Evaluation of Elemental and Chemical Compositions of Some Fuelwood Species for Energy Value
Table 2
Effect of bark inclusion on hydrogen and nitrogen contents (%) of selected fuelwood species.
Tree species
Hydrogen
Nitrogen
100% W
5% B
10% B
100% B
Mean
100% W
5% B
10% B
100% B
Mean
A. leiocarpus
5.43a
4.79b
4.54c
4.37d
4.78a
0.22b
0.26ab
0.29ab
0.47a
0.31f
C. arereh
5.40a
4.95b
4.66c
4.11d
4.78a
0.22c
0.37b
0.38b
0.55a
0.38f
B. aegyptiaca
5.41a
4.93b
4.25c
3.73d
4.58ab
0.29c
0.39b
0.40ab
0.42a
0.38f
C. molle
4.98a
4.59ab
4.43b
4.33b
4.58ab
0.21c
0.49b
0.72a
0.76a
0.55de
T. mollis
4.95a
4.67ab
4.48ab
4.15b
4.56ab
0.46a
0.50a
0.49a
0.60a
0.51e
T. indica
4.62a
4.79a
4.41a
4.23a
4.51ab
0.08d
0.46c
0.76b
1.15a
0.61cd
S. birrea
5.24a
4.76b
4.40c
3.58d
4.49b
0.19c
0.71b
0.78b
0.96a
0.66c
C. lamprocarpum
4.72a
4.67a
4.38ab
4.11a
4.47b
0.78c
0.94b
0.96b
1.06a
0.94b
P. reticulatum
5.17a
4.28b
3.51c
3.02d
3.99c
1.08b
1.22a
1.26a
1.29a
1.21a
A. sieberiana
1.69a
4.37b
4.21bc
4.11c
4.34b
0.70c
0.93b
0.95b
1.45a
1.00b
W is the wood, and B is the bark. Values with the same alphabets within the same rows are not significantly different, and values with the same alphabets in the mean column are not significantly different using Duncan multiple range test at α = 0.05.