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Proanthocyanadin (condensed tannin) content of Brachystegia spiciformis browse harvested at different stages of growth from three sites in Zimbabwe

Proanthocyanadin (condensed tannin) content of Brachystegia spiciformis browse harvested at... The extractable and insoluble (bound to protein or neutral detergent fibre [NDF] proanthocyanadin (PA) of the tree species Brachystegia spiciformis (Musasa) harvested at different stages of growth from three sites with different soil types in Zimbabwe was analysed by the n-butanol-HCl method. Brachystegia spiciformis samples from one site showed significantly lower (P < 0.05) PA values than those from the other two sites. Higher (P < 0.01) proportions of insoluble PA (insoluble PA/total PA) were observed in leaves than in twigs. Substantial levels of PA were detected as bound tannins, ranging from 470–804g kg−1. These results suggest that measurement of bound condensed tannin is necessary when identifying forages containing condensed tannins. The higher contents of PA in the leaves that were harvested when mature than in young leaves could explain why animals prefer eating young rather than mature leaves of B. spiciformis. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png African Journal of Range & Forage Science Taylor & Francis

Proanthocyanadin (condensed tannin) content of Brachystegia spiciformis browse harvested at different stages of growth from three sites in Zimbabwe

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Proanthocyanadin (condensed tannin) content of Brachystegia spiciformis browse harvested at different stages of growth from three sites in Zimbabwe

Abstract

The extractable and insoluble (bound to protein or neutral detergent fibre [NDF] proanthocyanadin (PA) of the tree species Brachystegia spiciformis (Musasa) harvested at different stages of growth from three sites with different soil types in Zimbabwe was analysed by the n-butanol-HCl method. Brachystegia spiciformis samples from one site showed significantly lower (P < 0.05) PA values than those from the other two sites. Higher (P < 0.01) proportions of insoluble PA (insoluble...
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Publisher
Taylor & Francis
Copyright
Copyright Taylor & Francis Group, LLC
ISSN
1727-9380
eISSN
1022-0119
DOI
10.2989/10220110609485905
Publisher site
See Article on Publisher Site

Abstract

The extractable and insoluble (bound to protein or neutral detergent fibre [NDF] proanthocyanadin (PA) of the tree species Brachystegia spiciformis (Musasa) harvested at different stages of growth from three sites with different soil types in Zimbabwe was analysed by the n-butanol-HCl method. Brachystegia spiciformis samples from one site showed significantly lower (P < 0.05) PA values than those from the other two sites. Higher (P < 0.01) proportions of insoluble PA (insoluble PA/total PA) were observed in leaves than in twigs. Substantial levels of PA were detected as bound tannins, ranging from 470–804g kg−1. These results suggest that measurement of bound condensed tannin is necessary when identifying forages containing condensed tannins. The higher contents of PA in the leaves that were harvested when mature than in young leaves could explain why animals prefer eating young rather than mature leaves of B. spiciformis.

Journal

African Journal of Range & Forage Science – Taylor & Francis

Published: Nov 1, 2006

Keywords: BROWSE LEGUME; PROANTHOCYANIDINS N-BUTANOL; STAGES

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