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Table III
Mean and standard deviation (sd) for diameter at breast height (DBH, mm), tree height (H, m), stem volume (V, m3) and wood density (WD, g cm−3) in spacing 1, 2 and 3 (current stand density of 2000, 2000–2500 and 4000 trees ha−1, respectively) and for all spacings. Different letters indicate differences among origin groups (OG) within each spacing, Tukey (p < 0.05).
| DBH | H | V | WD | ||
|---|---|---|---|---|---|
| OG | Mean ± sd | Mean ± sd | Mean ± sd | Mean ± sd | |
| Spacing 1 | Northern | 140 ± 26a | 11.9 ± 7a | 0.10 ± 0.04a | 0.386 ± 0.03a |
| Central | 137 ± 17a | 12.9 ± 9b | 0.11 ± 0.02a | 0.372 ± 0.03ab | |
| Southern | 135 ± 27a | 11.7 ± 7a | 0.09 ± 0.04a | 0.360 ± 0.02b | |
| All | 137 ± 23 | 12.2 ± 9 | 0.10 ± 0.03 | 0.373 ± 0.02 | |
| Spacing 2 | Northern | 133 ± 21a | 11.2 ± 8a | 0.09 ± 0.03a | 0.385 ± 0.03a |
| Central | 141 ± 25a | 12.6 ± 7b | 0.11 ± 0.04a | 0.386 ± 0.02a | |
| Southern | 135 ± 23a | 11.9 ± 7ab | 0.09 ± 0.03a | 0.369 ± 0.02a | |
| All | 136 ± 22 | 11.9 ± 9 | 0.10 ± 0.03 | 0.380 ± 0.02 | |
| Spacing 3 | Northern | 121 ± 36a | 12.5 ± 11a | 0.09 ± 0.05a | 0.368 ± 0.02a |
| Central | 112 ± 10a | 13.3 ± 6a | 0.07 ± 0.01a | 0.376 ± 0.01a | |
| Southern | 113 ± 21a | 12.7 ± 9a | 0.07 ± 0.03a | 0.360 ± 0.03a | |
| All | 115 ± 25 | 12.8 ± 9 | 0.08 ± 0.04 | 0.368 ± 0.02 | |
| All spacing | Northern | 131 ± 29a | 11.9 ± 10a | 0.09 ± 0.04a | 0.380 ± 0.03a |
| Central | 130 ± 22a | 12.9 ± 8b | 0.09 ± 0.03a | 0.378 ± 0.02a | |
| Southern | 128 ± 25a | 12.1 ± 8a | 0.09 ± 0.03a | 0.363 ± 0.02b |