Deactivation of tannins in raisin stalk by polyethylene glycol-6000 effect on feed intake, digestibility, and nitrogen retention in sheep

Authors : MANOCHER SOURI, LALEH ANGAJI, MOHAMMAD MEHDI MOEINI

Pages : 443-449

Doi:10.3906/vet-1301-61

View : 18 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :An experiment was conducted to assess the effects of polyethylene glycol insert ignore into journalissuearticles values(PEG-6000); and urea on feed intake, nitrogen retention, and nutrient digestibility in sheep fed raisin stalk. Sixteen male fat-tailed Sanjabi sheep insert ignore into journalissuearticles values(26 ± 0.66 kg); were randomly assigned to one of 4 dietary treatments: raisin stalk insert ignore into journalissuearticles values(control; RS);, raisin stalk supplemented with 3% urea and 4% molasses insert ignore into journalissuearticles values(RSU3%);; 5% urea and 7% molasses insert ignore into journalissuearticles values(RSU5%);; or 5% urea, 7% molasses plus 5% PEG insert ignore into journalissuearticles values(RSU-PEG); per DM of raisin stalk. The urea and molasses were dissolved in distilled water and then mixed into a solid ingredient. Polyethylene glycol was also sprayed onto the diet with a solution of PEG in distilled water insert ignore into journalissuearticles values(5 g/10 mL);. The results indicated that feed intake, DM digestibility, average daily gain, and nitrogen retention significantly increased due to incorporation of molasses, urea, and PEG-6000, which may be associated with the inactivation of TEPH and TET. The digestibility of CP increased from -20.5% to 78.6%, and nitrogen retention in the PEG group was significantly higher than that in the other groups insert ignore into journalissuearticles values(P < 0.05);. No significant effect of urea alone was observed in the average daily gain. The negative effects of tannin on DM intake and N retention were alleviated when animals received molasses with 5% urea + 5% PEG.
Keywords : Raisin byproduct, digestive characteristics, tannin, N balance, fat tailed sheep