Table 1. The average value of the distribution of vascular bundles, percentage of fiber sheath, density, and tensile strength of Gigantochloa apus bamboo strips with nodes and without nodes (internode) and based on layers (outer, middle, and inner)

Section	Radial segment	Distribution of vascular bundles (∑ number of VB/mm²)	Percentage of fiber sheaths (%)	Density (g/cm³)	Tensile strength (kg/cm²)
Internode	Outer	8.33 ± 1.00^a	51.83 ± 5.41^a	0.85 ± 0.04^a	3,284.14 ± 476.30^a
	Middle	4.89 ± 0.93^b	44.71 ± 5.47^b	0.73 ± 0.05^b	2,622.45 ± 179.34^b
	Inner	4.22 ± 0.97^b	37.51 ± 6.24^c	0.62 ± 0.04^c	1,626.85 ± 421.03^c
	Average	5.81 ± 2.06^A	44.68 ± 8.11^A	0.73 ± 0.10^A	2,511.15 ± 784.89^A
Node	Outer	8.11 ± 0.78^a	44.11 ± 4.16^b	0.82 ± 0.03^a	1,777.68 ± 196.86^c
	Middle	3.44 ± 0.53^c	31.93 ± 3.42^d	0.60 ± 0.05^c	875.83 ± 116.59^d
	Inner	2.56 ± 0.53^d	23.12 ± 1.84^e	0.45 ± 0.03^d	258.28 ± 118.24^e
	Average	4.70 ± 2.55^B	33.05 ± 9.32^B	0.62 ± 0.16^B	970.60 ± 654.97^B

Statistical groupings of vertical and horizontal segments are shown in capital and lowercase letters, respectively.
Mean values with different letters in the same column are significantly different at p < 0.05.