Table 1.

Two-way ANOVA analyses of growth indices, N uptake capacity and N pools in the fine roots of beech and sycamore maple seedlings.

	N supply ∗ competition	N supply	Competition
Growth indices
R:Sm	0.018	0.292	0.241
RGR (mg g-1 d-1)	0.600	0.101	<0.001
NAR (g m2 d-1)	0.211	0.658	<0.001
LNP (g g(Nm)-1 d-1)	0.212	0.058	<0.001
LMR (g g-1)	0.905	0.016	<0.001
LAR (cm2 g-1)	0.030	0.186	0.004
SLA (m2 g-1)	0.412	0.419	<0.001
Na (g m-2)	<0.001	<0.001	<0.001
N uptake capacity
Ammonium	<0.001	<0.001	<0.001
Nitrate	0.496	<0.001	<0.001
Arginine-N	<0.001	<0.001	<0.001
Glutamine-N	0.172	<0.001	<0.001
N pools
Total N	0.123	0.283	<0.001
Structural N	0.099	0.120	0.153
Total soluble protein-N	0.023	< 0.001	0.031
Total amino acid-N	0.226	<0.001	0.001
Nitrate-N	<0.001	<0.001	<0.001
Ammonium-N	0.494	0.004	<0.001

The effects of all parameters were separated by two factors (1) N supply and (2) competition regimes. R:S_m, root/shoot mass ratio; RGR, relative growth rate; NAR, net assimilation rate; LNP, leaf nitrogen productivity; LMR, leaf mass ratio; LAR, leaf area ratio; SLA, specific leaf area; N_a, nitrogen concentration per unit leaf area. Bold values indicate the significance level of 0.050.