Which tannin binding agents (as additive) can use to reduce the antinutritive effect on ruminant nutrition, when feeding legume tree leaves?
PEG with molecular weight of 4000 is the best. I have several publications and presentations and one review on this issue, which are available for down loading from Researchgate
Dear Resa,
The water-soluble polyethylene glycol (PEG) polymer contains a large number of oxygen atoms capable of forming hydrogen bonds with the phenolics groups in tannins. Since, both hydrolysable and condensed tannins contain phenolics groups, PEG can bind the two types of tannins.
Dear Prof N Silanikove,
Thank you very much. I have downloaded your publications related to tannin in ruminant nutrition. You have worked lot about the tannins and PEG. Those contain many facts that I really interested. thank you very much for your help.
PEG is the answer. But why do you want to bind the tannin?. It can be the way to supply by-pass protein (also called rumen non-degradable protein) to the animal.
PEG reduces the adverse effects of tannins in browse high tannins eg A karroo but low tannin helps to supply by-pass protein. The use of PEG is limited by cost. In Z
IT DEPENDS OF THE AMOUNT OF TANNINS IN THE FEED , IF IT IS NOT HIGH IT IS BENEFICIAL TO RUMINANTS AND INCRESE BY-PASS PROTEIN AND THE MICROBES IN THE RUMEN WILL DEGRADE TANNINS , IN HIGH CONCENTRATIONS YOU CAN USE PEG .
For legume tree leaves (browse) you can use polyethylene glycol (PEG) (molecular weight 4000 or 6000) and polyvinylpyrrolidone (PVP) as tannin binding agents. PEG is a better binding agent than PVP.
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