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Our hypothesis was that different sources of unsaturated fatty acids from oilseeds (sunflower, soybeans, and cottonseed) could alter milk yield, fatty acid profile, and the amount of unsaturated fatty acids yielded in milk. It aimed to evaluate the effects of lipid sources on yield and composition and fatty acids in milk of primiparous Girolando cows. Five cows in lactation (35 ± 8 days), with 410 ± 7.15 kg BW were randomly distributed in a 5 x 5 Latin square. Five experimental diets, namely a control diet without an additional source of lipid and four diets with different lipid sources: cottonseed, sunflower seed, whole soybean, or soybean oil, as lipid source, to reach 70 g/kg of ethereal extract dry matter basis were used. Cottonseed and soybean oil addition reduced daily yield by 15 and 22%. Oilseed can alter fatty acid profile in milk. Whole soybean provided greater daily milk and fatty acids yields.

Objetivou-se neste estudo avaliar o efeito de dois protocolos de suplementação proteica energética no desempenho e viabilidade econômica de bezerros nelore não castrados ao desmame a terminação a pasto. Foram utilizados 40 bovinos da raça Nelore com 8 meses de idade, peso médio 285,16±22,74 Kg, pertencentes à Fazenda Fronteira município de Porto Murtinho, Mato Grosso do Sul, avaliados entre maio de 2015 e setembro de 2016. Analise de desempenho dos animais apresentou efeito, entre os tratamentos para peso final, o ganho médio total e ganho de peso médio diário. Os bovinos suplementados com Protocolo 2 consumiram maior quantidade de matéria seca (807,57 kg) que os animais do Protocolo 1 (427,03 kg). Com este nível de consumo de matéria seca também houve aumento na quantidade de proteína bruta fornecida para o Protocolo 2 em 320,17 kg. A maior receita total observada foi Protocolo 1 (R$ 2.868,90) este resultado está associado ao peso final superior e ao rendimento de carcaça de 52,6% após o abate, embora o Protocolo 2 tenha apresentada maior rendimento de carcaça (54%). Conclui-se que A suplementação do Protocolo 1 foi mais eficiente para desempenho, no entanto a receita total foi insuficiente para pagar os custos de produção, gerando uma rentabilidade negativa devido ao gasto com suplementação no período experimental.Palavras chaves: bovino de corte, ganho de peso, suplementação a pasto Performance and economic viability of young bulls submitted to different supplementsABSTRACT. The objective of this study was to evaluate the effect of two energy protein supplementation protocols on performance and economic viability of Nellore bulls calves from weaning to pasture finishing. Nellore calves with 8 months of age, mean weight 285.16 ± 22.74 kg, belonging to the Fronteira Farm municipality of Porto Murtinho, Mato Grosso do Sul, were evaluated between May 2015 and September 2016. Analysis, between the treatments for final weight, mean total gain and average daily weight gain. Steers supplemented with Protocol 2 consumed more dry matter (807.57 kg) and Protocol 1 animals (427.03 kg). As this level of dry matter consumption there was also an increase in the amount of crude protein supplied to Protocol 2 in 320.17 kg. The highest total income

Pantaneiro cattle (Bos taurus taurus) is a breed locally adapted to the Brazilian Pantanal. Local breeds are essential for the quality production of organic systems based on planned grazing practices, because of their results in resilient and productive ecosystems, enhancing biodiversity. This study aimed to evaluate the performance of Pantaneira primiparous cows, and systems with reduced use of concentrate, simulating organic production conditions. Five animals, with an average body weight of 396.2 ± 43.5 kg, were kept in individual continuous grazing regimes and supplemented with different concentrate levels (1.2%, 0.9%, 0.6%, 0.3%, and 0.0% of body weight). The animals were allocated at random in a 5 × 5 Latin square design repeated twice during the study time. The cows had a low dry matter and nutrient intake with a reduction in concentrate level, with improvement in neutral detergent fiber digestibility and a reduction in total nutrient digestibility. No changes were observed in plasma glucose levels or urea excretion, but the plasma urea nitrogen decreased with reductions in concentrate levels. There was a reduction in milk yield, but the energy-corrected milk was not affected by the reduction in concentrate levels; furthermore, the milk yield efficiency was not affected. The milk fat content improved with the reduction in concentrate levels. The Pantaneira breed has the genetic potential for the maintenance of competitive production and quality in organic systems.

This research communication describes the influence of diet, mammary quarter position and milking process on the temperature of teats and udder of cows fed diets containing different lipid sources. Five primiparous cows were fed diets containing cottonseed, sunflower seed, soybeans or soybean oil as a source of lipids and a reference diet without the inclusion of lipid sources in a 5 × 5 Latin Square design. Milk yield was determined in the last five days of each period. Milk samples were collected for SCC analysis on the last two days of each experimental period. The images of the mammary gland were obtained using an infrared camera and were analyzed with appropriate computer software. Milk yield was 14.8% higher for cows fed soybeans as a source of lipids. Diets and somatic cell counts did not influence the temperature of teats and udder. The milking process reduced the temperature of teats and udder by 0.79°C. Rear teats and rear quarters had higher surface temperatures than front teats and fore quarters. Changes in temperature of teats and mammary quarters occurred as a function of the milking process and quarter position. However, the diet and the SCC did not influence the temperature of teats and mammary quarters in this experiment.