Avaliação do fosfato de rocha com baixo teor de flúor na alimentação de eqüinos em crescimento Evaluation of rock phosphate with low fluorine level in diets for growing horses

• Main Authors: Mauro Dal Secco de Oliveira, Carlos Eduardo Furtado, Daniela Vivacqua Mendes Viana, Hugo Tosi, Alexandre Amstalden Moraes Sampaio
• Format: Article
• Language: English
• Published: Editora da Universidade Estadual de Maringá (Eduem) 1999-11-01
• Series: Acta Scientiarum: Animal Sciences
• Subjects: potras; crescimento; fosfato de rocha; fósforo
• Online Access: http://www.periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/4336

Utilizaram-se 18 potras com idade média de 11 meses e peso vivo médio de 250 kg, alimentadas com 3 dietas contendo fosfato bicálcico (FB); 50% de fosfato bicálcico mais 50% fosfato de rocha de Tapira (BT) e fosfato de rocha de Tapira (FT), incorporados ao concentrado (1,5% do peso vivo/animal/dia) e ao sal mineralizado (50 g/animal/dia). O nível médio de flúor nas dietas FB, BT e FT foi, respectivamente, de 53,0; 90,0 e 184,0 ppm. O consumo diferenciado de fluoreto nas diferentes dietas não acarretou efeitos sobre os parâmetros ganho de peso, perímetro torácico, perímetro do joelho e perímetro da canela. Os animais que receberam a dieta contendo exclusivamente fosfato de rocha apresentaram menor aumento de altura na cernelha (1,27cm) quando comparados àqueles que receberam dietas contendo fosfato bicálcico (1,55 e 1,30cm).<br>Eighteen fillies of <em>Brasileiro de Hipismo</em> breed with initial age between 9 and 12 months and 250kg of average weight were used in a complete block design, during a five-month trial to evaluate the use of three different inorganic phosphorus sources. The sources were dicalcium phosphate (FB), half and half dicalcium phosphate/Tapira rock phosphate mixture (BT) and Tapira rock phosphate (FT). They were added to a basal concentrate, given at the rate of 1.5% of average body weight and to a mineralized salt, of which 50 g/animal was offered daily. The mean fluoride level (concentrate plus salt) in diets FB, BT and FT was 53, 90 and 184 ppm respectively. The mean monthly withers height gain was 1.55 (FB), 1.30 (BT) and 1.27cm (FT) and there was a significant difference between FB and FT diets.