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Effects of organic selenium in the diet of dairy cows on the level of heat stress, production, mastitis occurrence and physiological parameters


The productivity desired by farmers and technicians through certain management techniques, may eventually cause the animal some discomfort, compromising their performance and health. Thus, it's good to be attentive to the stressor agent for the production environment to be optimized. However, besides the environment, providing a balanced diet is essential to the animals, since many studies have suggested that the provision of micronutrients, including organic selenium, may improve, among other factors, production and milk quality. This research will be developed at the Center for Research and Technological Analysis of Agribusiness - Bovine Milk - the Institute of Animal Science, New Odessa / SP, in the period from September to December 2009, and as a goal, it has to evaluate the effects of adding organic selenium in the diet of lactating cows, as well as possible increasing in production and milk quality, content of selenium in milk and the occurrence of mastitis in hot weather. Besides that, it will be analyzed the intake of dry matter by animals and their correlations with environmental variables and physiological. (AU)

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