In these experiments the soil was saturated with water and partly frozen, and the infiltration of slurry into the soil reduced. The accumulated loss over 6 days was high, however, because the rate of loss was constant throughout the period. When temperatures were near zero, the rate of ammonia loss was generally low. During October 1986 to November 1989 42 treatments were examined, using slurries taken from the same slurry tank to provide slurries of similar chemical composition.
#Ph of dilute ammonia solution series#
This report considers the effect of wind speed, temperature and water vapour deficit on the ammonia loss over a series of 6-day periods. The experiments were carried out on a sandy soil with seven different surface covers. Determination of dissociation constant and Henry’s constant for broiler litter will allow more accurate simulation of litter nitrogen dynamics.Īmmonia losses from surface-applied cattle slurry were measured under field conditions using a wind tunnel system that allows variables affecting ammonia loss to be examined under controlled conditions. Henry’s Law constant (0.0158 atm/M) in litter slurry was similar to Kh (0.0164 atm/M) in aqueous solution. Dissociation constant in litter slurry was 1.02, 20% of the dissociation constant in aqueous solution, which may be due to the ammonia/um adsorption and reduced activity coefficient. The research qualified Kd and Kh in broiler litter in replicated lab experiments. Values of Kd and Kh developed for aqueous solutions are not appropriate for modeling the fate of NH4+ and NH3 in litter system.
#Ph of dilute ammonia solution free#
Similarly, Henry’s law constant (Kh) which describes the equilibrium of NH3 between the liquid and gas phases in aqueous solution with free liquid surface may not apply to broiler litter.
The dissociation constant (Kd) that controls NH4+- NH3 equilibrium developed for aqueous solutions may not apply to broiler litter which has much higher ionic concentration. In poultry litter, uric acid and urea hydrolyze to ammonium (NH4+) and a fraction of NH4+ coverts to NH3 the NH4+- NH3 equilibrium in the litter depends on pH, temperature, moisture content, ionic concentration, carbon/nitrogen (C/N) ratio, oxygen level, substrate concentration, and some cations. Ammnoia, Ammonium, Poultry litter, Dissociation constant, Henry’s Law constantĪmmonia (NH3) emission from poultry houses is a major air quality concern.