Earl Andreu Acabal

IntroductionRetention of dietary protein to body protein is an inefficient process in pigs. Nitrogen balance studies have shown that nitrogen retention rate (proportion of intake) ranges from 41 - 68% in weaner pigs (Cera et al., 1988), 42 - 56% in grower pigs (Fabian et al., 2004, Otto et al., 2003, Zervas and Zijlstra, 2002), 30 - 46% in finisher pigs (Fabian et al., 2004), and 42 - 52% in sows ...