Reduction of ammonia emission from slurry by feeding a lowering protein diet supplemented with high non-starch polysaccharide in the growing pigs

Abstract

Nutritional management can substantially contribute to a reduction in urinary nitrogen excretion and ammonia emission from pig slurry. It is generally agreed that feeding low crude protein diets supplemented with synthetic amino acid lowers or high non-starch polysaccharide (NSP) diet lower urea excretion by pigs, resulting in lower ammonia emission. The manipulation of the pigs’ feeding may be considered as the first intervention in this chain : ”reduction of ammonia emission from pig production systems starts from the pigs by means of nutrition”. The experiments described in this paper tested the most effectiveness of the combination of low crude protein diet and high NSP feedstuffs to reduce ammonia emission from pig slurry by alternating dietary composition.