Table 1. Properties of the wood of Diospyros kaki trees

Properties	Axial direction			Average	p-value
Properties	Base	Middle	Top		Wood category	Axial variation
Boundary between juvenile and mature wood (mm)	44 ± 2.65	44 ± 3.21	44.33 ± 3.28	44.11 ± 0.11		0.996^ns
Juvenile wood proportion (%)	64.18 ± 3.20	64.79 ± 3.25	71.51 ± 1.90	66.83 ± 2.35		0.212^ns
Mature wood proportion (%)	35.82 ± 3.20	35.21 ± 3.25	28.48 ± 1.90	33.17 ± 2.35		0.212^ns
Fiber length (mm)	1.34 ± 0.04	1.31 ± 0.04	1.35 ± 0.04	1.33 ± 0.01		0.724^ns
Vessel element (mm)	0.33 ± 0.01	0.35 ± 0.01	0.36 ± 0.01	0.35 ± 0.01		0.173^ns
Fiber diameter (μm)					0.047^*	0.785^ns
Juvenile area	17.31 ± 1.47	17.60 ± 1.16	17.71 ± 1.29	17.54 ± 0.21
Mature area	15.81 ± 1.69	17.51 ± 1.63	15.44 ± 1.25	16.25 ± 1.10
Fiber lumen diameter (μm)					0.061^ns	0.804^ns
Juvenile area	10.25 ± 2.09	10.89 ± 1.30	11.08 ± 2.67	10.74 ± 0.43
Mature area	8.68 ± 1.70	10.60 ± 1.36	8.75 ± 1.30	9.34 ± 1.09
Fiber wall thickness (μm)					0.151^ns	0.329^ns
Juvenile area	3.25 ± 0.52	3.09 ± 0.45	3.39 ± 0.32	3.24 ± 0.15
Mature area	3.49 ± 0.29	3.33 ± 0.22	3.66 ± 0.10	3.49 ± 0.17
Vessel diameter (μm)					0.575^ns	0.014^*
Juvenile area	74.18 ± 2.46	83.08 ± 11.02	92.24 ± 10.89	83.17 ± 9.03
Mature area	76.26 ± 2.03	85.86 ± 9.19	94.64 ± 9.03	85.59 ± 9.19
Vessel frequency (∑ vessels/mm²)					0.086^ns	0.422^ns
Juvenile area	5.67 ± 1.15	5.33 ± 0.58	5.33 ± 1.15	5.44 ± 0.19
Mature area	5.44 ± 0.19	4.00 ± 1.00	5.33 ± 0.58	4.92 ± 0.80
Ray parenchyma frequency (∑ ray parenchyma/mm²)					0.307^ns	0.028^*
Juvenile area	12.33 ± 0.58	13.00 ± 1.00	11.33 ± 1.53	12.22 ± 0.84
Mature area	12.67 ± 1.53	14.00 ± 0.00	11.67 ± 1.15	12.78 ± 1.17
Ray parenchyma height (μm)					0.402^ns	0.299^ns
Juvenile area	311.33 ± 6.23	311.22 ± 5.73	308.17 ± 5.26	310.24 ± 1.79
Mature area	312.74 ± 8.42	305.42 ± 2.86	305.68 ± 3.19	307.95 ± 4.16
Fiber proportion (%)					0.005^*	0.729^ns
Juvenile area	60.47 ± 5.02	61.43 ± 2.48	60.00 ± 6.54	60.63 ± 0.73
Mature area	66.19 ± 4.12	69.05 ± 2.98	67.62 ± 2.97	67.62 ± 1.43
Vessel proportion (%)					0.009^*	0.380^ns
Juvenile area	9.52 ± 0.83	11.43 ± 1.43	9.52 ± 2.18	10.16 ± 1.10
Mature area	8.09 ± 1.65	8.09 ± 1.65	7.62 ± 0.83	7.93 ± 0.28
Ray parenchyma proportion (%)					0.074^ns	0.047^*
Juvenile area	23.33 ± 5.02	18.09 ± 0.83	22.86 ± 3.78	21.43 ± 2.90
Mature area	20.48 ± 0.83	17.14 ± 1.43	19.05 ± 1.65	18.89 ± 1.67
Axial parenchyma proportion (%)					0.016^*	0.370^ns
Juvenile area	6.66 ± 0.83	9.05 ± 1.65	7.62 ± 2.97	7.78 ± 1.20
Mature area	5.24 ± 1.65	5.71 ± 0.00	5.71 ± 1.43	5.55 ± 0.27

Significantly different at p < 0.05.
: not significantly different.