consumo e digestibilidade de novilhos nelore sob pastagem suplementados com misturas múltiplas intake and digestibility of nelore steers grazing pasture and supplemented with multiple mixture
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2004
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Abstract
Estudou-se o efeito da suplementação com misturas múltiplas sobre o consumo, digestibilidade e desempenho de novilhos Nelore, em pastagens de Brachiaria brizantha Cv. Marandu, submetidos a quatro tratamentos. No tratamento um (T1), cada animal recebeu 800g/dia de suplemento contendo uréia como fonte de nitrogênio não protéico (NNP); no tratamento dois (T2), recebeu 800g/dia de mistura na qual a uréia foi substituída por amiréia como fonte de NNP; no tratamento três (T3), recebeu 1500g/dia de uma mistura com amiréia; e no tratamento quatro (T4= controle), recebeu sal mineral. Seis animais por tratamento foram utilizados para se medir o consumo pela técnica de indicador externo (óxido crômico), e 10 animais foram usados na avaliação de ganho de peso. Foram utilizados dois animais canulados no esôfago para coleta de amostra de extrusa. Os animais suplementados obtiveram ganhos de peso superiores (P<0,05) aos do tratamento-controle, 435, 419, 467 e 271 g/dia para os tratamentos T1, T2, T3 e T4, respectivamente. Os coeficientes de digestibilidade da matéria seca (MS) foram de 56,7, 49,8, 48,9 e 45,5% para os tratamentos T1, T2, T3 e T4, respectivamente, sendo correlacionados positivamente com a digestibilidade in vitro da MS (P<0,05). A suplementação com misturas múltiplas promoveu aumento no consumo (P<0,05).
The effect of three multiple mixtures supplementation on intake, digestibility and performance of Nelore steers grazing pasture of Brachiaria decumbens CV Marandu was studied. The multiple mixtures (treatments - T) were defined as: T1 - 800g of supplement with urea as crude protein source, T2 - 800g of mixture in which urea was replaced by starea, T3 - 1500g of starea, and T4 - mineral salt fed ad libitum as a control group. Six animals per treatment were given chromic oxide as a marker to measure intake and 10 animals per treatment were used to evaluate their performance. Two esophageal fistulated steers were used to collect samples of extruse. The animals fed on supplement diets showed higher weight gains (335, 419, 467g/animal) than those from the control group (271g/animal). Dry matter digestibility were 56.7, 49.8, 48.9 and 45.5%, respectively, for T1, T2, T3 and T4. A positive correlation between dry matter digestibility and in vitro dry matter digestibility (P<0.05) was observed. Supplementation with multiple mixtures increased dry matter intake (P<0.05).
The effect of three multiple mixtures supplementation on intake, digestibility and performance of Nelore steers grazing pasture of Brachiaria decumbens CV Marandu was studied. The multiple mixtures (treatments - T) were defined as: T1 - 800g of supplement with urea as crude protein source, T2 - 800g of mixture in which urea was replaced by starea, T3 - 1500g of starea, and T4 - mineral salt fed ad libitum as a control group. Six animals per treatment were given chromic oxide as a marker to measure intake and 10 animals per treatment were used to evaluate their performance. Two esophageal fistulated steers were used to collect samples of extruse. The animals fed on supplement diets showed higher weight gains (335, 419, 467g/animal) than those from the control group (271g/animal). Dry matter digestibility were 56.7, 49.8, 48.9 and 45.5%, respectively, for T1, T2, T3 and T4. A positive correlation between dry matter digestibility and in vitro dry matter digestibility (P<0.05) was observed. Supplementation with multiple mixtures increased dry matter intake (P<0.05).
| Reference Key |
oliveira2004arquivoconsumo
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|---|---|
| Authors | ;L.O.F. Oliveira;E.O.S. Saliba;N.M. Rodriguez;L.C. Gonçalves;I. Borges;T.B. Amaral |
| Journal | Environmental research |
| Year | 2004 |
| DOI |
10.1590/S0102-09352004000100010
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