The objective of this study was to evaluate the effect of different protein sources on the performance of lamb ewes and their offspring supplemented in deferred pasture. The treatments were the different protein sources: soybean meal, cotton cake, babassu cake and coconut cake. The ewes were weighed and evaluated for their body condition score during the gestation, parturition and weaning phases. The lambs were weighed at birth and at weaning. The structural variables and chemical composition of the pasture were evaluated during the usage period. Grass height and forage mass were higher when the ewes were in the gestation and weaning stages. The leaf mass was not altered during the pasture usage with a mean value of 566.1kg ha-1 DM. The highest levels of crude protein in the leaf blade were observed during the parturition and weaning phases. The body weight of the ewes did not differ between the sources with averages 45.0, 39.9 and 36.6kg for the gestation, parturition and weaning phases, respectively. Weights at birth and at weaning had an effect from protein sources, with the highest values observed in the lambs of ewes who received soybean meal and babassu cake supplementation. The lambs of ewes supplemented with soybean had higher average daily gain and total gain. Babassu, coconut and cotton cakes can replace soybean meal in supplementation of ewes in deferred pasture.

IntroduçãoPastos diferidos são caracterizados por conter elevado percentual de material morto e colmo em relação a lâmina foliar, isso ocorre por passar do ponto ideal de pastejo e tem como consequência baixo valor nutritivo do pasto. Aliado a isso durante o período de deferimento ocorre modificações na estrutura do pasto que afeta o comportamento ingestivo do animal, portanto animais mantidos em pastagens diferidas expressam desempenho modesto ou simplesmente mantêm seu peso corporal (SANTOS et al., 2009a), sendo necessário o uso de suplementação para complementar o valor nutritivo da forragem disponível e melhorar a eficiência no uso da forragem, a compreensão desses efeitos do períodos de diferimento sobre a estrutura do pasto e o pastejo pode resultar na geração de recomendações eficientes de manejo dos animais em pastagens diferida.Diante disso objetivou-se avaliar a estrutura do capim-marandu durante o período de diferimento. Fundamentação TeóricaExistem estratégias para disponibilizar forragem suplementar durante o período crítico do ano em recurso forrageiro, como: formação de capineiras de capim ou de cana-de-açúcar, ensilagem, fenação e diferimento do uso da pastagem. Estas estratégias são viáveis tecnicamente, porém o diferimento do uso da pastagem consiste em uma das estratégias de mais fácil adoção e, em geral, de

IntroduçãoO diferimento da pastagem, popularmente conhecido como "vedação da pastagem", consiste em selecionar uma área de pastagem da propriedade e excluí-la do pastejo, geralmente no fim do período chuvoso (SHIO et al., 2011). Dessa maneira, ocorre acúmulo de forragem para ser pastejada durante o período seco e, com isso, é possível minimizar os efeitos negativos da sazonalidade de produção forrageira sobre a produtividade animal (SANTOS et al., 2014) Porém, por passar do ponto ideal de pastejo, os pastos diferidos são caracterizados por conter elevado percentual de material morto e colmo em relação a lâmina foliar, como consequência apresenta em sua massa de forragem elevados teores de fibra, somado aos percentuais baixos de proteína bruta e de digestibilidade da matéria seca, que resultam em baixo valor nutritivo. Com isso entendimento das respostas das espécies forrageiras durante o período de deferimento, a obtenção das características qualitativas do pasto de maneira apropriada é de grande utilidade, contribuindo assim para formar estratégias favoráveis para a exploração adequada do potencial forrageiro.O objetivo deste estudo foi avaliar o valor nutritivo dos constituintes morfológicos do capimmarandu durante o período de deferimento. Fundamentação TeóricaNo Brasil a produção de ruminantes é baseada quase que exclusivamente em pastagens (FONSECA et al., 2011). De modo geral, em virtude do menor custo, a produção em que há predomínio de gramíneas do gênero Brachiaria. Entre os cultivares de Brachiaria brizantha, o

The consumption of bovine milk and its derivatives is associated with inflammation, gastrointestinal disorders and the development of diseases in humans. Most studies related to milk effects are based on either clinal trials or experimental models such as mice and cell cultures. In this study we present the nematode Caenorhabditis elegans as an alternative model to evaluate the effects of milk on oxidative stress in other animal models. The toxicological effect of 20% milk exposure for 8h on C. elegans was evaluated by progeny quantification, body size and pharyngeal pumping rate. Treating the worms with milk did not affect the worms brood size but interfered with their fecundity by delaying the average number of eggs in the first day of oviposition when compared to the control group. The size of worms treated with milk were significantly smaller compared to control. The pharyngeal pumping rate of milk-treated animals was not significantly different compared to untreated animals. Taking together, the results suggest that 20% milk treatment is not toxic for the worms but induces a minor delay achieving its adulthood and therefore its reproduction period. Exposure milk did not reduce the worms’ survival under stress conditions and increase endogenous ROS levels. This study contributes to characterize the effects of milk exposure on the C. elegans nematode.

The aims were to evaluate the effect of breed on the genetic polymorphism kappa-casein, physicochemical composition of milk and Coalho cheese, and on cheese yield; and to evaluate the effect of different periods of storage on sensorial acceptance of the Coalho cheese obtained from milk of Guzerat, Gyr and Sindi cows. Twenty (20) cows of Zebu breeds were selected, from which it was obtained the frequency values of the genetic polymorphism kappa-casein. Milk were submitted to fat, protein, lactose, non-fat solids and total solids, electrical conductivity analysis and somatic cell count. Cheeses were submitted to fat, protein, total solids, pH, moisture and yield (g TS/L) analysis. Attributes appearance, aroma, texture and flavor were judged at the 1st, 25th and 46th day of storage. There was a total frequency of 0.70 for genotype AA, 0.30 for genotype AB. There was no significant difference in milk composition among the studied breeds. However, there were differences in the physicochemical composition (with the exception of the protein) and the yield of the cheeses, but all the breeds showed a similar real yield. It was found effect of the storage period on the cheeses sensory attributes in the different breeds, with the exception of the appearance. The milk of the Guzerat, Gyr and Sindi breeds constitute an excellent raw material for the production of curd cheese and ensures a satisfactory sensorial acceptance of the product at the 1st, 25th and 46th days of storage.