Caswell, Larry Forrest2016-05-232016-05-231972http://hdl.handle.net/10919/71076Various broiler litter processing methods were evaluated. Treatments effective for litter pasteurization were dry heating at a depth of 0.63 cm for 20 min; autoclaving for 10 min. or longer; dry heating following the addition of 1 to 4 g of paraformaldehyde (PFA) per 100 g of litter at depths of 0.63 and 2.54 cm; and ethylene oxide (ETO) fumigation for 30 min. or longer. Moisture and uric acid nitrogen were lowered (P < .01) for dry heat and the PFA processes. Autoclaving and PFA addition followed by dry heating lowered (P < .01) NPN. Ammonia nitrogen was reduced (P < .01) by all pasteurizing treatments except autoclaving for 10 min. A metabolism trial was conducted with sheep. Litter pasteurized by dry heating at a depth of 0.63 cm for 20 min., dry heating at a depth of 2.54 cm after the addition of 2 g of PFA per 100 g of litter or fumigation with ETO at a depth of 15.24 cm for 60 min. supplied 50% of the nitrogen in the respective rations. Processing method had no significant effect on nitrogen utilization and apparent digestion coefficients. Ruminal ammonia nitrogen was higher (P < .05) for the dry heat than for the ETO treatment. Acetic acid and total VFA's, expressed as µ mole/ml were higher (P < .05) for the PFA than the dry heat treatment. Expressed as moles/100 moles, propionic was higher (P < .05) for the ETO than for the PFA treatment.v, 92 leavesapplication/pdfenIn CopyrightLD5655.V855 1972.C3884Thesis