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Effects of condensed tannins in Lotus pedunculatus on its nutritive value for sheep. 1. Non-nitrogenous aspects

Published online by Cambridge University Press:  27 March 2009

G. C. Waghorn ,
I. D. Shelton  and
W. C. McNabb
G. C. Waghorn
Affiliation:
Ag Research, Grasslands Research Centre, Private Bag 11008, Palmerston North, New Zealand
I. D. Shelton
Affiliation:
Ag Research, Grasslands Research Centre, Private Bag 11008, Palmerston North, New Zealand
W. C. McNabb
Affiliation:
Department of Animal Science, Massey University, Palmerston North, New Zealand
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Summary

Lotus pedunculatus was grown under high fertility conditions and its nutritive value was determined in a feeding trial with sheep at Palmerston North, New Zealand in 1989. The condensed tannins (CT) accounted for 5·5 % of lotus dry matter (DM) and its effect on digestion was evaluated by giving an intraruminal infusion of polyethylene glycol (PEG) to six of the sheep (PEG group). PEG preferentially binds with CT so that the lotus becomes essentially CT-free.

The experiment was carried out with 14 sheep (six PEG and eight ‘Tannin’) held in metabolism crates indoors and given freshly cut lotus hourly, for 32 days. This paper presents data relating to carbohydrate and mineral digestion, together with aspects of rumen function.

Digestibility of lotus DM was 68%, and the digestibility of fibre was not affected by CT. Infusion of PEG increased rumen concentrations of NH3 and volatile fatty acids (P < 0·001) but effects on molar ratios of VFA were inconsistent with time. CT reduced rumen degradation and absorption of sulphur and increased net absorption of both phosphorus and zinc, but other effects on mineral digestion were small.

Although the lotus was offered at c. 90% of ad libitum, intakes of the tannin sheep began to decline after c. 15 days of feeding and were c. 12% lower than those of the PEG sheep at the end of the trial (P < 0·05). At slaughter, rumen pool sizes were similar for the two treatments but the Tannin sheep had a lower fractional outflow rate, which suggests a slower rate of digestion in the rumen. Growth rate and wool production were similar for sheep on both treatments. It is concluded that the CT in Lotus pedunculatus grown under high fertility conditions had little effect on fibre and mineral digestion but the depression in DM intake reduced its nutritive value for sheep.

Type
Animals
Information
The Journal of Agricultural Science , Volume 123 , Issue 1 , August 1994 , pp. 99 - 107
Copyright
Copyright © Cambridge University Press 1994

