Table 2 Effects of N addition treatments on soil C:N:P stoichiometry in August, 2013.

From: Changes in C:N:P stoichiometry modify N and P conservation strategies of a desert steppe species Glycyrrhiza uralensis

Treatments

Organic C (g kg−1)

Total N (g kg−1)

Total P (g kg−1)

C:N ratio

C:P ratio

N:P ratio

N0

8.56 ± 0.15 a

0.78 ± 0.05 a

0.62 ± 0.05 a

11.05 ± 0.80 ab

13.94 ± 0.68 ac

1.28 ± 0.13 a

N2.5

10.24 ± 0.49 b

0.83 ± 0.05 a

0.64 ± 0.02 a

12.48 ± 1.26 a

15.91 ± 0.86 ab

1.29 ± 0.07 a

N5

10.55 ± 0.46 b

0.88 ± 0.05 ab

0.62 ± 0.01 a

12.08 ± 0.86 ac

16.90 ± 0.86 b

1.41 ± 0.08 ab

N10

8.43 ± 0.32 a

0.98 ± 0.06 bc

0.61 ± 0.02 a

8.69 ± 0.65 b

13.74 ± 0.43 c

1.60 ± 0.11 b

N20

9.43 ± 0.51 ab

0.99 ± 0.03 bc

0.64 ± 0.02 a

9.57 ± 0.53 b

14.65 ± 0.63 ac

1.53 ± 0.05 ab

N40

10.04 ± 0.33 b

1.02 ± 0.01 c

0.64 ± 0.01 a

9.82 ± 0.45 bc

15.57 ± 0.44 abc

1.59 ± 0.03 b

  1. N0, N2.5, N5, N10, N20, and N40 represent N addition rate at 0, 2.5, 5, 10, 20, and 40 g m−2 a−1, respectively. Data are presented as means ± SE (n = 4). Different lowercase letters indicate significant differences between indices within N addition treatments (P < 0.05). The same lowercase letters indicate insignificant differences (P > 0.05).
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