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Effect of Season on Mineral Concentrations of Braquiaria (Brachiaria Brizantha cv. Marandu) in Dairy Cattle Farms of Eastern Amazon I. Macrominerals

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Author(s): Rosana Quaresma Maneschy | Elyzabeth de Cruz Cardoso | Jonas Bastos da Veiga | Lee R. McDowell

Journal: Journal of Animal and Veterinary Advances
ISSN 1680-5593

Volume: 4;
Issue: 1;
Start page: 118;
Date: 2005;
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ABSTRACT
This study evaluated the seasonal effects of macromineral concentrations in Brachiaria brizantha cv. Marandu pastures on small- and medium-sized farms in the micro regions of Castanhal and the Municipality of Uruara, State of Par?, Brazil. Forage was collected at the end of the dry (November, 1998) and the rainy seasons (June, 1999), to determine calcium (Ca), phosphorus (P), magnesium (Mg), sodium (Na) and potassium (K) concentrations. A complete randomized design was used, considering the main location as the major factor and the season as sub-plot. At both major locations, Brachiaria brizantha cv. Marandu did not meet the P and Na requirements for dairy cows during lactation, suggesting the need for supplementation of these minerals.
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