Proximate Chemical Analysis and Effect of Age and Height of Oxytenanthera abyssinica on Fiber Morphology and Chemical Compositions for Pulp and Paper Production Potential

Table 4

Chemical composition value of Oxytenanthera abyssinica at 1-, 2-, and 3-year aged.

Age of the plant	Statically value	Cellulose (wt%)	Lignin (wt%)	Hemicellulose (wt%)	Ash (wt%)	Extractives (wt%)	Solubility
							Hot water (wt%)	1% NaOH (wt%)	Alcohol benzene (wt%)	Cold water (wt%)
3 years	N	3	3	3	3	3	3	3	3	3
		^a	^a	^a	^a	^a	^a		^a	^a
	95% CIL	47.39	18.73	16.06	2.09	5.18	9.25	16.89	1.02	3.30
	95% CIU	51.13	22.52	26.55	3.19	8.41	14.08	23.90	7.99	15.82
2 years	N	3	3	3	3	3	3	3	3	3
	x̄ ± STD	^b	^b	^b	^b	^b	^b		^a	^a
	95% CIL	44.21	21.21	20.03	3.78	6.28	5.92	11.33	2.46	6.48
	95% CIU	53.53	25.87	26.30	5.23	8.03	12.30	23.50	6.34	12.50
1 year	N	3	3	3	3	3	3	3	3	3
		^b	^b	^a	^c	^c	^c		^a	^a
	95% CIL	44.17	19.00	17.43	1.68	3.89	1.86	10.19	4.14	7.07
	95% CIU	52.25	27.00	24.66	11.57	11.44	13.21	18.92	4.27	10.32

All data were examined in triplicate, and the mean value ± standard deviation was used. Values in the same column with the identical English alphabetical letter are not significantly different () and the value in a and b are significantly difference (P ≤ 0.05), with a confidence limit of 95%. STD: standard deviation, CI_L: confidence interval lower, CI_U: confidence interval upper, N: number, : mean value.