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Cited by 314Ruminant Nutrition and Digestive PhysiologyAnimal Nutrition and PhysiologyEssential Oils and Antimicrobial Activity

The DOI matches its Crossref record; 123 of the 124 references it cites were found in a registry or an index.

Plant extracts to manipulate rumen fermentation

Hart, K.J., Yáñez-Ruiz, D.R., Duval, S.M., McEwan, N.R., Newbold, C.J.·2008·Animal Feed Science and Technology
DOI 10.1016/j.anifeedsci.2007.09.007
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Abstract

The removal of antibiotic growth-promoters has led to an increased interest in alternative means of manipulating rumen fermentation. In this review we consider one of the possible alternatives: natural plant products including essential oils, saponins and related compounds. Essential oils have been used by man for many years. Their main effects in the rumen involve reduction of protein and starch degradation and an inhibition of amino acid degradation, due to selective action on certain rumen microorganisms, specifically some bacteria. One mode of action suggested for essential oils is an effect on the pattern of bacterial colonisation of, in particular starch rich, substrates as they enter the rumen. A second possible mode of action is their inhibition of “hyper ammonia producing bacteria” involved in amino acid deamination. However, the effect of essential oils depends on the chemical make up of the essential oils used, which is not always sufficiently described in the literature. Saponins are secondary compounds produced mainly by plants. A wide range of biological effects of saponins have been described, although the majority may be ascribed to their action on membranes. Here the effects of saponins on protozoa and fermentation end products are reviewed. There seems to be inconsistency in the effects of saponins in the rumen environment. It is suggested that this is due in part to the development of other microbial populations capable of degrading saponins in the rumen. This transient effect of saponins might limit their use in practical conditions. Organosulphurous supplements prepared from garlic have experienced increasing popularity in the last decade. Because the structure of the organosulphurous constituents in whole garlic is complicated, due to their volatility and rapid breakdown, their final concentration in different garlic preparations varies significantly. Effects have been reported on volatile fatty acid production, increased total volatile fatty acid production, with a stimulation in propionate, and decreased methane production, with a subsequent decrease in rumen methanaogens. Plant extracts thus have the potential to be exploited as rumen manipulating agents. The use of molecular techniques is helping to better describe the changes in the rumen environment to fully understand modes of action and fully exploit the use of plant extracts.

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Crossref · 10.1016/j.anifeedsci.2007.09.007

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Citations

Cites

Show all 124 references

Research works printed but not linked: 16

  1. Benchaar, 2003, Effects of essential oil supplements on ruminal fermentation, rumen microbial populations and in sacco degradation of dry matter and nitrogen in the rumen of lactating dairy cows, Can. J. Anim. Sci., 83, 637
  2. Diaz, 1993, Evaluation of Sapindus saponaria as a defaunating agent and its effects on different rumen digestion parameters, Livest. Res. Rural Dev., 5, 1
  3. Duval, 2004, Effect of a specific blend of essential oils on the colonization of substrates by rumen microorganisms, Reprod. Nutr. Dev., 44, S35
  4. Duval, 2005, Effects of a specific blend of essential oils on the colonization of stratch-rich substrates by rumen microorganisms, J. Anim. Sci., 83, 340
  5. Duval, 2006, Effect of essential oils on degradation of starch-rich substrates in a rumen simulating fermenter (RUSITEC), Reprod. Nutr. Dev., 44, S93
  6. Fernández, 1997, Efecto del aditivo Crina HC sobre la actividad degradativa ruminal en la especie ovina, Inf. Tech. Econ. Agraria, 18, 160
  7. Hart, 2006, Effect of allicin on fermentation and microbial populations in the rumen simulating fermentor Rusitec, Reprod. Nutr. Dev., 46, S97
  8. Liu, J.Y., Yuan, W.Z., Ye, J., Wu, Y, 2003. Effect of tea (Camellia sinensis) saponin addition on rumen fermentation in vitro. In: Matching herbivore nutrition to ecosystems biodiversity. Tropical and subtropical agrosystems. Proceedings of the Sixth International Symposium on the Nutrition of Herbivore. Merida, Mexico.
  9. McEwan, 2002, Effects of essential oils on protein digestion in the rumen, Reprod. Nutr. Dev., 42, S65
  10. McEwan, 2002, Effect of essential oils on ammonia production by rumen microbes, Reprod. Nutr. Dev., 42, S65
  11. Navas-Camacho, 1993, Effect of supplementation with a tree legume forage on rumen function, Livest. Res. Rural Dev., 5, 58
  12. Ningrat, 2002, Saponin fractions in Sapindus rarak: effects on rumen microbes, Reprod. Nutr. Dev., 42, S82
  13. Riguera, 1997, Isolating bioactive compounds from marine organisms, J. Mar. Biotechnol., 5, 187
  14. Ryan, 2003, The effects of different fractions of Yucca plant extract (De-oderase) on the fermentation of hay in ovine rumen fluid in vitro, J. Appl. Res. Vet. Med., 1, 132
  15. Thalib, 1996, The effects of saponin from Sapindus rarak on ruminal flora and fermentation characteristics in vitro, J. Ilmu Ternak dan Vertiner, 2, 17
  16. Wina, 2004, Effects of saponin containing methanol extract of Sapindus rarak on ruminal flora and fermentation characteristics in vivo, Reprod. Nutr. Dev., 44, S41

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Metadata

Authors
Hart, K. J., Yáñez-Ruiz, D. R., Duval, S. M., McEwan, N. R., & Newbold, C. J.
Affiliations
Aberystwyth University (GB)
Corresponding author
Hart, K.J.
ORCID
Venue
Animal Feed Science and Technology
Publisher
Elsevier BV
Published
2008-11
Volume
147
Issue
1-3
Pages
8-35
ISSN
0377-8401 (ISSN-L)
DOI
10.1016/j.anifeedsci.2007.09.007
OpenAlex
W2033536410
Cited by
314
References
124
Citations by year
2026: 7 · 2025: 9 · 2024: 16 · 2023: 10 · 2022: 13 · 2021: 29 · 2020: 23 · 2019: 26 · 2018: 16 · 2017: 21 · 2016: 18 · 2015: 16 · 2014: 31 · 2013: 19 · 2012: 19
FWCI
15.08
Type
journal article
Language
en
Open access
closed
Licence
www.elsevier.com/tdm/userlicense/1.0/ (tdm)
Locations
Animal Feed Science and Technology (publishedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › 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 › Food Science › Essential Oils and Antimicrobial Activity
Keywords
rumen fermentation, plant extracts, essential oils, saponins, garlic, rumen protozoa, rumen bacteria, volatile fatty acids, methane production, rumen methanogens, protein degradation, starch degradation, antibiotic alternatives

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