Table 1 Correlations between the natural logarithm of soil GHG flux (CO2, N2O, and CH4) and soil parameters for different treatments over the experimental period.

From: Effects of nitrogen deposition and litter layer management on soil CO2, N2O, and CH4 emissions in a subtropical pine forestland

 

Treatment

T5cm

T10cm

T15cm

WFPS

NO3−-N

NH4+-N

ln CO2

CL

0.884***

0.885***

0.879***

0.072

0.034

−0.006

 

CR

0.839***

0.840***

0.839***

0.120

0.084

−0.134

 

NL

0.832***

0.846***

0.846***

0.079

−0.198**

−0.069

 

NR

0.843***

0.845***

0.844***

0.122

−0.228**

−0.122

ln N2O

CL

0.288***

0.293***

0.296***

0.064

0.018

−0.013

 

CR

0.218**

0.218**

0.219**

−0.108

0.086

−0.150

 

NL

0.151*

0.165*

0.164*

0.075

0.186*

−0.148*

 

NR

0.266**

0.274***

0.268**

0.115

0.162*

−0.178*

ln CH4

CL

0.378***

0.384***

0.392***

0.050

0.092

−0.028

 

CR

−0.092

−0.094

−0.099

0.105

0.056

0.057

 

NL

0.198*

0.202*

0.200*

0.131

−0.074

0.113

 

NR

−0.128

−0.127

−0.135

0.151*

0.030

0.114

  1. CL, no N addition with litter retention; CR, no N addition with removed litter layer; NL, 40 kg N ha−1 yr−1 addition with litter retention; NR, 40 kg N ha−1 yr−1 addition and removed litter layer.
  2. T5cm, T5cm, T5cm, are soil temperature at 5, 10, 15 cm depth, respectively; WFPS, soil water-filled pore space WFPS.
  3. *P < 0.05, **P < 0.01, ***P < 0.001.
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