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- Title
INTAKE, NITROGEN BALANCE AND MICROBIAL PROTEIN SYNTHESIS OF STEERS FED WITH OR WITHOUT LIPID ADDITION.
- Authors
BENDIA, Laila Cecília Ramos; FONTES, Carlos Augusto de Alencar; PROCESSI, Elizabeth Fonsêca; SILVEIRA FILHO, Clóvis Carlos; LOMBARDI, Cláudio Teixeira; PIMENTEL, Paulo Roberto Silveira; OLIVEIRA, Ronaldo Lopes; BEZERRA, Leilson Rocha; ROCHA, Tiago Cunha
- 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.
- Subjects
MICROBIOLOGICAL synthesis; BEEF cattle; LIPIDS in nutrition; NITROGEN in animal nutrition; DIETARY supplements
- Publication
Bioscience Journal, 2020, Vol 36, Issue 4, p1306
- ISSN
1516-3725
- Publication type
Article
- DOI
10.14393/BJ-v36n4a2020-42294