Performance and rumen development of dairy calves in early weaning system receiving humic substances in starter concentrate - doi: 10.4025/actascianimsci.v33i4.10907
DOI:
https://doi.org/10.4025/actascianimsci.v33i4.10907Keywords:
fulvic acid, humic acid, fecal score, ruminal papillaeAbstract
The objective of this work was to evaluate the inclusion of humic substances in starter concentrate on the performance of dairy calves and rumen development. Twenty Holstein calves were used in a completely randomized block design and distributed in two treatments according to inclusion of humic substances in concentrate: 1) Control; 2) Humic substances. Animals received 4 L d-1 liquid diet and starter concentrate ad libitum. Fecal score analyses were carried out daily, and calves were weighed weekly and growth measurements and blood samples for glucose, urea-N and β-hidroxibutyrate (BHBA) were taken. The calves were weaned at eight weeks of age and slaughtered for evaluation of forestomach development. There were no effects (p > 0.05) between treatments or treatment x age interaction for concentrate intake, weight gain, growth measurements or blood parameters. Fecal scores and rumen development were not affected (p > 0.05) by the inclusion of humic substances. There were no benefits from the inclusion of humic substances in starter concentrate on performance or rumen development of dairy calvesDownloads
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Published
2011-04-28
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Section
Animal Production
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How to Cite
Silva, J. T. da, Bittar, C. M. M., & Ferreira, L. S. (2011). Performance and rumen development of dairy calves in early weaning system receiving humic substances in starter concentrate - doi: 10.4025/actascianimsci.v33i4.10907. Acta Scientiarum. Animal Sciences, 33(4), 395-401. https://doi.org/10.4025/actascianimsci.v33i4.10907
