Intake, nitrogen balance and microbial protein synthesis of steers fed with or without lipid addition

Authors

  • Laila Cecília Ramos Bendia Universidade Estadual do Norte Fluminense Darcy Ribeiro
  • Carlos Augusto de Alencar Fontes Universidade Estadual do Norte Fluminense Darcy Ribeiro
  • Elizabeth Fonsêca Processi Universidade Estadual do Norte Fluminense Darcy Ribeiro
  • Clóvis Carlos Silveira Filho Universidade Estadual do Norte Fluminense Darcy Ribeiro
  • Cláudio Teixeira Lombardi Universidade Estadual do Norte Fluminense Darcy Ribeiro
  • Paulo Roberto Silveira Pimentel Universidade Federal da Bahia
  • Ronaldo Lopes Oliveira Universidade Federal da Bahia
  • Leilson Rocha Bezerra Universidade Federal de Campina Grande
  • Tiago Cunha Rocha Universidade Estadual da Região Tocantina do Maranhão

DOI:

https://doi.org/10.14393/BJ-v36n4a2020-42294

Keywords:

Corn silage, Nitrogen balance, Ruminal ammonia, Soybeans, Soybean oil

Abstract

This study investigated the influence of energy supplementation with or without the addition of lipids on microbial production, microbial synthesis efficiency and nitrogen balance. Eight fistulated steers were used with accessible rumens and kept in individual stalls. Their diets consisted of corn silage; corn silage + concentrate; corn silage + concentrate with addition of lipids in the form of soybean oil; and corn silage + concentrate with addition of lipids in the form of soybean grains. Estimates of microbial protein synthesis were obtained based on the urinary excretion of purine derivatives. The concentrations of ammonia in the rumen were determined immediately at 2, 4, 6 and 8 hours after feeding. The diets with concentrate increased (P<0.05) the microbial protein synthesis and the efficiency of the synthesis and nitrogen balance without a difference between the lipid sources (P>0.05). Concentrated diets presented higher concentrations of urea nitrogen in the serum and urinary urea excretion (P<0.05), but there was no difference between the lipid sources (P>0.05). Energy supplementation, with or without lipid addition, can be used as a strategy to increase the synthesis of the microbial protein in the cattle fed corn silage.

 

Downloads

Download data is not yet available.

Downloads

Published

2020-05-25

How to Cite

BENDIA, L.C.R.., FONTES, C.A. de A.., PROCESSI, E.F.., SILVEIRA FILHO, C.C.., LOMBARDI, C.T.., PIMENTEL, P.R.S.., OLIVEIRA, R.L.., BEZERRA, L.R.. and ROCHA, T.C., 2020. Intake, nitrogen balance and microbial protein synthesis of steers fed with or without lipid addition. Bioscience Journal [online], vol. 36, no. 4, pp. 1306–1314. [Accessed18 May 2022]. DOI 10.14393/BJ-v36n4a2020-42294. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/42294.

Issue

Section

Agricultural Sciences