Table 5.

Total and individual volatile fatty acid (mM/L) production, in supernatant after 72 h incubation of 400 mg DM of browses with or without PEG

Scientific name	Acetic		Propionic		Iso butyric		Butyric		Valeric		Total VFA
	PEG(−)	PEG(+)	PEG(−)	PEG(+)	PEG(−)	PEG(+)	PEG(−)	PEG(+)	PEG(−)	PEG(+)	PEG(−)	PEG(+)
Acacia nilotica	45.0	52.2	14.13	13.09	1.16	1.73	2.86	4.55	1.58	2.21	64.7	73.7
Acacia sieberriana woodii	47.5	57.6	12.13	14.01	2.36	2.76	5.35	5.42	2.25	2.53	69.6	82.2
Combretum microphyllum	47.6	58.1	10.18	15.19	1.49	2.36	3.61	7.25	1.75	2.57	64.6	85.5
Combretum molle	43.4	48.8	9.12	9.66	1.09	1.25	2.70	2.69	1.40	1.50	57.7	63.9
Euphorbia tirucalli	72.4	76.9	16.26	16.89	1.89	2.12	8.53	9.28	2.41	2.57	101.5	107.8
Ficus religiosa	53.4	63.0	11.59	13.48	1.59	1.94	4.35	5.42	1.89	2.13	72.8	86.0
Ficus thronniggi	71.9	75.4	15.49	16.57	2.27	2.34	6.62	7.16	2.48	2.79	98.7	104.2
Lespendeza cuneata	46.7	61.6	11.67	15.09	1.51	2.36	3.47	5.84	2.12	2.97	65.5	87.9
Leucaena leucocephala	55.9	58.1	13.63	13.64	1.69	1.83	4.79	5.46	2.20	2.45	78.2	81.5
Kirkia acuminata	44.4	54.4	10.17	12.58	1.13	1.15	3.50	4.35	0.59	0.99	59.8	73.4
Kirkia willmsii	53.2	62.9	12.87	14.23	0.92	1.50	3.79	4.68	0.85	1.68	71.7	85.0
Melia azedarach	58.1	63.0	15.19	16.18	2.36	2.41	7.25	7.96	2.57	2.85	85.5	92.4
Morus alba	72.5	73.7	16.80	17.42	2.33	2.43	7.37	7.85	2.51	2.70	101.5	104.1
Olea africanum	42.5	44.1	9.50	9.46	1.32	1.37	5.62	5.50	1.70	1.64	60.7	62.1
Olea europaea	53.5	61.3	11.68	12.9	1.66	1.87	7.30	7.82	2.09	2.26	76.3	86.2
Peltrophorum africanum	48.2	52.8	10.77	12.42	1.55	2.18	2.82	5.15	1.70	2.39	65.0	75.0
Quercus rubica	45.5	49.1	9.71	10.76	1.13	1.35	3.94	4.72	1.51	1.68	61.7	67.6
Rhus lancea	42.2	63.9	9.65	12.79	1.17	1.95	4.39	5.54	1.21	2.11	58.6	86.3
Ziziphus mucronta	69.8	67.8	18.52	18.17	2.18	2.17	7.75	7.66	2.60	2.47	100.8	98.3

DM, dry matter; PEG, poly-ethylene glycol; VFA, volatile fatty acid; PEG(−), denotes presence of tannin; PEG(+), denotes absence of tannin.