Selected ruminal variables and purine urinary excretion rate of steers subjected to feeding, fasting, and re-feeding conditions

• Autorzy: Ortolani E.L. , Maruta C.A. , Barreto Junior R.A. , Mori C.S. , Antonelli A.C. , Sucupira M.C.A. , Minervino A.H.H.
• Języki publikacji: EN

Abstrakty

EN

The effects of feeding, fasting, and re-feeding on the ruminal profile of growing cattle were studied. Ruminal fluid and urine samples were obtained from 12 crossbred steers weighing approximately 300 kg during the following periods: 11 h of normal feeding (postprandial period), 48 consecutive hours of fasting, and followed by 48 h of re-feeding. Fasting promotes changes in the ruminal profile, such as an increase in ruminal pH, reduction in the number of rumen protozoa and bacteria, and decrease in the urinary excretion of allantoin; however, it does not change the urinary uric acid excretion rate. The overall mean ruminal pH was higher during fasting (7.53±0.27) in comparison to those at normal feeding (6.72±0.25) and re-feeding (6.62±0.31) (p<0.05). During re-feeding, the ruminal profile returned to normal, except for the protozoa count, which despite a slight increase only after 48 h of re-feeding, did not recover to baseline values.

• Wydawca: -
• Czasopismo: Polish Journal of Veterinary Sciences
• Rocznik: 2022
• Tom: 25
• Numer: 1
• Opis fizyczny: p.175-182,ref.

Twórcy

autor

Ortolani E.L.

• Department of Clinical Science, School of Veterinary Medicine and Animal Science, University of Sao Paulo, São Paulo-SP, 05508-270, Brazil

autor

Maruta C.A.

• Department of Clinical Science, School of Veterinary Medicine and Animal Science, University of Sao Paulo, São Paulo-SP, 05508-270, Brazil

autor

Barreto Junior R.A.

• Department of Animal Science, Federal University of Semiarid, 59625-900, Mossoró-RN, Brazil

autor

Mori C.S.

• Department of Clinical Science, School of Veterinary Medicine and Animal Science, University of Sao Paulo, São Paulo-SP, 05508-270, Brazil

autor

Antonelli A.C.

• School of Veterinary Medicine, Federal University of Sao Francisco Valley, 56304-205, Petrolina-PE, Brazil

autor

Sucupira M.C.A.

• Department of Clinical Science, School of Veterinary Medicine and Animal Science, University of Sao Paulo, São Paulo-SP, 05508-270, Brazil

autor

Minervino A.H.H.

• Laboratory of Animal Health, LARSANA, Federal University of Western Pará, UFOPA, 68040-255 Santarém-PA, Brazil

Identyfikatory

DOI

10.24425/pjvs.2022.140854