Table 4.

Results of a repeated-measures ANOVA for the effects of N compounds types on stem mass remaining.

D	AC(1 month)	AN(1 month)	AS(1 month)	AC(3 months)	AN(3 months)	AS(3 months)	AC(6 months)	AN(6 months)	AS(6 months)
0	0.081 ± 0.0005	0.081 ± 0.0005	0.081 ± 0.0005	0.073 ± 0.002	0.073 ± 0.002	0.073 ± 0.002	0.070 ± 0.0001	0.070 ± 0.0001	0.070 ± 0.0001
2	0.075 ± 0.002	0.077 ± 0.002	0.079 ± 0.001	0.069 ± 0.001	0.064 ± 0.005	0.069 ± 0.002	0.065 ± 0.002	0.057 ± 0.005	0.063 ± 0.0004
5	0.075 ± 0.003	0.075 ± 0.003	0.078 ± 0.002	0.071 ± 0.002	0.068 ± 0.005	0.069 ± 0.001	0.061 ± 0.002	0.057 ± 0.005	0.062 ± 0.002
10	0.078 ± 0.001a	0.073 ± 0.001b	0.076 ± 0.001ab	0.073 ± 0.004	0.068 ± 0.005	0.067 ± 0.004	0.064 ± 0.002	0.062 ± 0.001	0.062 ± 0.003
20	0.075 ± 0.002	0.074 ± 0.001	0.073 ± 0.004	0.069 ± 0.0004a	0.062 ± 0.001c	0.066 ± 0.001b	0.061 ± 0.001	0.060 ± 0.003	0.061 ± 0.002
50	0.074 ± 0.005	0.077 ± 0.004	0.068 ± 0.003	0.070 ± 0.005	0.062 ± 0.001	0.063 ± 0.005	0.059 ± 0.001	0.050 ± 0.003	0.058 ± 0.005

Letters indicate the difference in litter decomposition of plants with different nitrogen type under various nitrogen addition dosage. 1 month, 3 months and 6 months represent samples taken one month, three months and six months after decomposition respectively.

Bold characters indicate significant differences.