Table 1 Results of the two-way ANOVA for the effects of nitrogen addition and snowpack depth treatments and their interactions on the soil respiration during different stages of winter.

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

 

Early Winter

Deep Winter

Late Winter

Sources of deviation

df

F

P

df

F

P

df

F

P

N

3

39.23

<0.0001

3

265.83

<0.0001

3

20.878

<0.0001

Snowpack

3

692.53

<0.0001

4

169.04

<0.0001

4

4.711

<0.01

Interaction

9

21.92

<0.0001

12

12.17

<0.0001

12

25.45

<0.0001

  1. Abbreviation: N, nitrogen addition.
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