Table 1.

Differences in total biomass, growth indices, inorganic and organic N net uptake capacity, and N metabolite levels between single grown seedlings of Fagus sylvatica, Quercus robur, Pinus sylvestris, Prunus serotina, and Robinia pseudoacacia.

	Biomass and growth indices				N net uptake capacity				N metabolites
									Total soluble amino		Total soluble
									acid-N		protein-N
Total	Root:shoot	RGR	SLA	SRL	${\mathrm{N}\mathrm{H}}_{\mathrm{4}}^{\mathrm{+}}$	${\mathrm{N}\mathrm{O}}_{\mathrm{3}}^{\mathrm{-}}$	Gln-N	Arg-N	Leaves	Fine	Leaves	Fine
biomass	ratio									roots		roots
Prunus >	Pinus >	Prunus,	Robinia >	Robinia >	n.s.	n.s.	Fagus,	Fagus,	Robinia >	Prunus,	Robinia,	Robinia >
Robinia >	Quercus >	Robinia >	Fagus >	Fagus,			Pinus >	Quercus,	Prunus >	Robinia >	Fagus,	Fagus,
Quercus >	Prunus >	Fagus,	Quercus >	Quercus,			Prunus,	Pinus >	Fagus,	Quercus,	Pinus >	Quercus,
Fagus,	Fagus >	Quercus,	Prunus	Pinus,			Robinia	Prunus,	Quercus,	Pinus	Prunus	Pinus,
Pinus	Robinia	Pinus		Prunus				Robinia	Pinus			Prunus

Species A > species B, seedlings of species A had significantly higher values than seedlings of species B; n.s., no significant differences between species. Total biomass (g), root:shoot ratio, ratio of belowground biomass to aboveground biomass; RGR, relative growth rate (g dw g^-1 dw d^-1); SLA, specific leaf area (cm² g^-1 dw); SRL, specific root length (cm g^-1 dw); N net uptake capacity (nmol N g^-1 fw h^-1); ${\mathit{N}\mathit{H}}_{\mathit{4}}^{\mathit{+}}$, ammonium; ${\mathit{N}\mathit{O}}_{\mathit{3}}^{\mathit{-}}$, nitrate; Gln-N, glutamine; Arg-N, arginine; total soluble amino acid-N (mg amino acid-N g^-1 dw); total soluble protein-N (mg protein-N g^-1 dw).