Table 1 Growth, biomass and nitrogen concentrations of Populus trichocarpa

Height increment (cm d⁻¹ )

0.83 ± 0.02

1.16 ± 0.03

<0.001

Stem diameter (mm)

5.35 ± 0.15

6.40 ± 0.14

<0.001

Biomass of stem (g plant⁻¹)

2.31 ± 0.09

4.06 ± 0.17

<0.001

Biomass of leaves (g plant⁻¹)

4.43 ± 0.24

7.17 ± 0.35

<0.001

Biomass of roots (g plant⁻¹)

1.45 ± 0.13

1.67 ± 0.24

0.215

Total biomass (g plant⁻¹)

8.49 ± 0.43

13.26 ± 0.64

<0.001

N in EZ (%)

2.03 ± 0.08

3.70 ± 0.15

<0.001

N in developing xylem (%)

0.55 ± 0.03

1.59 ± 0.08

<0.001

N in wood (%)

0.18 ± 0.02

0.42 ± 0.10

0.033

N in bark (%)

0.38 ± 0.06

1.03 ± 0.16

0.004