The Effect of Paylean and Dietary Crude Protein Level on Odor Production and Nutrient Concentration in Anaerobically Stored Pig Manure

Purdue University 2001 Swine Research Report. The pressure on swine producers to produce more environmentally friendly pork has increased in recent years as swine production units have become larger. Large pork production units have the potential to concentrate large volumes of manure in small land areas. Decreased land area for manure application contributes to nutrient build up in soil, which can lead to contaminating waterways from runoff and leaching into ground or surface waters. Odors from pork production units have threatened their existence in some areas and have often led to nuisance lawsuits against production units. The majority of odors from swine units are created from the anaerobic degradation of excreted nitrogenous, sulfur and carbohydrate compounds in manure. Paylean (ractopamine hydrochloride) has been shown to enhance nitrogen utilization for lean growth in finishing pigs, but the effect of Paylean on nitrogen and phosphorus excretion and odorous compound production in stored manure is unknown. The objective of this study was to determine the production of odorous compounds and the concentration of nutrients in stored manure from pigs fed a Paylean diet at two levels of crude protein (CP) during the late finishing period.