Comparison of biochar and Poultry Litter Treatment (PLT) amendments on broiler litter quality and bird performance

Broiler litter management is critical for overall bird health and performance. Poor litter conditions can result in increased ammonia (NH 3 ) volatilization and moisture, which negatively impact bird productivity and welfare. Poultry Litter Treatment® (PLT) is a litter amendment that has been applied to reduce ammonia (NH 3 ) volatilization; however, PLT does not address litter moisture content (MC). Biochar (BC) is a porous material with a high surface area that may absorb moisture and mitigate NH 3 volatilization. The objectives of this study were to evaluate the effects of BC and PLT on MC, NH 3 volatilization, and broiler performance during a 42-day flock grow-out. Birds were reared in 1.52 m x 2.74 m pens containing used litter, feeders, and a drinker line. Water activity, pH, and nutrient content were also evaluated. PLT and BC were surface applied at 0.73 kg∙m -2 and 30 % (vol/vol). A control of non-amended litter was included. Litter samples were collected at d 0, 17, 29, and 41. NH 3 was measured on d 0, 14, 28, and 41. Litter treatment and grow-out time significantly impacted NH 3 volatilization and MC. Overall, PLT had the lowest NH 3 concentrations. On d 41, BC had the highest NH 3 (104 ppm). BC-treated litter had the lowest MC and highest NH 3 , while PLT-treated litter was lowest in NH 3 volatilization. Litter treatment had no effect on bird performance, indicating these amendments did not negatively affect bird performance. BC may promote lower MC; however, further research is needed to understand its effects on NH 3 volatilization.