TY - JOUR JO - Journal of Animal and Feed Sciences J2 - J. Anim. Feed Sci. SN - 1230-1388 VL - 4 IS - 3 PY - 1995 ID - Schadereit1995 TI - Intestinal nitrogen flow, total nitrogen and 15N balance in pigs labelled intravenously with 15N-leucine and fed a meat meal diet AB - Three pigs of about 33 kg body weight, each fitted with re-entrant cannulas into the duodenum and ileum and with bladder catheters were used for the study. One of the pigs was infused intravenously with 15 N-leucine for 8 days. Total N passage, 15 N nitrogen passage through the duodenum and ileum, and N balance were determined. The mean amount of total N passing the duodenum exceeded the ingested N by 12%, and that passing the ileum accounted for 27% of N intake. Of the infused 15 N, 67.4% was found in the urine, faeces, digesta and carcass after slaughter. Taking the recovered amount of 15 N as 100%, 20.4% was found in urine, 0.6% in faeces, 8.2% in digesta and 70.8% in tissues. It was concluded that 15 N retention from intravenously administrated leucine was much higher than from 15 N in urea given with feed, as estimated previously. AU - Schadereit, R. AU - Krawielitzki, K. AU - Żebrowska, T. AU - Kowalczyk, J. AU - Kreienbring, F. SP - 207 EP - 215 DA - 1995 DO - 10.22358/jafs/69794/1995 UR - https://doi.org/10.22358/jafs/69794/1995 ER -