under severe phosphorus restriction.
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