Mycelium Waste in the Compound Feeds for Growing Pigs

Agricultural Institute, BG-9700 Shumen, Bulgaria


PETROV, P., 2006. Mycelium waste in the compound feeds for growing pigs. Bulg. J. Agric. Sci, 12: 587-595

Two experiments, comprising 54 pigs from the Shumen 1 hybrid were carried out at the Agricultural Institute - Shumen. The pigs were divided into three groups consisting of 9 castrated males. The experiments began immediately after weaning at 34-29 days of age and finished at 97 and 93 days of age for the first and the second experiment respectively. The animals of the control and the experimental groups were fed compound feeds with equal level of energy, protein, amino acids and trace minerals. The difference in feeding consisted of the following: 10% dry matter of the basic compound feed (group I) were substituted by the same amount of dry matter of moist tylosine mycelium (group II) and the same percentage dry matter was substituted by dry tylosine mycelium (group III). It was established that including moist or dry non-inactivated mycelium in the feeds for the experimental groups led to the same results in relation to growth rate and feed conversion which decreased by 5-10%. No morphological changes were found out in the digestive organs and endocrinal glands in pigs fed non-inactivated mycelium. Tylosine was found out in the bile secretion in the pigs received moist non-inactivated mycelium and in the pigs received dry non-inactivated mycelium, tylosine was found in the urine.

Key words: pigs, feeding, mycelium, feed conversion