Table 1. Summary of two-way ANOVAs for biomass accumulation, biomass allocation, root morphology and soil oxidation-reduction potential at two water levels and three burial depths.

	n	Burial depth (B)			Water-level (W)			B × W
		F-values	P-values	df	F-values	P-values	df	F-values	P-values	df
Soil oxidation-reduction potential (mv)	5	16.4	<0.001	2	215.3	<0.001	1	6.5	0.005	2
Biomass accumulation (g dry wt plant−1)	5	29.8	<0.001	2	120.5	<0.001	1	11.0	<0.001	2
Leaf mass ratio (%)	5	6.5	0.005	2	78.4	<0.001	1	5.7	0.009	2
Stem mass ratio (%)	5	6.0	0.008	2	1.4	0.243	1	0.8	0.460	2
Rhizome mass ratio (%)	5	5.8	0.008	2	26.9	<0.001	1	0.5	0.689	2
Root mass ratio (%)	5	4.4	0.023	2	14.7	<0.001	1	2.3	0.125	2
Root diameter (mm)	5	6.2	0.007	2	76.5	<0.001	1	4.0	0.032	2
Mean root length (cm)	5	11.0	<0.001	2	81.6	<0.001	1	25.3	<0.001	2
Specific root length (cm dry wt mg−1)	5	33.4	<0.001	2	123.2	<0.001	1	42.5	<0.001	2