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References

Barry, T. N. & Duncan, S. J. (1984). The role of condensed tannins in the nutritional value of Lotus pedunculatus for sheep. 1. Voluntary intake. British Journal of Nutrition 51, 485–491.Google Scholar
Barry, T. N. & Forss, D. A. (1983). The condensed tannin content of vegetative Lotus pedunculatus, its regulation by fertiliser application, and effect upon protein solubility. Journal of the Science of Food and Agriculture 34, 1047–1056.Google Scholar
Barry, T. N. & Manley, T. R. (1984). The role of condensed tannins in the nutritional value of Lotus pedunculatus for sheep. 2. Quantitative digestion of carbohydrates and proteins. British Journal of Nutrition 51, 493–504.Google Scholar
Binnerts, W. T., Van't Klooster, A. Th. & Frens, A. M. (1968). Soluble chromium indicator measured by atomic absorption in digesta experiments. Veterinary Record 82, 470–472.Google Scholar
Broadhurst, R. B. & Jones, W. T. (1978). Analysis of condensed tannins using acidified vanillin. Journal of the Science of Food and Agriculture 29, 788–794.Google Scholar
Faichney, G. J. (1975). The use of markers to partition digestion within the gastro-intestinal tract of ruminants. In Digestion and Metabolism in the Ruminant (Eds McDonald, I. W. & Warner, A. C. I.), pp. 277–291. Armidale: University of New England Publishing Unit.Google Scholar
Gerson, T., John, A., Shelton, I. D. & Sinclair, B. R. (1982). Effects of dietary N on lipids of rumen digesta, plasma, liver, muscle and perirenal fat in sheep. Journal of Agricultural Science, Cambridge 99, 71–78.Google Scholar
Grace, N. D. (Ed.) (1983). The Mineral Requirements of Grazing Ruminants. Palmerston North: New Zealand Society of Animal Production.Google Scholar
Jones, W. T. & Mangan, J. L. (1977). Complexes of the condensed tannins of sainfoin (Onobrychis viciifolia Scop.) with Fraction 1 leaf protein and with submaxillary mucoprotein, and their reversal by polyethylene glycol and pH. Journal of the Science of Food and Agriculture 28, 126–136.Google Scholar
Kraiem, K., Garrett, J. E., Meiske, J. C., Goodrich, R. D. & Marten, G. C. (1990). Influence of method of forage preservation on fibre and protein digestion in cattle given lucerne, birdsfoot trefoil and sainfoin. Animal Production 50, 221–230.Google Scholar
Lee, J. (1983). Multi-element analysis of animal tissue by inductively coupled plasma emission spectrometry. ICP Information Newsletter 8, 553–556.Google Scholar
McNabb, W. C., Waghorn, G. C., Barry, T. N. & Shelton, I. D. (1993). The effect of condensed tannin in Lotus pedunculatus on digestion and metabolism of sulphur amino acids and inorganic sulphate in sheep. British Journal of Nutrition 70, 647–661.Google Scholar
Pritchard, D. A., Stocks, D. C., O'Sullivan, B. M., Martin, P. R., Hurwood, I. S. & O'Rourke, P. K. (1988). The effect of polyethylene glycol (PEG) on wool growth and liveweight of sheep consuming a mulga (Acacia aneura) diet. Proceedings of the Australian Society of Animal Production 17, 290–293.Google Scholar
Robertson, J. B. & Van Soest, P. J. (1980). The detergent system of analyses and its application to human foods. In Basic and Clinical Nutrition Vol 3 (Eds James, W. P. T. & Theander, O.), pp. 123–158. New York: Marcel Dekker.Google Scholar
Tan, T. N., Weston, R. H. & Hogan, J. P. (1971). Use of 103Ru-labelled tris (1,10-phenanthroline) ruthenium (II) chloride as a marker in digestion studies with sheep. International Journal of Applied Radiation and Isotopes 22, 301–308.Google Scholar
Technicon Industrial Systems (1973). Autoanalyser II Method no 270–73 W. Tarrytown, NY 10591, USA: Technicon Limited.Google Scholar
Terrill, T. H., Windham, W. R., Hoveland, C. S. & Amos, H. E. (1989). Forage preservation method influences on tannin concentration, intake and digestibility of sericea lespedeza by sheep. Agronomy Journal 81, 435–439.Google Scholar
Terrill, T. H., Rowan, A. M., Douglas, G. B. & Barry, T. N. (1992). Determination of extractable and bound condensed tannin concentrations in forage plants, protein concentrate meals and cereal grains. Journal of the Science of Food and Agriculture 58, 321–329.Google Scholar
Terrill, T. H., Waghorn, G. C., Woolley, D. J., McNabb, W. C. & Barry, T. N. (1994). Assay and digestion of Relabelled condensed tannin in the gastro-intestinal tract of sheep. British Journal of Nutrition.Google Scholar
Ulyatt, M. J. & Egan, A. R. (1979). Quantitative digestion of fresh herbage by sheep. V. The digestion of four herbages and prediction of sites of digestion. Journal of Agricultural Science, Cambridge 92, 605–616.Google Scholar
Waghorn, G. C., Ulyatt, M. J., John, A. & Fisher, M. T. (1987). The effect of condensed tannins on the site of digestion of amino acids and other nutrients in sheep fed on Lotus corniculatus L. British Journal of Nutrition 57, 115–126.Google Scholar
Waghorn, G. C., Shelton, I. D. & Sinclair, B. R. (1990). Distribution of elements between solid and supernatant fractions of digesta in sheep given six diets. New Zealand Journal of Agricultural Research 33, 259–269.Google Scholar
Waghorn, G. C., Shelton, I. D., McNabb, W. C. & McCutcheon, S. N. (1994). Effects of condensed tannins in Lotus pedunculatus on its nutritive value for sheep. 2. Nitrogenous aspects. Journal of Agricultural Science, Cambridge 123, 109–119.Google Scholar
Williams, C. H. & Twine, J. R. (1967). Determination of nitrogen, sulphur, potassium, sodium, calcium and magnesium in plant material by automatic analysis. Technical Paper, Commonwealth Scientific and Industrial Research Organisation 24, 119–126.Google Scholar