Table 3 Temperature sensitivity (Q10), the reference respiration rate (R0) and regression models coefficients during the winter and the growing season.

From: Annual soil CO2 efflux in a cold temperate forest in northeastern China: effects of winter snowpack and artificial nitrogen deposition

Specified periods

 

Control

Low-N

Medium-N

High-N

Growing Season

Q 10

2.4 Aa

1.9 Abc

2.1 Aac

2.4 Aad

R 0

1.12 Ab

1.49 Aa

1.37 Aa

1.11 Ab

a

−0.15

0.16

−0.21

−0.25

b

0.16

0.08

0.20

0.06

c

0.10

0.06

0.11

0.11

Winter

Q 10

7.7 Ba

19.1 Bb

11.6 Bab

3.1 Bc

R 0

0.53 Ba

0.48 Ba

0.54 Ba

0.47 Ba

a

1.99

−0.50

−5.97

−6.61

b

3.84

−1.05

−9.75

−17.98

c

−4.02

0.46

10.61

34.25

  1. Regression models of soil CO2 efflux against soil temperature at the 5 cm depth for the specified periods. The regression models are of the form: Rs = (T)a × exp(b + c × T), where a, b and c are regression coefficients.
  2. Abbreviation: Letters within a column represent significant differences of Q10 and R0 between the growing season and winter (capital letters) and across different quantities of nitrogen addition (lower cases) at P < 0.05.
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