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Effect of  anti nutritional factors on the productive performance of lactating cattle : a review
Poster Title: Effect of anti nutritional factors on the productive performance of lactating cattle : a review
Submitted on 18 Jul 2020
Author(s): Ahlam A. El Shewy
Affiliations: Food Industry and Nutrition Research Division , Dairy Sci. Dept ,NRC, Egypt
Poster Views: 134
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Poster Information
Abstract: In the plant sources, CT present in a free form, once the cattle ingest these plants, tannins combine with the dietary nutrients, particularly, protein forming a tannin-protein complex. This complex couldn't be degraded in the rumen, it is not absorbed into the blood stream, but it is excreted in the faeces without any benefit for the animal.
Also, tannins-rich feeds inhibit the cellulytic bacteria in the rumen via the dysfunction of the bacterial cell wall and decreasing the activity of the extracellular enzymes.
on the basis of the previous, the digestibility of the dietary protein, fiber, and organic matter would be decreased
Actually, both milk fat and milk protein contents would be decreased
Unpalatability due to astringency of tannins- rich feeds causes a decrease in the feed intake and subsequently, milk yield would be decreased
Summary: Tannins are one of antinutritional factors
that are divided into hydrolysable and
condensed tannins. .The condensed tannins
(CT) are the most wide spread and typical of
the plant sources. Some of trees and shrub
foliage and agro industrial –by products are
considered as tannins- rich feeds
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