Balance de nitrógeno en dietas de cuyes (cavia porcellus) con la inclusión de diferentes niveles de maralfalfa (pennisetum spp)

The lack of raw materials for the elaboration of balanced diets and the necessity to obtain good product performance, resulting from efficient nutrient utilization, comprise a real challenge for animal nutrition. The objective of this study was to evaluate the effect of implementing different maralfalfa levels in the guinea pig diet on nitrogen balance. Diets were isoenergetics (2800 kcal/kg) and isoproteins (18%) which contained 0, 2, 16 and 32% of maralfalfa, with fiber levels of 13, 14, 18 and 21% respectively; were supplied ad libitum. Feces and urine were collected for 4 days and the following variables were studied: amount of nitrogen (N) ingested, urinary N, fecal N, N retention, N retention rate, N digestibility and N retention rate based on N digested. Males showed higher food and nitrogen consumption than females (p<0,001). The most highest levels of maralfalfa, 16% and 23%, increased fecal nitrogen excretion (p=0.017). On the other hand, males excreted more fecal N compared to females (p<0,001). The males showed higher N retention than the females (p<0.001). N digestibility was lower with 16 and 32% maralfalfa (p<0.001), in this same context, females had better N digestibility than males (p<0.001). It is concluded that the inclusion of maralfalfa did not affect N retention, however, high levels (16 and 32%) of maralfalfa cause lower N digestibility due to greater fecal N excretion. Keywords: guinea pigs, crude fiber, intake N, fecal N, urinary N, nitrogen balance.

• Prif Awdur: Ganazhapa Palta, Yordy Pabel (author)
• Fformat: bachelorThesis
• Iaith: spa
• Cyhoeddwyd: 2023
• Pynciau: CUY; COBAYOS; NITROGENO
• Mynediad Ar-lein: https://dspace.unl.edu.ec/jspui/handle/123456789/26507