. 2017 Apr 7;12(4):e0174841. doi: 10.1371/journal.pone.0174841

Table 6. Effects of nitrogen treatments on root activity at different stages (TTC reduction μg g^-1 h^-1).

Nitrogen treatments	V4			R2			R4
Nitrogen treatments	2013	2014	Mean	2013	2014	Mean	2013	2014	Mean
N₀	78.3c	72.5d	75.4d	129.8c	123.3c	126.6d	105.4	99.2c	102.3b
N₂₅	80.3c	79.6c	80.0c	131.7bc	127.8c	129.8c	110.0	102.3bc	106.2b
N₅₀	96.6a	94.1a	95.4a	148.4a	143.1a	145.8a	125.5	113.2a	119.4a
N₇₅	83.8b	84.2b	84.0b	134.5b	133.2b	133.9b	111.4	108.4ab	109.9b
ANOVA Effect
Nitrogen (N)	^**	^***	^***	^**	^***	^**	ns	^*	^**
Year (Y)	^**			^**			^*
N×Y	^*			ns			ns

Means with same letter are not significantly different (P<0.05) using LSD Test.

***, **, *, and ns denote significance at 0.001, 0.01, 0.05 and not significant (P>0.05), respectively.

Table 6. Effects of nitrogen treatments on root activity at different stages (TTC reduction μg g-1 h-1).