Cited by 164Ruminant Nutrition and Digestive PhysiologyAnimal Nutrition and PhysiologyMilk Quality and Mastitis in Dairy Cows

Milk fatty acid composition, rumen microbial population, and animal performances in response to diets rich in linoleic acid supplemented with chestnut or quebracho tannins in dairy ewes

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Buccioni, A., Pauselli, M., Viti, C., Minieri, S., Pallara, G., Roscini, V., Rapaccini, S., Marinucci, M.Trabalza +3 more·2015·Journal of Dairy Science

Abstract

The aim of the study was to evaluate milk fatty acid (FA) profile, animal performance, and rumen microbial population in response to diets containing soybean oil supplemented or not with chestnut and quebracho tannins in dairy ewes. Eighteen Comisana ewes at 122±6 d in milking were allotted into 3 experimental groups. Diets were characterized by chopped grass hay administered ad libitum and by 800 g/head and day of 3 experimental concentrates containing 84.5 g of soybean oil/kg of dry matter (DM) and 52.8 g/kg of DM of bentonite (control diet), chestnut tannin extract (CHT diet), or quebracho tannin extract (QUE diet). The trial lasted 4 wk. Milk yield was recorded daily, and milk composition and blood parameters were analyzed weekly. At the end of the experiment, samples of rumen fluid were collected to analyze pH, volatile fatty acid profile, and the relative proportions of Butyrivibrio fibrisolvens and Butyrivibrio proteoclasticus in the rumen microbial population. Hepatic functionality, milk yield, and gross composition were not affected by tannin extracts, whereas milk FA composition was characterized by significant changes in the concentration of linoleic acid (CHT +2.77% and QUE +9.23%), vaccenic acid (CHT +7.07% and QUE +13.88%), rumenic acid (CHT -1.88% and QUE +24.24%), stearic acid (CHT + 8.71% and QUE -11.45%), and saturated fatty acids (CHT -0.47% and QUE -3.38%). These differences were probably due to the ability of condensed versus hydrolyzable tannins to interfere with rumen microbial metabolism, as indirectly confirmed by changes in the relative proportions of B. fibrisolvens and B. proteoclasticus populations and by changes in the molar proportions of volatile fatty acids. The effect of the CHT diet on the milk FA profile and microbial species considered in this trial was intermediate between that of QUE and the control diet, suggesting a differential effect of condensed and hydrolyzable tannins on rumen microbes. Compared with control animals, the presence of B. fibrisolvens increased about 3 times in ewes fed CHT and about 5 times in animals fed QUE. In contrast, the abundance of B. proteoclasticus decreased about 5- and 15-fold in rumen liquor of ewes fed CHT and QUE diets, respectively. The use of soybean oil and a practical dose of QUE or CHT extract in the diet of dairy ewes can be an efficient strategy to improve the nutritional quality of milk.

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  1. Burns, R. E. 1963. Methods of tannin analysis for forage crop evaluation. Technical Bulletin number 32. Georgia Agricultural Experiment Station, Athens.

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Authors
Buccioni, A., Pauselli, M., Viti, C., Minieri, S., Pallara, G., Roscini, V., Rapaccini, S., Marinucci, M. T., Lupi, P., Conte, G., & Mele, M.
Affiliations
  • University of Florence (IT)
  • University of Perugia (IT)
  • University of Pisa (IT)
Corresponding author
Buccioni, A.
Venue
Journal of Dairy Science
Published
2015-02
Volume
98
Issue
2
Pages
1145-1156
ISSN
0022-0302 (ISSN-L)
OpenAlex
W2072287163
Cited by
164
References
67
Citations by year
2026: 5 · 2025: 6 · 2024: 20 · 2023: 16 · 2022: 12 · 2021: 18 · 2020: 23 · 2019: 11 · 2018: 20 · 2017: 15 · 2016: 12 · 2015: 6
FWCI
21.93
Type
journal article
Language
en
Open access
Locations
  • Journal of Dairy Science (publishedVersion)
  • PubMed (publishedVersion)
  • Florence Research (University of Florence) (submittedVersion, other-oa)
  • CINECA IRIS Institutial research information system (University of Pisa) (submittedVersion, cc-by-nc-nd)
Funders
Universities of Florence, Pisa, and Perugia, and by Gruppo Mauro Saviola srl.
Topics
  • Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Ruminant Nutrition and Digestive Physiology
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Nutrition and Physiology
  • Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Milk Quality and Mastitis in Dairy Cows
Keywords
milk fatty acid composition, linoleic acid, chestnut tannin, quebracho tannin, proanthocyanidins, hydrolysable tannins, dairy sheep, rumen microbiota, Butyrivibrio fibrisolvens, volatile fatty acids, vaccenic acid, rumenic acid, milk yield
MeSH terms
Animals, Dairying, Diet, Digestion, Fatty Acids, Fatty Acids, Volatile, Female, Lactation, Milk, Nutritive Value, Plant Extracts, Rumen, Sheep, Soybean Oil, Tannins, Dietary Supplements, Linoleic Acid, Butyrivibrio

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