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. 2009 Jun 18;4(6):e5964. doi: 10.1371/journal.pone.0005964

Table 2. Leaf litter quality and root biomass of tree species (mean±SE) and F and P values from ANOVA.

	Litter N (%)	Litter C (%)	Litter C∶N	Litter cellulose (%)	Litter lignin (%)	Litter lignin∶N	Fine root biomass (g m⁻²)^*	Coarse root biomass (g m⁻²)^*
Aspen	0.84±0.08^a ^†	49.4±0.4^a	60.4±5.2^a	42.1±3.0^a	20.2±2.2^a	24.1±1.2^a	321±47	422±134
Pine	0.47±0.03^b	52.0±0.3^b	112.1±8.3^b	59.0±1.0^b	33.8±0.5^b	73.2±5.7^b	215±25	232±87
Spruce	0.41±0.01^b	48.7±0.1^a	118.3±4.2^b	41.1±1.1^a	19.2±0.7^a	46.6±1.7^c	249±28	319±62
Species	F_{2, 11} = 19.0	F_{2, 11} = 24.1	F_{2, 11} = 23.9	F_{2, 11} = 20.7	F_{2, 11} = 33.9	F_{2, 11} = 36.9	F_{2, 35} = 1.8	F_{2, 35} = 2.1
	P = 0.003	P<0.001	P = 0.001	P = 0.002	P<0.001	P<0.001	P = 0.204	P = 0.169
Block	F_{3, 11} = 0.7	F_{3, 11} = 0.9	F_{3, 11} = 0.7	F_{3, 11} = 0.3	F_{3, 11} = 0.8	F_{3, 11} = 0.3	F_{3, 35} = 0.2	F_{3, 35} = 0.8
	P = 0.585	P = 0.381	P = 0.587	P = 0.845	P = 0.532	P = 0.847	P = 0.900	P = 0.539
S×B	NA^§	NA	NA	NA	NA	NA	F_{6, 35} = 1.8	F_{6, 35} = 1.8
							P = 0.172	P = 0.184

^*

Fine roots were<1 mm diameter; coarse roots were >1 mm diameter.

^§

Not applicable since there was only one litter sample per stand.

^†

Different letters denote significant differences among tree species (P = 0.05).