V. Radev*, I. Varlyakov, T. Slavov, R. Mihaylov
Abstract. The investigation was carried out with five yearling sheep, Stara Zagora meat type and Pleven Blackhead crosses. The average live body weight of animals at the beginning of the experiment was 55±4 кg. The effect of supplementation of animal rations with dried distillers grains with solubles (DDGS) on duodenal chyme pH, total volatile fatty acid and ammonia concentrations was studied. Zarnela – dried distillers grains with solubles is a by-product of wheat ethanol production manufactured by the еthanol producing enterprise at Gorna Oryahovitsa, Bulgaria. The experiment was conducted in two periods – control and experimental. During the control period, animals were fed a ration consisting of 1.000 kg meadow hay and 1.000 kg barley mash. During the experimental period, the ration contained 0.800 kg barley mash, 0.200 kg DDGS (Zarnela) and 1.000 kg meadow hay. The dietary supplementation with Zarnela at 0.200 kg had the following effects on studied duodenal chyme parameters: duodenal chyme pH increased both before (p<0.05) and 2.5 hours (p<0.01) after feeding, an insignificant increase in duodenal chyme total volatile fatty acid concentrations, both before and after feeding was established and duodenal chyme ammonia concentrations became higher before (p<0.05) and after feeding (p<0.01).