EFFECT OF 20-HYDROXYECDYSONE ON THE PROTEIN-SYNTHESIS OF PIGS

In three metabolic experiments in seven balance periods the effect of 20-hydroxyecdysone on proteosynthesis in growing pigs was studied in 3 0 individuals. On an identical genotype of animals (BU x L x Pn), dose s of 0.2 mg/kg of body weight and 0.4 mg/kg of body weight were examin ed. Effectiveness was found already in a dose of 0.2 mg/kg body weight and it resulted in higher values of resorption and retention of nitro gen in experimental animals. Statistically significant differences wer e observed particularly in the third experiment where a high significa nce (P less than or equal to 0.01) of protein deposition in animal bod ies was found. In two feeding experiments (40 animals), a higher incre ase in body weight by 12-16 % in the period of 30 days after administr ation of macromolecular pellets of 20-hydroxyecdysone was found. Also lower consumption of feedstuffs by 11-17 % per 1 kg of an increase in body weight was found. In the evaluation of the principal meat parts o f slaughtered animals after the termination of feeding (109.5 kg of bo dy weight) the values were not statistically significant in comparison with the control group.