Tannins are water-soluble polyphenols with anti-nutritional properties
but when supplemented at a low dose to the diets may exhibit positive
effect on ruminants. Owing to great group diversity, tannins demonstrate various
biological activities. They form complexes with nutrients and so they are
enable to affect digestion processes. Thus, the aim of the study was to examine
the effect of two types of tannins on sheep pancreatic enzymes activity.
In the experiment 6 ewe of the Coloured Merino breed, fitted with catheters
to the common pancreatic-biliary duct and simple cannula to the duodenum
were used. Sheep were divided into 3 feeding groups for crossover design
(n = 2), and fed control diet (CON) and two experimental diets with dried lingonberry
leaves (VVI) or oak cortex (QUE) in a dose of 3 g ∙ d–1, as a source
of condensed and hydrolysable tannins, respectively. Non-significant effect of
tannins on pancreatic-biliary juice secretion and its protein concentration was
observed. In sheep fed diets with QUE addition lipase activity was increased in
comparison to animals receiving VVI. An upward trend in amylase and trypsin
activity after tannins addition was also found. Enriching sheep diets with additives
containing tannins slightly stimulated pancreas exocrine activity. However,
the inhibitory effects of tannins on endogenous protein activity, similar to the
digestive enzymes inhibitors action, cannot be excluded. So, further studies
on precise defining the mechanism of tannins action on enzymes activity and
digestion process in ruminants are necessary.
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The effect of supplementing sheep with rapeseed and linseed oils on the activity of pancreatic digestive enzymes Barbara Kowalik, Małgorzata P. Majewska, Renata Miltko, Grzegorz Bełżecki Journal of Animal Physiology and Animal Nutrition
Effect of Punica granatum and Tecomella undulata supplementation on nutrient utilization, enteric methane emission and growth performance of Murrah male buffaloes J. Hundal, I. Singh, M. Wadhwa, C. Singh, C. Uppal, G. Kaur Journal of Animal and Feed Sciences
Protozoa population and carbohydrate fermentation in sheep fed diet with different plant additives Małgorzata Majewska, Renata Miltko, Grzegorz Bełżecki, Aneta Kędzierska, Barbara Kowalik Animal Bioscience
Use of Hydrolyzed Chinese Gallnut Tannic Acid in Weaned Piglets as an Alternative to Zinc Oxide: Overview on the Gut Microbiota Junying Sun, Kaijun Wang, Baichang Xu, Xiaomin Peng, Beibei Chai, Siwei Nong, Zheng Li, Shuibao Shen, Hongbin Si Animals
Comparison of the Effect of Synthetic (Tannic Acid) or Natural (Oak Bark Extract) Hydrolysable Tannins Addition on Fatty Acid Profile in the Rumen of Sheep Małgorzata Majewska, Renata Miltko, Grzegorz Bełżecki, Aneta Kędzierska, Barbara Kowalik Animals
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