Table 1.

Means of stem fraction, specific absorption rate and specific leaf area of Polygonum cuspidatum and Chenopodium album

		P. cuspidatum			C. album
	Days	Low N	High N	Low N	High N
Stem fraction	12	0·274	0·277	0·286	0·261
	27	0·298 ± 0·089	0·200 ± 0·132	0·328 ± 0·014	0·271 ± 0·015
	42	0·352 ± 0·136	0·207 ± 0·004	0·384 ± 0·011	0·382 ± 0·009
	55	0·371 ± 0·154	0·259 ± 0·07	0·413 ± 0·017	0·512 ± 0·002
Specific absorption rate (gN g−1 d−1)	12	0·0060	0·0306	0·0069	0·1167
	27	0·0037 ± 0·0007	0·0300 ± 0·0052	0·0040 ± 0·0006	0·0549 ± 0·0018
	42	0·0016 ± 0·0008	0·0270 ± 0·0026	0·0020 ± 0·0007	0·0260 ± 0·0017
	55	0·0012 ± 0·0005	0·0269 ± 0·0055	0·0006 ± 0·0007	0·0204 ± 0·0004
SLA (m2 g−1)	12	0·0343	0·0397	0·0314	0·0414
	27	0·0312 ± 0·0009	0·0387 ± 0·0011	0·0316 ± 0·0021	0·0378 ± 0·0045
	42	0·0287 ± 0·0018	0·0348 ± 0·0009	0·0336 ± 0·0021	0·0302 ± 0·0008
	55	0·0294 ± 0·0012	0·0304 ± 0·0008	0·0329 ± 0·0022	0·0264 ± 0·0008