Uso de prebióticos à base de mananoligossacarídeo em rações para frangos de corte

O experimento foi realizado com objetivo de estudar o uso de mananoligossacarídeos (standard e concentrado) em rações para frangos de corte. Foram utilizados 1.080 pintos de corte machos da marca Ross, com peso médio inicial de 42 g, distribuídos em um delineamento inteiramente ao acaso, com seis tratamentos e nove repetições de 20 aves por unidade experimental. As aves foram criadas em cama de maravalha reaproveitada, utilizada anteriormente por outro lote. Foram testados os tratamentos: testemunha, antibiótico (avilamicina), mananoligossacarídeo alta concentração (MOS AT), mananoligossacarídeo standard (MOS ST), MOS AT + avilamicina e MOS ST + avilamicina para avaliação do ganho de peso, do consumo de ração, da conversão alimentar, da viabilidade e do rendimento de cortes. No período de 1 a 21 dias de idade, não foram encontradas diferenças significativas entre os tratamentos para as variáveis consumo de ração, conversão alimentar e viabilidade econômica. Os resultados de desempenho das aves alimentadas com ração contendo MOS ST ou MOS AT, combinados ou não com o antibiótico, não diferiram dos obtidos nos tratamentos com avilamicina e da ração basal. No período de 1 a 42 dias de idade, a adição de MOS ST, combinado ou não com avilamicina, melhorou o ganho de peso das aves, enquanto o MOS AT afetou de forma negativa o ganho de peso. A conversão alimentar, o consumo de ração e a viabilidade econômica não foram influenciados pelos tratamentos. No entanto, o uso de aditivos em rações para frango de corte melhorou o rendimento de cortes e reduziu a gordura abdominal.This trial was conducted to study the use of mannanoligosaccharide (standard and concentrate) on chicks diets. One thousand and eigthy 1-d male chicks (Ross) averaging 42 g of initial BW were assigned to a completely randomized experiment with nine replications of 20 birds per experimental unit. The following treatments were analyzed: control, antibiotic (avilamicine), mannaoligosaccharide high concentration (MOS AT), mannaoligosaccharide standard (MOS ST), MOS AT + antibiotic, and MOS ST + antibiotic. The birds were reared in wood powder, reused of a lot previously housed. Weight gain, feed intake, feed:gain ratio, viability and prime cuts yield were evaluated. In the period from 1 to 21 days old, no significant differences across the treatments on feed intake, feed:gain ratio, and viability were found. The results of performance of birds fed diet containing MOS ST or MOS AT combined or not with the antibiotic, did not differ form those of treatments with avilamicin and control. In the period from 1 to 42 days old, mannanoligosaccharides standard (MOS ST) combined or not with avilamicin, increased weight gain, whereas the mannaoligosaccharide high concentration (MOS AT) showed did not affect weight gain. Feed:gain ratio, feed intake and viability were not affected by the different treatments, but the additives increased prime cuts yield and it decreased abdominal fat

Growing knowledge: an overview of Seed Plant diversity in Brazil

Abstract An updated inventory of Brazilian seed plants is presented and offers important insights into the country's biodiversity. This work started in 2010, with the publication of the Plants and Fungi Catalogue, and has been updated since by more than 430 specialists working online. Brazil is home to 32,086 native Angiosperms and 23 native Gymnosperms, showing an increase of 3% in its species richness in relation to 2010. The Amazon Rainforest is the richest Brazilian biome for Gymnosperms, while the Atlantic Rainforest is the richest one for Angiosperms. There was a considerable increment in the number of species and endemism rates for biomes, except for the Amazon that showed a decrease of 2.5% of recorded endemics. However, well over half of Brazillian seed plant species (57.4%) is endemic to this territory. The proportion of life-forms varies among different biomes: trees are more expressive in the Amazon and Atlantic Rainforest biomes while herbs predominate in the Pampa, and lianas are more expressive in the Amazon, Atlantic Rainforest, and Pantanal. This compilation serves not only to quantify Brazilian biodiversity, but also to highlight areas where there information is lacking and to provide a framework for the challenge faced in conserving Brazil's unique and diverse flora