THE ROLE OF FEED PROTEIN-QUALITY IN REDUCING ENVIRONMENTAL-POLLUTION BY LOWERING NITROGEN-EXCRETION .1. SURVEY OF PRINCIPLES IN PROTEIN EVALUATION FOR MONOGASTRICS - A REVIEW

Environmental pollution by faecal nitrogen excretion motivates a renew ed interest in optimising protein utilization of growing-finishing pig s in intensive pig production areas. The importance of digestibility o f proteins, availability of amino acids, and the extent of protein ret ention is emphasized for reducing nitrogen excretion. The principles o f various chemical, microbiological, biochemical and biological method s in feed protein quality evaluation offering a better adjustment of p rotein supply to the requirements of the animal are surveyed.