|
Treatment
|
5-cm soil temperature
|
5-cm soil water content
|
5-cm soil temperature and water content
|
|---|
|
Fitting equation (y = a × eb × T)
|
Q10
|
Fitting equation (y = cM2 + dM + e)
|
Fitting equation (y = f × eg × T × Mh)
|
|---|
|
a
|
b
|
R
2
|
a
|
b
|
c
|
R
2
|
a
|
b
|
c
|
R
2
|
|---|
|
UTCK
|
0.69
|
0.06
|
0.95**
|
1.90
|
0.03
|
−1.59
|
21.02
|
0.11
|
1.96
|
0.06
|
−0.33
|
0.96**
|
|
UT4.0
|
0.62
|
0.07
|
0.94**
|
1.99
|
0.03
|
−1.53
|
20.51
|
0.09
|
2.30
|
0.07
|
−0.41
|
0.96**
|
|
UT3.25
|
0.51
|
0.07
|
0.94**
|
2.10
|
0.03
|
−1.66
|
21.81
|
0.11
|
1.46
|
0.07
|
−0.33
|
0.95**
|
|
UT2.5
|
0.42
|
0.08
|
0.91**
|
2.27
|
0.04
|
−1.82
|
23.69
|
0.11
|
1.58
|
0.08
|
−0.41
|
0.92**
|
|
TCK
|
0.47
|
0.07
|
0.86**
|
1.93
|
0.10
|
−4.57
|
54.75
|
0.23
|
1.27
|
0.07
|
−0.31
|
0.87**
|
|
T4.0
|
0.37
|
0.08
|
0.94**
|
2.16
|
0.11
|
−5.34
|
63.40
|
0.28*
|
0.60
|
0.08
|
−0.15
|
0.94**
|
|
T3.25
|
0.38
|
0.07
|
0.92**
|
1.97
|
0.09
|
−4.17
|
50.03
|
0.28*
|
1.98
|
0.07
|
−0.52
|
0.93**
|
|
T2.5
|
0.28
|
0.08
|
0.83**
|
2.25
|
0.10
|
−4.54
|
54.03
|
0.29*
|
0.55
|
0.08
|
−0.21
|
0.83**
|
- In the equations, y represents the soil respiration rate (μmol∙m−2·s−1), T represents 5-cm soil temperature (°C), M represents 5-cm soil moisture content, and a, b, c, d, e, f, g, and h are constants. UTCK, UT4.0, UT3.25, and UT2.5 indicate control, pH 4.0, pH 3.25, and pH 2.5 simulated acid rain in the untrenched plots, respectively; TCK, T4.0, T3.25, and T2.5 indicate the control, pH 4.0, pH 3.25, and pH 2.5 simulated acid rain in the trenched plots, respectively. * significant correlation (P < 0.05); ** highly significant correlation (P < 0.01)
