| Popis: |
Three processing methods, sun drying, roasting, and steam heating of poultry waste, were evaluated for their effect on the chemical composition and microbial population of the resulting dry wastes. They were evaluated further in terms of some physiological parameters using broiler chickens. The method of drying affected significantly the crude protein and crude fiber content of the dried waste. Steam heated and roasted poultry wastes did not produce microbial growth on culturing but sun dried poultry waste contained nonpathogenic Salmonella spp. The feeding of diets incorporating 10% of the variously dried wastes increased final body weight, body weight gain, and feed consumption, as compared to a waste-free (control) diet (P≤.05). Feed conversion efficiency decreased, the decrease being significant for the sundried waste diet. Carcass flavor was not significantly different among dietary treatments. Treatment differences in blood cellular elements were not significant. The histological study of the liver revealed no gross tissue changes. |
