Abstract: This study was conducted to investigate the fermented diet including grape and apple pomace on amino digestibility, nitrogen balance and volatile fatty acid in finishing pigs. A total of 24 finishing pigs ((Yorkshire x Landrace) x Duroc) with an average BW of 63.42±9.78 kg were used in this experiment. Pigs were allotted to 6 experiment diets according to initial BW. Dietary treatments were: CON (dry compound diet), (fermented liquid compound diet), GF10 (fermented liquid compound diet with 10% grape pomace), GF20 (fermented liquid compound diet with 20% grape pomace), AF10 (fermented liquid compound diet with 10% apple pomace) and AF20 (fermented liquid compound diet with 20% apple pomace). The DM, CP and CF digestibility was highest (p<0.05) in CON and F treatments among treatments. The DM, EE, ash and Ca digestibility was highest (p<0.05) in AF10 treatment among treatments. All the detected Essential amino acid and non-essential amino acids digestibility were highest (p<0.05) in F treatment among treatments. All the detected essential amino acid and non-essential amino acids digestibility were lowest (p<0.05) in AF20 treatment except leucine and and proline digestibility were lowest (p<0.05) in GF20 treatment among treatments. The total essential amino acids, total non-essential amino acids and total amino acid digestibility was highest (p<0.05) in CON and F treatments and lowest in AF20 treatment among treatments. The dietary Lactobacillus concentration was increased (p<0.05) as the order of treatments listed in table and the Enterobacteriaceae concentration was decreased (p<0.05) in reverse order. The fecal acetic acid, isobutyric acid and isovaleric acid emission were higher (p<0.05) in CON treatment than other treatments. The slurry acetic acid, butyric acid, isobutyric acid and isovaleric acid emission was higher (p<0.05) in AF10 treatment than other treatments. The feed intake and feces excretion were highest (p<0.05) in AF20 treatments among treatments. The feces (DM) excretion was highest in GF20 treatment and lowest (p<0.05) in F treatment among treatments. The Fecal nitrogen, urinary nitrogen, nitrogen retention, fecal nitrogen excretion ratio, urinary nitrogen excretion ratio and nitrogen retention ratio were highest in AF20 treatment, F treatment, AF10 treatment, AF20 treatment, CON treatment and AF10 treatment, respectively. In conclusion, the supplementation of grape and apple pomace in finishing pig diets limited the approximate chemical composition and amino acid digestibility. The supplementation of grape and apple pomace in finishing pig diets could benefit the beneficial bacterial and decreased VFA emission in feces. High apple pomace (20%) supplementation level caused high feces excretion. The low level (10%) of apple pomace supplementation improved the nitrogen retention.
S.B. Cho, J.H. Cho, O.H. Hwang, S.H. Yang, K.H. Park, D.Y. Choi, Y.H. Yoo and I.H. Kim, 2012. Effects of Fermented Diets Including Grape and Apple Pomace on Amino Acid Digestibility, Nitrogen Balance and Volatile Fatty Acid (VFA) Emission in Finishing Pigs. Journal of Animal and Veterinary Advances, 11: 3444-3451.