Chemical composition, in sacco degradation and in vitro gas production of some Ghanaian browse plants.
1998
Apori, S. O. | Castro, F. B. | Shand, W. J. | Orskov, E. R.
The nutritive value of leaves from 4 Ghanaian fodder trees, Spondias mombin, Antiaris toxicaria, Baphia nitida and Ficus exasperata and 3 shrubs, Thespesia populnea, Grewia carpinifolia and Griffonia simplicifolia (non-preferred syn. Bandeiraea simplicifolia), were evaluated by chemical, in sacco (sheep) and in vitro methods. Gliricidia sepium leaves were included as control feed. 5 kg of leaf samples were collected at the end of the rainy season; samples from each plant species were collected from at least 10 individual trees or shrubs and pooled for further analyses. Chemical analysis indicated that all samples were high in N (2.84-4.08%) and low in NDF (36.0-60.6%). With the exception of S. mombin leaves, which had 10.5% total extractable phenolic and 8.6% extractable tannin content, all other tested feeds were low in extractable phenolics (0.56-3.18%), extractable tannins (0.11-2.52%) and condensed tannins (.LT.1.21%). DM and protein degradation after 48 h incubation in sacco ranged from 60.0-87.5% and 73.1-93.4%, respectively. B. nitida showed the lowest degradability values (45.7 and 52.5%, respectively). A similar trend was observed from the in vitro gas production data. Use of polyethylene glycol 4000 (phenolic binding agent) indicated that inhibitory effect of phenolics on rumen microbial fermentation was minimal. The data presented show that the Ghanaian browse plants tested may be used as feed supplements.
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