Biological effect of tannins from four tropical tree species
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Abstract
the biological effect of tannins as treatment. At the beginning of fermentation (4h), the trichanthera tannins had little effect on gas
production (P < 0.05). At 12h, the mulberry and moringa tannins showed the lowest biological effects, while those of leucaena and trichanthera the highest (P < 0.01). After 24 h of incubation, the moringa and leucaena tannins had similar effects and lower to the trichanthera tannins (P <0.001). From 48 h, the performance of the biological effect of tannins was trichanthera> leucaena> moringa> mulberry (P <0.001). There was only moderate biological effect on the kinetic parameters for leucaena and trichanthera tannins (P <0.001). Only the trichanthera tannins showed effect on the organic matter degradability (12%) and NDF (17.3%, P <0.01).The leucaena tannins had moderate biological effect in the NH3 concentration (11.3 %). The highest effects were observed for trichanthera tannins (29.4%, P <0.001). It is concluded that trichanthera tannins showed higher biological effect on the analyzed ruminal fermentation indicators, while in leucaena tannins were more moderate; those of moringa and mulberry did not influence on the nutritional value of them.
Key words: Moringa oleifera, Trichanthera gigantea, Morus alba, Leucaena leucocephala, tannins
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