Table 2 Values (means ± standard deviations) of size and abundance variables of cork porosity in the cross-sections of cork samples: area (A), width (W) and length (L) grouped according to the highest sampling height
From: Variation of cork porosity along the stem in harvested cork oak (Quercus suber L.) trees
Porosity variables | Fixed stem height, h (m) | ||||
|---|---|---|---|---|---|
0.30 | 1.30 | 2.30 | 3.30 | 4.30 | |
Cork sampling maximum height (1.30 m) (n = 28) | |||||
Amax (mm2) | 39.0 ± 21.59 | 30.3 ± 16.86 | |||
Wmax (mm) | 7.4 ± 3.24 | 6.0 ± 2.80 | |||
Lmax (mm) | 16.6 ± 4.60 | 16.1 ± 5.59 | |||
CP (%) | 13.3 ± 5.53 | 10.3 ± 3.32 | |||
NP (n/100 cm2) | 28 ± 11 | 27 ± 9 | |||
Cork sampling maximum height (2.30 m) (n = 34) | |||||
Amax (mm2) | 49.2 ± 22.31 | 35.4 ± 19.99 | 26.9 ± 16.80 | ||
Wmax (mm) | 8.2 ± 4.70 | 8.1 ± 4.86 | 5.9 ± 1.31 | ||
Lmax (mm) | 19.5 ± 7.06 | 17.9 ± 6.11 | 14.3 ± 5.67 | ||
CP (%) | 12.4 ± 3.15 | 13.1 ± 5.72 | 9.9 ± 4.28 | ||
NP (n/100 cm2) | 26 ± 8 | 28 ± 10 | 25 ± 6 | ||
Cork sampling maximum height (3.30 m) (n = 12) | |||||
Amax (mm2) | 64.9 ± 42.02 | 44.1 ± 25.12 | 31.4 ± 24.13 | 34.9 ± 20.72 | |
Wmax (mm) | 7.0 ± 4.53 | 7.9 ± 4.51 | 5.5 ± 3.54 | 7.7 ± 3.11 | |
Lmax (mm) | 17.9 ± 6.65 | 18.0 ± 3.97 | 15.9 ± 5.84 | 18.8 ± 4.22 | |
CP (%) | 14.9 ± 9.49 | 13.3 ± 4.88 | 11.6 ± 6.25 | 11.1 ± 3.82 | |
NP (n/100 cm2) | 21 ± 11 | 26 ± 8 | 25 ± 10 | 22 ± 6 | |
Cork sampling maximum height (4.30 m) (n = 2) | |||||
Amax (mm2) | 95.0 | 64.8 | 44.1 | 33.0 | 30.6 |
Wmax (mm) | 13.1 | 8.4 | 7.6 | 4.8 | 7.3 |
Lmax (mm) | 25.1 | 27.6 | 23.7 | 10.3 | 18.1 |
CP (%) | 10.2 | 8.9 | 10.3 | 6.2 | 8.8 |
NP (n/100 cm2) | 20 | 18 | 21 | 25 | 19 |