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Bioassay for measuring tannin effects based on gas production technique. 2. Dosage of polyethylene glycol

Published online by Cambridge University Press:  23 November 2017

I.C.S. Bueno*
Affiliation:
Laboratory of Animal Nutrition – Centre for Nuclear Energy in Agriculture (CENA/USP), CP 96, CEP 13400-970, Piracicaba, São Paulo, Brazil
S.L.S. Cabral Filho
Affiliation:
Laboratory of Animal Nutrition – Centre for Nuclear Energy in Agriculture (CENA/USP), CP 96, CEP 13400-970, Piracicaba, São Paulo, Brazil
E.F. Nozella
Affiliation:
Laboratory of Animal Nutrition – Centre for Nuclear Energy in Agriculture (CENA/USP), CP 96, CEP 13400-970, Piracicaba, São Paulo, Brazil
M.R.S.R. Peçanha
Affiliation:
Laboratory of Animal Nutrition – Centre for Nuclear Energy in Agriculture (CENA/USP), CP 96, CEP 13400-970, Piracicaba, São Paulo, Brazil
A.P. Minho
Affiliation:
Laboratory of Animal Nutrition – Centre for Nuclear Energy in Agriculture (CENA/USP), CP 96, CEP 13400-970, Piracicaba, São Paulo, Brazil
D.M.S.S. Vitti
Affiliation:
Laboratory of Animal Nutrition – Centre for Nuclear Energy in Agriculture (CENA/USP), CP 96, CEP 13400-970, Piracicaba, São Paulo, Brazil
A.L. Abdalla
Affiliation:
Laboratory of Animal Nutrition – Centre for Nuclear Energy in Agriculture (CENA/USP), CP 96, CEP 13400-970, Piracicaba, São Paulo, Brazil
H. Louvandini
Affiliation:
Laboratory of Animal Nutrition – Centre for Nuclear Energy in Agriculture (CENA/USP), CP 96, CEP 13400-970, Piracicaba, São Paulo, Brazil
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Extract

Tannins are secondary compounds that can bind protein and other nutrients and reduce their availability to the animals. Polyethylene glycol (PEG) has a great affinity with tannins and when it is added to the feed it is bound to tannins and releases the protein and other nutrients. There is no information about the amount of PEG that is needed to obtain the maximum precipitation of tannin and the minimum tannin effect. Some assays are conduced using doses of PEG according to the tannin content, but the activity of tannins can vary and this imply that the tannin analysis has to be done prior. The aim of this work was to evaluate doses of polyethylene glycol to minimize the effect of tannins on rumen fermentation.

Type
Poster Presentations
Copyright
Copyright © The British Society of Animal Science 2005

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References

France, J.; Dhanoa., M.S.,; Theodorou., M.K.,; Lister., S.J.,; Davies., D.R., and Isac, D., 1993. A model to interpret gas accumulation profiles associated with in vitro degradation of ruminant feeds. Journal of Theoretical Biology 42: 99111.CrossRefGoogle Scholar
Mauricio., R.M.,; Mould., F.L.,; Dhanoa., M.S.,; Owen, E.; Channa, K.S.; Theodorou., M.K., 1999. Semi automated in vitro gas production technique for ruminant feedstuff evaluation. Animal Feed Science and Technology 42: 321330.CrossRefGoogle Scholar
SAS Institute, 2000. The SAS system for windows. Release 8,01. Cary.Google Scholar

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