Ph, Ammonia Flux, and Total Nitrogen in Duck Litter with Chemical Blends - A Field Study
ABSTRACT This study was designed to evaluate the effects of chemical blend additives to duck litter on pH, ammonia (NH3) fluxes, total nitrogen (TN) under a small pen trial. One hundred twenty 1-day-old duck (pekin) were randomly assigned to 6 pens in a completely randomized design during 6 weeks. Control received no litter treatment whereas top-dressed treatment at rates of 50 g aluminum sulfate + 50 aluminum chloride/kg duck litter were mixed into the upper 1 cm of duck litter. Duck litter pH at 2 weeks through 5 weeks was significantly affected (p<0.05) by chemical blend treatments compared to controls, but not at 6 weeks. During the experimental periods, NH3 fluxes decreased (p<0.05) in chemical blend treatments. However, there were no remarkable difference (p>0.05) between treatments at 0 and 1 week. Reductions of NH3 fluxes at 3, 4, 5 and 6 weeks were 31, 16, 29 and 24%, respectively. Chemical blend treatments as a function of time resulted in increase in TN contents compared with control. There were no significant differences (p>0.05) in TN between treatments at 2 and 3 weeks, except for 4, 5 and 6 weeks. Chemical blend decreases NH3 fluxes and increases TN positively by reducing duck litter pH.