Intake, digestibility and nitrogen utilization in cattle fed tropical forage and supplemented with protein in the rumen, abomasum, or both
| Autor: | E. D. Batista, Sebastião de Campos Valadares Filho, W. L. S. Reis, Mário Fonseca Paulino, Daiany Iris Gomes, Edenio Detmann, Luana Marta de Almeida Rufino |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Nitrogen balance
animal structures 040301 veterinary sciences Supplementation Casein Forage Biology Biochemistry Abomasum 0403 veterinary science Rumen Animal science Latin square Dry matter Tifton Research 0402 animal and dairy science 04 agricultural and veterinary sciences 040201 dairy & animal science 3-methylhistidine Agronomy Hay Rumen ammonia nitrogen Animal Science and Zoology Food Science Biotechnology |
| Zdroj: | LOCUS Repositório Institucional da UFV Universidade Federal de Viçosa (UFV) instacron:UFV Journal of Animal Science and Biotechnology |
| Popis: | Background There is little information in the tropics with regard the comparative understanding of how an increased nitrogen supply in the rumen or in the intestines affects efficiency of nitrogen utilization in cattle. This study evaluated the effects of supplementation with nitrogenous compounds in the rumen, abomasum, or both on intake, digestibility and the characteristics of nitrogen utilization in cattle fed tropical forage. Four rumen- and abomasum-fistulated Nellore bulls (227 ± 11 kg) were used. Four treatments were evaluated: control, ruminal supplementation (230 g/d of supplemental protein in the rumen), abomasal supplementation (230 g/d of supplemental protein in the abomasum), and ruminal and abomasal supplementation (115 g/d protein in both the rumen and the abomasum). The basal forage diet consisted of Tifton 85 hay with a crude protein (CP) level of 78.4 g/kg dry matter. Casein was used as a supplement. The experiment was conducted using a 4 × 4 Latin square. Results There were no differences between the treatments (P > 0.10) with regard to forage intake. The intake and total digestibility of CP increased (P 0.10). Conclusions The supplementation of cattle fed tropical forage with protein in the rumen, abomasum, or both similarly increased the nitrogen accretion in animal, which reflects improvements on nitrogen status in animal body. |
| Databáze: | OpenAIRE |
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