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A Review: Tanniniferous Feed Resources in Ruminant Production

Manju Lata*, B.C Mondal

Uses of unconventional feeds are alternate sources to mitigate the shortage of grains and their byproducts. Since various unconventional feeds are produced in huge quantities every year and available comparatively at cheaper rate, therefore, the feed industry has a preference to use these materials in order to have maximum benefit from locally available unconventional feeds. Less than 4% in diet is however, advantageous to ruminants as it acts as a natural protein protectant and thus reduces the degradation of protein by forming Tannin Protein Complex (TPC) in the rumen and subsequently enhances the amino acids availability in lower gut, thereby increases the rumen bypass protein. It reduces proteolysis of forage protein in the rumen, reduces rumen and plasma ammonia concentrations, reduces blood plasma concentration and increases the net absorption of essential amino acids especially branched-chain amino acids from the small intestine. Tannin containing diet improved milk production and reproduction performance in dairy cows. Tannin is also hydrolyzed in the animal system and releases some antioxidants like catechin, epicatechin, catechin gallate, gallic acid etc., which have therapeutic values. These metabolites have certain properties like anti-oxidative and enhancer of reproduction performance. Catechin serves as powerful antioxidant against lipid peroxidation when phospholipid bilayers are exposed to aqueous oxygen radicals. The effect of tannins on animals ranges from beneficial to toxicity depending on the type of animals, age of animals, type and level of tannins in the feeds, the biological activity of tannins, level of tannin intake, quality of basal diets etc.

Published Date: 2021-09-22; Received Date: 2021-09-06