Effect of Several Known Dietary Manipulations Used In Combination on Nutrient Concentration and Ammonia Emission of Stored Manure

Purdue University 2002 Swine Research Report. As swine operations have grown larger and become concentrated in smaller land areas, handling of swine waste and controlling odor emissions are a top priority. Many dietary manipulations have been well documented as effective in reducing nutrient excretion and concentrations in stored manure. In a previous trial at Purdue, cellulose addition to a reduced CP amino acid supplemented diet reduced slurry pH, ammonium nitrogen, total nitrogen, and volatile fatty acid concentrations in stored manure compared to a standard corn-soy diet (Hankins et al., 2000). Kendall et al. (2000) reported reduced aerial ammonia concentrations when growing pigs were fed a reduced CP high-available phosphorus (HAP) corn diet supplemented with synthetic amino acids, 5% soybean hulls, 0.05% phytase, and reduced mineral sulfates. The objective of this trial was to determine nutrient concentration and ammonia production in stored manure from pigs fed a standard corn-soy diet, a reduced CP amino acid supplemented diet or a diet similar to that fed by Kendall et al. (2000) previously.