Evaluation of Elemental and Chemical Compositions of Some Fuelwood Species for Energy Value

Table 5

Effect of bark inclusion on the lignin content (%) of selected fuelwood species.

Tree species	Fuel material composition
	100% wood	5% bark	10% bark	100% bark	Mean
Anogeisus leiocarpus	33.00^a	25.64^b	23.02^c	18.88^d	25.39^a
Caccia arereh	28.07^a	25.87^b	24.67^c	22.24^d	25.21^a
Balanites aegyptiaca	28.00^a	25.54^b	24.33^c	21.75^d	24.90^a
Combretum molle	27.04^a	24.96^b	23.47^c	21.24^d	24.18^b
Terminalia mollis	27.06^a	25.78^b	25.08^c	14.33^d	23.06^c
Tarmarindus indica	15.12^a	13.45^b	11.74^c	10.15^d	12.61^d
Sclerocarya birrea	15.00^a	12.84^b	11.62^c	10.11^d	12.39^d
Combretum lamprocarpum	14.11^a	12.61^b	11.62^c	10.31^d	12.16^d
Piliostigma reticulatum	12.49^a	11.50^b	10.67^c	9.34^d	11.00^e
Acacia sieberiana	13.36^a	10.90^b	9.89^c	8.58^d	10.68^e

Values with the same alphabets within the same species and among species in mean column are not significantly different using Duncan multiple range test at α = 0.05.