Agricultural Institute, BG-9700 Shumen, Bulgaria
PETROV, P., 2002. Effect of raspberry essence supplementation in the compound feeds on the productivity of growing pigs. Bulg. J. Agric. Sci., 8: 275–278
Two production trials with 150 growing hybrid pigs were carried out. The animals were equally allocated into two groups. The experiments started immediately after the weaning of the pigs at 35–40 days of age and were carried out in two subperiods – the first one until reaching 66–70 days of age and the second one to 98–105 days after their birth.
It was found that adding 0.75% raspberry essence to the compound feeds during the two subperiods of growing, increased the consumption of feed and of the nutrients by 9–10%. The average daily gain was higher by 45 g (P ≤ 0.01) and the liveweight by 2.854 kg (P ≤ 0.05). The conversion of feed and energy decreased by 6% and of protein and lysine – by 5%.