Contents of phenolics, protein precipitation capacity of tannin in browse and ability to predict them in diets from faecal composition in sheep

Kumara Mahipala, Gaye Krebs, Peter McCafferty, Kenneth Dods

Research output: Book chapter/Published conference paperConference paper

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Abstract

Potential of faecal composition to predict contents and biological effects of tannin in Saligna (Acacia saligna), Tagasaste (Cytisus proliferus) and Saltbush (Atriplex amnicola) diets were investigated in three feeding trials. Each browse and Oat (Avena sativa) experimental diet fed for 6 replicate sheep. Total phenolics (TPC) and tannin (TTC) contents, protein precipitation capacity of tannin (PPC), in-vitro gas production (ivGP), in-vitro organic matter digestibility (ivOMD) and in-vitro metabolizable energy contents (ivME) of experimental diets were determined. Respective faeces were analyzed for proximate composition. Data from the 3 trials were pooled to generate predictive models.The TTC content of Saligna was greater as 36.2 gkg-1 while that of Tagasaste and Saltbush were lower as 6.4 g/kg DM and g/kg DM, respectively. Tannin of Saligna reported the highest PPC (27.3 g/kg DM) and reduced the ivGP, ivOMD and ivME, significantly (P<0.001). Biological effects of low tannin contents in Tagasaste and Saltbush were negligible. Strong leaner relationships (P<0.0001) were found between faecal acid detergent fiber, acid detergent lignin and N contents with TPC and TTC and PPC of tannin in diets. Antinutrive effects and the ability of faecal composition to predict phenolic contents and their biological effects of browse diets were evident in sheep.
Original languageEnglish
Title of host publication22nd General Meeting
Subtitle of host publicationBiodiversity and animal feed: Future challenges for grassland production
EditorsA. Hopkins, T. Gustafsson, J. Bertilsson, G. Dalin, N Nilsdotter- Nilsdotter-Linde, E. Sporndly
Place of PublicationSweden
PublisherEuropean Grassland Federation
Pages474-476
Number of pages3
Volume13
ISBN (Electronic)9789185911486
Publication statusPublished - 2008
EventEuropean Grassland Federation General Meeting - Uppsala, Sweden, Sweden
Duration: 09 Jun 200812 Jun 2008

Conference

ConferenceEuropean Grassland Federation General Meeting
CountrySweden
Period09/06/0812/06/08

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    Mahipala, K., Krebs, G., McCafferty, P., & Dods, K. (2008). Contents of phenolics, protein precipitation capacity of tannin in browse and ability to predict them in diets from faecal composition in sheep. In A. Hopkins, T. Gustafsson, J. Bertilsson, G. Dalin, N. N. Nilsdotter-Linde, & E. Sporndly (Eds.), 22nd General Meeting: Biodiversity and animal feed: Future challenges for grassland production (Vol. 13, pp. 474-476). European Grassland Federation.