Preservation of sugarcane silage with urea and calcium oxide: performance and metabolic efficiency of dairy cows

Authors

  • Susi C. S. G. Martins Federal Institute of Education, Science and Technology of Northern Minas Gerais
  • Gleidson G. P. Carvalho Federal University of Bahia
  • Aureliano J. V. Pires State University of Southwest Bahia
  • Laudí C. Leite Federal University of Reconcavo da Bahia
  • Daiane Lago-Novais Federal University of Bahia
  • Ronaldo L. Oliveira Federal University of Bahia
  • Luis G. A. Cirne Federal University of Western Pará
  • Bruna M. A. Carvalho Federal University of Minas Gerais

DOI:

https://doi.org/10.17533/udea.rccp.v34n4a07

Keywords:

digestibility, ensiling, ensilage, feed additives, intake, metabolic efficiency, microbial purines, milk urea nitrogen, nitrogen balance, performance, silage, urea, dairy cows

Abstract

Background: Inclusion of urea and calcium oxide (CaO) during sugarcane ensilage has been hypothesized to improve dairy cow performance. Objective: To evaluate the use of urea and calcium oxide as additives to preserve sugarcane silage quality and determine whether they improve dairy cow performance and metabolic efficiency. Methods: Four diets were used: sugarcane silage without additive (SS), sugarcane silage with 10 g/kg urea (SU), sugarcane silage with 5 g/kg urea + 5 g/kg CaO (SUC), and sugarcane silage with 10 g/kg CaO (SC). Eight crossbred cows at approximately 100 days of lactation were distributed in two 4x4 Latin squares, and their diets were formulated to reach an average milk production of 15 kg/day. Results: Dry matter, non-fibrous carbohydrates, organic matter, total carbohydrates, and total digestible nutrient intake were the highest (p<0.05) for the cows fed SC. Urinary excretion of nitrogen was higher (p<0.05) for cows fed diets based on SUC than those fed diets with SC. Milk urea nitrogen content was the highest (p<0.05) in animals fed SU diets. Nitrogen balance was positive in all treatments; however, the microbial protein synthesis was low for all diets. Conclusions: The diet with SU showed the highest nitrogen loss through the milk. Among the evaluated silages, those with SC and SUC are recommended to promote a high intake of nutritional components.

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Author Biographies

Gleidson G. P. Carvalho, Federal University of Bahia

https://orcid.org/0000-0002-4108-6782
Department of Zootechnics, Federal University of Bahia, Salvador, Bahia, Brazil.

Aureliano J. V. Pires, State University of Southwest Bahia

https://orcid.org/0000-0002-4015-3445
Department of Zootechnics, State University of Southwest Bahia, Itapetinga, Bahia, Brazil.

Laudí C. Leite, Federal University of Reconcavo da Bahia

https://orcid.org/0000-0002-7781-1819
Department of Zootechnics, Federal University of Recôncavo da Bahia, Cruz das Almas, Bahia, Brazil..

Daiane Lago-Novais, Federal University of Bahia

https://orcid.org/0000-0002-6887-8528
Department of Zootechnics, Federal University of Bahia, Salvador, Bahia, Brazil.

Ronaldo L. Oliveira, Federal University of Bahia

https://orcid.org/0000-0001-5887-4753
Department of Zootechnics, Federal University of Bahia, Salvador, Bahia, Brazil.

Luis G. A. Cirne, Federal University of Western Pará

https://orcid.org/0000-0002-8792-1587
Department of Zootechnics, Federal University of Western Pará, Santarém, Pará, Brazil.

Bruna M. A. Carvalho, Federal University of Minas Gerais

https://orcid.org/0000-0001-8980-8599
Institute of Agrarian Sciences, Federal University of Minas Gerais, Montes Claros, Minas Gerais, Brazil.

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Published

2021-06-21

How to Cite

Martins, S. C. S. G., Carvalho, G. G. P., Pires, A. J. V., Leite, L. C., Lago-Novais, D., Oliveira, R. L., Cirne, L. G. A., & Carvalho, B. M. A. (2021). Preservation of sugarcane silage with urea and calcium oxide: performance and metabolic efficiency of dairy cows . Revista Colombiana De Ciencias Pecuarias, 34(4), 305–315. https://doi.org/10.17533/udea.rccp.v34n4a07

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Original research articles