Tropical Animal Health and Production

, Volume 33, Issue 1, pp 57–66 | Cite as

Condensed Tannin and Saponin Content of Vigna unguiculata (L.) Walp, Desmodium uncinatum, Stylosanthes guianensis and Stylosanthes scabra Grown in Zimbabwe

  • J.J. Baloyi
  • N.T. Ngongoni
  • J.H. Topps
  • T. Acamovic
  • H. Hamudikuwanda


Samples of the tropical forage legumes Vigna unguiculata (L.) Walp (cowpea), Desmodium uncinatum (silverleaf desmodium), Stylosanthes guianensis (oxley fine stem stylo) and Stylosanthes scabra (fitzroy) and of natural pasture (veld) hay were analysed and ranked according to their proanthocyanidin (PA) and saponin content. Silverleaf desmodium and fitzroy leaf and stem samples of different ages were also separately analysed for the PA contents. All the samples analysed contained some PA but no saponins. High levels of PA were detected in silverleaf desmodium and very low levels in veld hay and cowpea. In all samples, more of the tannins were bound to protein or neutral detergent fibre (NDF) than were extractable, most being bound to proteins. The proportion of the unextractable PA was greater in younger than in mature materials.

cowpea desmodium fitzroy forage legume proanthocyanidin saponin stylo tannin 


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© Kluwer Academic Publishers 2001

Authors and Affiliations

  • J.J. Baloyi
    • 1
  • N.T. Ngongoni
    • 2
  • J.H. Topps
    • 3
  • T. Acamovic
    • 4
  • H. Hamudikuwanda
    • 2
  1. 1.Zimbabwe Open UniversityMasvingoZimbabwe
  2. 2.Department of Animal ScienceUniversity of ZimbabweHarareZimbabwe
  3. 3.Department of AgricultureUniversity of AberdeenAberdeenUK
  4. 4.Department of Biochemistry and Nutrition, Scottish Agricultural CollegeAuchincruiveUK

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