Table 3 Analysis of the variance of the effects of different treatments, soil layers, and time after organic mulching on soil organic carbon fractions in the rhizosphere and bulk soil

Time

2

9.73***

10.69***

114.48***

82.63***

7.28**

1.41

96.71***

136.83***

Soil layer

1

10.40**

4.49*

25.49***

13.59***

83.73***

74.29***

29.61***

17.31***

Treatment

3

0.48

0.15

5.06**

4.12*

1.27

0.83

0.30

0.37

Time × Soil layer

2

5.99**

3.01

0.55

0.09

0.75

1.65

0.04

2.67

Time ×Treatment

6

1.02

0.86

0.92

2.11

2.94*

1.74

0.17

0.29

Soil layer × Treatment

3

0.97

0.62

1.78

0.87

3.62*

0.20

2.22

1.18

Time × Soil layer × Treatment

6

1.08

0.44

0.98

0.89

0.73

0.60

1.36

0.66