Abstract
The paper reports on the crude nutrient content and the mineral profile, as well as the apparent digestibility by ruminants, of faeces of poultry, pigs and cattle, poultry litter and solid matter of poultry, pig and cattle slurries. The second part of the paper deals with chemical treatment of pig and cattle slurry solids with NaOH, KOH and urea. Nutrient and mineral content as well as digestibility of animal excreta are greatly influenced by species, age and type of feeding, the bedding material used and the method of solid-liquid separation of slurries. The digestibility of poultry excreta is higher than that of pig waste. Cattle faeces are unsuitable as feeds even after chemical treatment. In sacco degradability, apparent digestibility, energy content and intake of pig slurry solids were increased by treatment with urea, NaOH and KOH. Level of chemicals used and temperature influenced the effect of treatment. Wet pig-slurry solids may be preserved with urea.
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