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...
The present study aimed to ascertain the effects of slow-growing breeder age on embryo development, incubation results, and chick quality and of the interaction between breeder age and hatching time on initial performance. A total of 630 hatching eggs obtained from a commercial flock of slow-growing broiler breeders (Isa Label Naked Neck) were evaluated in 2 experiments. The first experiment evaluated embryo development and hatching results for broiler breeder age treatments of 38 and 51 wk, whereas the second experiment evaluated broiler chick performance. For the second experiment, chicks were distributed in a 2 x 2 factorial randomized block (sex) experimental design consisting of 2 breeder ages (31 or 58 wk) and 2 hatching times (479–485 and 491–497 h). At 18 d of embryonic development, embryos of 51-wk-old breeders were larger than those of 38-wk-old breeders ( P < 0.05), whereas yolk-free chick weight was similar ( P > 0.05). Embryo organ weight was similar for the 2 breeder ages ( P > 0.05); however, there was greater development of intestinal villi for embryos of the 51-wk-old breeders. There were no differences between breeder ages in hatchability and chick quality score ( P > 0.05). Yolk-free chick weight at pulling was greater ( P < 0.05) for chicks from 51-wk-old breeders. Hatching time did not affect performance from 1 to 7 d ( P > 0.05); however, chicks hatching at 491–497 h had better performance from 1 to 28 d than did chicks hatching at 479–485 h ( P < 0.05). In conclusion, the age of slow-growing breeders affects embryo villi development and chick weight but does not improve incubation results or chick quality. Chicks hatching later (491–497 h) had better performance results than chicks hatching earlier (479–485 h).
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.
RESUMOAvaliou-se o efeito da suplementação de mananoligossacarídeo, ß-glucano e antibiótico em dietas de leitões machos castrados, durante a fase de creche (21 aos 54 dias de idade), sobre o desempenho, características morfo-histológicas da mucosa intestinal e ocorrência de diarreia. Foram utilizados 368 leitões de mesma linhagem, distribuídos em delineamento inteiramente ao acaso, com quatro tratamentos (1: 330g de mananoligossacarídeo t/ração (oriundos do núcleo), 2: 1.830g de mananoligossacarídeo t/ração (330g oriundos do núcleo + 1.550g da suplementação), 3: 330g de mananoligossacarídeo (oriundos do núcleo) + 500g de ß-glucano t/ração e 4: 330g de mananoligossacarídeo (oriundos do núcleo) + 250g de Colistina t/ração) e quatro repetições com 23 animais por unidade experimental. O desempenho foi avaliado pelo 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 a relação altura de vilosidade:profundidade de cripta do duodeno, jejuno e íleo. A ocorrência de diarreia foi observada diariamente pela avaliação de escore fecal. A suplementação de mananoligossacarídeo, β-glucano e antibiótico na dieta de leitões machos castrados, na fase de creche, não influenciaram o desempenho e a ocorrência de diarreia. Maior altura de vilosidade e maior profundidade de criptas no duodeno e íleo foram verificadas nos animais suplementados com ß-glucano. No jejuno foi observado maior perímetro de vilosidade nos animais suplementados com ß-glucano e nos animais que não receberam suplemento adicional na dieta.Palavras-chave: aditivo, desmame, diarreia, microingrediente nutricional, morfometria intestinal ABSTRACT The aim of this study was to evaluate the effect of supplementation with mannan oligosaccharides, ß-glucan and antibiotic in diets for castrated male piglets during the nursery phase (21 to 54 days of age) on performance, morpho-histological characteristics of the intestinal mucosa and occurrence of diarrhea. A total of 368 piglets of the same strain, distributed in a completely randomized design with four treatments (1-330 g mannan oligosaccharides/t of diet (derived of nucleus); 2 -1,830 g mannan oligosaccharides/t of diet (330g derived of nucleus + 1550g of supplementation); 3 -330g mannan oligosaccharides (derived of nucleus) + 500g ß-glucan/t of diet; and 4 -330g mannan oligosaccharides (derived of nucleus) + 250g colistin/t of diet
ResumoCom o objetivo de avaliar a qualidade de ovos férteis e o nascimento de pintinhos em dois diferentes sistemas de coleta de ovos, manual e automático, foi realizado o estudo a partir de dados de campo de uma empresa avícola situada em MT. Foram avaliados 18060 ovos oriundos de matrizes pesadas com idades de 35 a 45 semanas. Foram avaliados no incubatório a
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