Fig. 1From: Does intra-ruminal nitrogen recycling waste valuable resources? A review of major players and their manipulationSimplified scheme of intestinal N metabolism and the target sites of manipulation strategies for reducing ruminal NC degradation that have shown effectiveness in vivo or in vitro (according to [6, 22, 86, 87, 102, 138, 151, 155, 156, 160, 166, 168, 202, 208, 218]). 1This NC can also be supplied with the feed; 2Urea is partly excreted with urineBack to article page