The effect of tannin extract and n-3 fatty acid source on nutrient digestibility, blood metabolites, enzyme activity, and ruminal parameters of lactating ewes

Authors : Roghayeh Valizadeh YONJALLI, Farzad Mirzaei AGHJEHGHESHLAGH, Ali MAHDAVI, Bahman NAVIDSHAD, Hamid STAJI

Pages : 724-732

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Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :This study aimed to evaluate the effects of tannin extract and n-3 fatty acid supplementation on nutrient digestibility, ruminal parameters, blood metabolites, and enzyme activity in lactating ewes. Thirty-six lactating ewes were allocated to 6 experimental groups. The dietary treatments were as follows: 1); control, 2); diet supplemented with 2% dry matter insert ignore into journalissuearticles values(DM); oak leaf tannin extract, 3); diet supplemented with 2% DM grape pomace tannin extract, 4); diet supplemented with 2% DM linseed oil, 5); diet supplemented with 2% DM oak leaf tannin extract and 2% DM linseed oil, and 6); diet supplemented with 2% DM grape pomace tannin extract and 2% DM linseed oil. The results showed the significant effects of treatments on final body weight, digestibility, and some blood metabolites insert ignore into journalissuearticles values(P < 0.05);. Therefore, the treatment groups had higher final body weight, better nutrient digestibility, and higher values of blood parameters. In conclusion, our results showed that the dietary tannin extract and the n-3 fatty acid source improved nutrient digestibility and blood metabolites, and they had a trend of improving the ruminal volatile fatty acid profile while not having any adverse effects on the animals` performance.
Keywords : Grape pomace, linseed oil, oak leaves, lactating ewe