. 2015 Apr 30;6:302. doi: 10.3389/fpls.2015.00302

Table 2.

Biomass and leaf parameters of beech and sycamore seedlings with high/low soil N supply (mean ± SD).

	High N supply				Low N supply
	BB-B	BM-B	BM-M	MM-M	BB-B	BM-B	BM-M	MM-M
R:S_m	0.832 ± 0.109^a	0.891 ± 0.141^a	0.780 ± 0.195^a	0.874 ± 0.204^a	0.906 ± 0.171^a	0.873 ± 0.198^a	0.865 ± 0.173^a	0.813 ± 0.196^a
RGR (mg g^-1 d^-1)	6.232 ± 5.179^b	3.325 ± 6.559^ab	1.841 ± 6.303^a	12.685 ± 4.525^c	4.587 ± 7.278^b	0.866 ± 5.721^a	1.912 ± 6.559^ab	10.581 ± 5.724^c
NAR (g m² d^-1)	0.178 ± 0.148^b	0.095 ± 0.148^ab	0.101 ± 0.26^a	0.417 ± 0.153^c	0.148 ± 0.235^b	0.027 ± 0.175^a	0.080 ± 0.269^ab	0.395 ± 0.214^c
LNP (g g(N_m)^-1 d^-1)	1.667 ± 1.700^b	0.847 ± 0.995^ab	1.349 ± 2.751^a	4.932 ± 1.189^c	0.943 ± 0.985^b	0.014 ± 0.041^a	0.800 ± 1.936^ab	4.574 ± 2.051^c
LMR (g g^-1)	0.170 ± 0.034^b	0.180 ± 0.036^b	0.106 ± 0.028^a	0.105 ± 0.021^a	0.162 ± 0.023^b	0.168 ± 0.021^b	0.102 ± 0.020^a	0.097 ± 0.020^a
LAR (cm² g^-1)	34.937 ± 5.569^a	35.091 ± 23.746^a	30.644 ± 9.375^a∗	29.644 ± 6.925^a	30.913 ± 5.380^a	32.604 ± 6.806^a	24.245 ± 6.106^a∗	26.807 ± 9.093^a
SLA (m² g^-1)	0.318 ± 0.027^a	0.334 ± 0.036^a	0.421 ± 0.127^b	0.399 ± 0.083^b	0.326 ± 0.032^a	0.327 ± 0.035^a	0.375 ± 0.095^ab	0.404 ± 0.036^b
N_a (g m^-2)	1.190 ± 0.104^b∗	1.201 ± 0.077^b∗	0.809 ± 0.025^a∗	1.057 ± 0.158^b	1.594 ± 0.112^c∗	1.408 ± 0.120^c∗	1.341 ± 0.045^b∗	1.000 ± 0.105^a

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. BB-B: beech grown in intra-specific competition, BM-B: beech grown in inter-specific competition with sycamore maple, BM-M: sycamore maple grown in inter-specific competition with beech, MM-M: sycamore maple grown in intra-specific competition. Different small letters indicate significant differences between the competition regimes (i.e., BB-B, BM-B, BM-M, MM-M) within one soil N supply treatment (P ≤ 0.05). Asterisks indicate significant differences between high and low soil N supply within one competition regime (P ≤ 0.05).