African Journal of Biotechnology Vol. 6 (10), pp. 1260-1265, 16 May 2007   

ISSN 1684–5315 © 2007 Academic Journals        

Full Length Research Paper

In vitro fermentation characteristics and acceptability by West African dwarf goats of some dry season forages

Babayemi Olaniyi Jacob

Department of Animal Science, University of Ibadan, Ibadan, Nigeria E-mail: oj.babayemi@mail.ui.edu.ng.

Accepted 21 February, 2007

Total weight gained by small ruminants in the rainy season is lost in the dry season due to feed scarcity. Feed supplementation with dry season browse trees, legumes and grasses for ruminants is prudent.  Proximate composition, acceptability using twenty four West African dwarf (WAD) goats and in vitro gas production of dry season forages were determined. Crude protein content ranged from 7.9% in Panicum maximum to 25.7% in Leucaena leucocephala. Crude fibre composition was generally high (range 56.8 - 74.1%) among the forages. Pa. maximum, Gliricidia sepium, L. leucocephala and Terminalia catappa were acceptable as coefficient of preference was above unity. Net gas production (NGP) and potential gas (PG) ranged from 41 - 59.7 ml/24 h and 98.5 - 4,545 ml, respectively. Highest (P < 0.05) and lowest (P > 0.05) gas (production were obtained in Gliricidia and Leucaena, respectively. The value for the metabolizable energy (ME) (MJ/kg DM), organic matter digestibility (OMD) (%) and short chain fatty acids (SCFA) (µml) ranged from 8.31 - 1.88, 57.68 - 81.09 and 0.90 - 1.35, respectively. The ME, OMD and SCFA were highest (P < 0.05) in G. sepium. Methane (ml/200 mg DM) production ranged from 18 – 24, the highest being from G. sepium and the least from Pennisetum purpureum.

Key words: Grass, legumes, browse trees, preference, gas production, goats