Mean annual height growth, leaf area, and dry weight measurements for interactions between year by species and for species by soil treatment.
| Biomass measure | |||
|---|---|---|---|
| Height growth (cm·y−1) | Leaf area (cm2) | Leaf dw (g) | |
| Year by specieszy | |||
| 2002 (n = 21) | |||
| ‘Armstrong’ | 27.0 ± 3.8 a (a) | 1167.4 ± 85.2 b (a) | 9.2 ± 0.6 b (a) |
| ‘Brandywine’ | 30.1 ± 4.2 a [a] | 2150.9 ± 137.1 a [a] | 13.5 ± 0.9 a [a] |
| 2003 (n = 15) | |||
| ‘Armstrong’ | 27.3 ± 4.4 a (a) | 1429.2 ± 231.4 a (a) | 10.3 ± 1.5 a (a) |
| ‘Brandywine’ | 11.6 ± 2.5 b [b] | 1411.1 ± 105.9 a [b] | 9.0 ± 0.7 a [b] |
| 2004 (n = 6) | |||
| ‘Armstrong’ | 27.8 ± 5.7 a (a) | 1041.1 ± 88.3 a (a) | 8.0 ± 0.6 a (a) |
| ‘Brandywine’ | 6.1 ± 4.2 b [b] | 860.3 ± 50.6 a [c] | 6.5 ± 0.4 a [c] |
| Species by soil treatmentx | |||
| ‘Armstrong’ | |||
| MODERATE-density (n = 14) | 40.1 ± 4.3 a (a) | 1577.0 ± 241.0 a (a) | 11.8 ± 1.5 a (a) |
| HIGH-density (n = 28) | 20.8 ± 2.4 b [a] | 1075.8 ± 61.9 b [b] | 8.2 ± 0.4 b [b] |
| ‘Brandywine’ | |||
| MODERATE-density (n = 14) | 21.8 ± 4.7 a (b) | 1972.0 ± 224.2 a (a) | 12.3 ± 1.5 a (a) |
| HIGH-density (n = 28) | 19.2 ± 3.5 a [a] | 1567.5 ± 113.1 a [a] | 10.2 ± 0.6 a [a] |
↵zYear study period was 2002, 2003, and 2004.
↵ySpecies were 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 treatments, at P ≤ 0.05 (Tukey’s honestly significant difference test, HSD); values in parentheses indicate differences within a single species but between year or soil treatment, and means in brackets indicate differences within either a single year and between species, or a single species between soil treatments.
↵xMODERATE = mean bulk density of 1.64 g·cm−3 (n = 24), HIGH = mean bulk density of 1.77 g·cm−3 (n = 48) averaged across the three-year study.