ENADE Zootecnia Practice Questions - ENADE Zootecnia - Exame Nacional De Desempenho Dos Estudantes Exam

RUP is completely broken down into ammonia by protozoa in the rumen, while RDP bypasses ruminal fermentation without contributing peptides or amino acids to the microbial pool for abomasal flow in lactating dairy cattle receiving corn silage rations. Microbial crude protein synthesis is maximized when high levels of dietary urea are fed without any available fermentable carbohydrates or sulfur sources in the anaerobic rumen environment of grazing beef steers on native dry tropical rangelands. RDP is hydrolyzed by ruminal microbes into peptides, amino acids, and ammonia (NH3), which are used together with fermentable organic matter to synthesize microbial true protein possessing high biological value for intestinal absorption. Excess ruminal ammonia is directly converted into essential amino acids by abomasal parietal cells, preventing hepatic urea synthesis and urinary nitrogen excretion in lactating dairy cattle managed under intensive commercial confinement systems.