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Effect of dietary tannin supplementation on cow milk quality in two different grazing seasons

Menci, Ruggero; Natalello, Antonio; Luciano, Giuseppe; Priolo, Alessandro; Valenti, Bernardo; Farina, Giovanni; Caccamo, Margherita; Niderkorn, Vincent and Coppa, Mauro (2021) Effect of dietary tannin supplementation on cow milk quality in two different grazing seasons. Scientific Reports, 11, p. 19654.

[thumbnail of Menci et al - SciRep.pdf] PDF - Published Version - English

Document available online at: https://www.nature.com/articles/s41598-021-99109-y


Extensive farming systems are characterized by seasons with different diet quality along the year, as pasture availability is strictly depending on climatic conditions. A number of problems for cattle may occur in each season. Tannins are natural polyphenolic compounds that can be integrated in cows’ diet to overcome these seasonal problems, but little is known about their effect on milk quality according to the season. This study was designed to assess the effects of 150 g/head × day of tannin extract supplementation on proximate composition, urea, colour, cheesemaking aptitude, antioxidant capacity, and fatty acid (FA) profile of cow milk, measured during the wet season (WS) and the dry season (DS) of Mediterranean climate. In WS, dietary tannins had marginal effect on milk quality.
Conversely, in DS, the milk from cows eating tannins showed 10% lower urea and slight improvement in antioxidant capacity, measured with FRAP and TEAC assays. Also, tannin extract supplementation in DS reduced branched-chain FA concentration, C18:1 t10 to C18:1 t11 ratio and rumenic to linoleic acid ratio. Tannins effect on rumen metabolism was enhanced in the season in which green herbage was not available, probably because of the low protein content, and high acid detergent fibre and lignin contents in diet. Thus, the integration of tannin in the diet should be adapted to the season. This could have practical implications for a more conscious use of tannin-rich extracts, and other tannin sources such as agro-industrial by-products and forages.

EPrint Type:Journal paper
Keywords:tannins, extensive farming, dairy cows, milk, seasonal variation, Proyoungstock
Agrovoc keywords:
extensive farming
dairy cows
seasonal variation
Subjects: Animal husbandry > Production systems > Dairy cattle
Food systems > Food security, food quality and human health
Animal husbandry > Feeding and growth
Research affiliation: European Union > CORE Organic > CORE Organic Cofund > ProYoungStock
France > INRAe - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement
Italy > Univ. Perugia
Italy > Univ. Catania
Horizon Europe or H2020 Grant Agreement Number:727495
Related Links:https://www.proyoungstock.net/index.html
Deposited By: Menci, Mr. Ruggero
ID Code:42570
Deposited On:10 Nov 2021 09:04
Last Modified:10 Nov 2021 09:04
Document Language:English
Refereed:Peer-reviewed and accepted

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