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Arq. bras. med. vet. zootec. (Online) ; 74(6): 1101-1110, 2022. ilus, tab, graf
Article in English | VETINDEX | ID: biblio-1416286

ABSTRACT

The aim of this case study was to evaluate the clinical and productive data of Nellore cows during pregnancy and lactation, supplemented or not with P. Ninety-five pregnant heifers were divided into two groups (G40 and G0). Until the date of calving animals from G40 received a mineral mixture composed of 224g of Na and 40g of P/kg, and G0 received only NaCl. After calving heifers were divided into four treatments: from G40, 28 first-calf cows continued to receive the mineral mixture containing 224g of Na and 40g of P/kg (group 40/40) and 12 started to receive only NaCl (group 40/0); from G0, 26 continued to receive only NaCl (group 0/0) and 15 started to receive a mixture containing 224g of Na and 40g of P/kg (group 0/40). In the second experimental phase, 205 multiparous cows were divided into two groups: G1 (40/40) consisting of 40 cows, receiving a mineral mixture containing 244g of Na and 40g/P per kg, during pregnancy and lactation, and group 2 (0/0) formed by 165 cows, which were supplemented only with NaCl. In both experiments, whether in pregnant or lactating breeders, there was not any sign of P deficiency or differences in calves LW at 120 and 210 days.


Este estudo avaliou os aspectos clínicos e produtivos de matrizes Nelore, suplementadas ou não com P. Noventa, e cinco nulíparas prenhes foram distribuídas em dois grupos (G40 e G0). Os animais do G40 receberam uma mistura mineral com 224g de Na e 40g de P/kg, até a data do parto, e o G0 recebeu apenas NaCl. Após o parto, as primíparas foram divididas em quatro grupos: do G40, 28 continuaram a receber mistura contendo 224g de Na e 40g de P/kg (grupo 40/40), e 12 passaram a receber apenas NaCl (grupo 40/0); do G0 26 continuaram recebendo apenas NaCl (grupo 0/0), e 15 passaram a ser suplementadas com a mistura contendo 224g de Na e 40g de P/kg (grupo 0/40). Na segunda fase experimental, 205 vacas foram divididas em dois grupos: G1 (40/40), composto por 40 vacas, suplementadas com a mistura mineral contendo 244g de Na e 40g de P/kg, durante a gestação e a lactação, e o G2 (0/0) foi formado por 165 vacas, as quais foram suplementadas apenas com NaCl, durante a gestação e a lactação. Em ambos os experimentos, seja nas matrizes em gestação ou naquelas em lactação, não houve qualquer sinal da deficiência de P, e isso se refletiu na ausência de diferenças nos pesos dos bezerros aos 120 e 210 dias.


Subject(s)
Animals , Female , Pregnancy , Cattle , Birth Weight , Phosphorus, Dietary/administration & dosage , Phosphorus, Dietary/analysis
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