Mean stem dry weight, root dry weight, root volume, and root:shoot ratio are indicated for each soil treatment, each maple cultivar, and each year.
| Biomass measure | ||||
|---|---|---|---|---|
| Stem dry wt (g) | Root dry wt (g) | Root volume (cm3) | Root:shoot (ratio) | |
| Soil treatmentz | ||||
| MODERATE-density (n = 14) | 23.7 ± 2.4 a | 45.7 ± 6.4 a | 100.1 ± 15.2 a | 1.3 ± 0.13 b |
| HIGH-density (n = 28) | 15.2 ± 1.2 b | 36.7 ± 3.8 a | 78.6 ± 9.6 a | 1.5 ± 0.11 a |
| Speciesy | ||||
| ‘Armstrong’ Freeman maple (n = 21) | 15.3 ± 1.9 b | 32.7 ± 4.5 a | 64.5 ± 10.1 b | 1.3 ± 0.10 b |
| ‘Brandywine’ red maple (n = 21) | 20.8 ± 1.4 a | 46.7 ± 4.5 a | 107.0 ± 11.2 a | 1.5 ± 0.14 a |
| Yearx | ||||
| 2002 (n = 12) | 13.6 ± 1.9 b | 18.4 ± 2.6 b | 67.9 ± 12.8 b | 0.72 ± 0.04 c |
| 2003 (n = 18) | 19.0 ± 2.2 a | 43.5 ± 5.0 a | 108.3 ± 15.4 a | 1.49 ± 0.07 b |
| 2004 (n = 12) | 20.9 ± 1.9 a | 55.3 ± 3.9 a | 142.7 ± 10.6 a | 1.98 ± 0.11 a |
↵zMODERATE = mean bulk density of 1.64 g·cm−3 (n = 24), HIGH = mean bulk density for the three-year study of 1.77 g·cm−3 (n = 48).
↵ySpecies Acer × freemanii ‘Armstrong’, Armstrong Freeman maple, and Acer rubrum ‘Brandywine’, Brandywine red maple; means ± mean standard error followed by different letters indicate a significant difference between soil treatments, species, or year at P ≤ 0.05.
↵xYear study period was 2002, 2003, and 2004.