Efficiency of Amino Acid Utilization in Nellore Cattle Grazing Low-Quality Forage Supplemented with Different Sources of Nitrogen

Author(s)

Dias, Ana Veronica Lino ; Messana, Juliana Duarte ; Granja-Salcedo, Yury Tatiana ; Alfonso, Yeison Fabian Murilo ; Silva, Lorrayny Galoro ; Camargo, Karine Dalla Vecchia ; Alves, Kenia Larissa Gomes Carvalho ; Goncalves, Paloma Helena ; Reis, Ricardo Andrade ; Berchielli, Telma Teresinha

• Document type: Journal article
• Source: LIFE-BASEL; v. 13, n. 8, p. 15-pg., 2023-08-01.

Abstract

This study aimed to evaluate the effects of supplementation with non-protein nitrogen (NPN) or ruminal undegradable protein (RUP) on intake, digestibility, and amino acid (AA) use efficiency of Nellore cattle grazing during the dry season. Eight Nellore steers (12 +/- 2 months old) were used in quadruplicate Latin squares (2 Chi 2). The animals were placed on Urochloa brizantha cv. Xaraes under continuous grazing. The treatments included the following: (1) urea supplementation (NPN) and (2) supplementation of corn gluten meal 60 (CGM, RUP). Animals supplemented with CGM showed higher intakes of dry matter (DM) supplement, total AA, essential AA, and individual AA. The supplementation did not affect the total AA digestibility, total AA flux, and the AA fluxes of microbial origin and RUP from the diet (p > 0.05). The ruminal microorganism origin flux of total AA to the duodenum was 44.5% and 52.7% for animals supplemented with NPN and CGM, respectively. Animals supplemented with CGM showed an increase in blood concentrations of isoleucine (+19.09 mu mol/L), cystine (+27.29 mu mol/L), and albumin (+0.11 g/dL) (p < 0.05), but this increase was not accompanied by an improvement in N use efficiency of steers (p > 0.05). RUP supplementation via CGM can be an efficient nutritional strategy to enhance the intake and absorption of AA by Nellore cattle grazing low-quality forage during the dry season. (AU)

• FAPESP's process: 18/06836-7 - Influence of rumen non-degradable protein supplementation on intake, metabolism and performance in Nelore cattle grazing on pasture
• Grantee: Karine Dalla Vecchia Camargo
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 19/21280-8 - Influence of rumen undegraded protein supplementation on intake, metabolism and ruminal microbiota of Nellore cattle grazing in the dry season
• Grantee: Ana Veronica Lino Dias
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 16/22022-4 - Impact of metabolizable protein in the production of beef cattle and emission of greenhouse gases
• Grantee: Telma Teresinha Berchielli
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 19/12740-5 - Metabolizable protein effects on the acute-phase inflammatory response following environmental and dietary changes of finishing beef cattle
• Grantee: Lorrayny Galoro da Silva
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 15/01147-0 - EFFECT OF NUTRITIONAL PLANS IN STOCKER GRAZING ON GROWTH PHYSIOLOGY, METABOLIC PARAMETERS AND MEAT QUALITY OF YOUNG BULLS FROM DIFFERENT GENETIC TYPES FINISHED IN PASTURE OR FEEDLOT
• Grantee: Telma Teresinha Berchielli
• Support Opportunities: Regular Research Grants
• FAPESP's process: 17/02034-0 - Degradation and in situ ruminal microbial dynamics of different sources of protein for beef cattle
• Grantee: Yury Tatiana Granja Salcedo
• Support Opportunities: Scholarships in Brazil - Post-Doctoral