We studied the effect of five bedding materials (wood shavings, sawdust, peanut hulls, wheat straw, and shredded paper) and PLT (a commercial formulation of sodium bisulfate) in factorial combinations, on NH₃ emissions from broiler manure.  Treatments were incubated for 11 days at 25^oC and 98% relative humidity. Ammonia was trapped in 0.1N H₂SO₄ and measured colorimetrically as NH₄⁺-N, and CO₂ was monitored with an infrared analyzer. Ammonia and CO₂ emissions were suppressed by sodium bisulfate throughout the study. Wheat straw, wood shavings, and sawdust, with C (total) / N (total) > 50 or C (biodegradable) / N >20, had low NH₃ emissions. Total NH₃ emissions from peanut hulls and shredded paper were the highest, probably due to peanut hulls’ low C/N ratio and shredded paper’s alkaline pH. No significant interactions on NH₃ emissions were detected between acidifying amendments and bedding materials.