Table 3 Effects of N addition levels and methods on the microbial phospholipid fatty acids of soil planted with four tree species

 AM

Total PLFAs

13.88 ± 1.46

14.54 ± 2.36

12.35 ± 1.04

12.87 ± 0.60

13.22 ± 0.90

14.84 ± 1.13

Bacteria PLFAs

5.91 ± 0.60

6.18 ± 1.12

4.95 ± 0.98

5.46 ± 0.36

5.72 ± 0.53

6.56 ± 0.51

Fungal

1.25 ± 0.14

1.24 ± 0.32

0.99 ± 0.06

1.01 ± 0.06

1.27 ± 0.06

1.34 ± 0.07

AMF

0.21 ± 0.04b

0.27 ± 0.03ab

0.24 ± 0.02ab

0.21 ± 0.03b

0.23 ± 0.03b

0.32 ± 0.03a

 OP

Total PLFAs

11.20 ± 0.80

12.98 ± 0.47

11.93 ± 1.18

11.42 ± 1.10

12.92 ± 1.41

11.64 ± 1.80

Bacteria PLFAs

4.48 ± 0.35

5.33 ± 0.21

5.01 ± 0.51

4.63 ± 0.57

5.68 ± 0.80

5.66 ± 0.84

Fungal

0.98 ± 0.15

1.03 ± 0.03

0.84 ± 0.12

0.79 ± 0.10

1.02 ± 0.04

0.98 ± 0.20

AMF

0.28 ± 0.04ab

0.32 ± 0.02ab

0.33 ± 0.03ab

0.24 ± 0.05b

0.32 ± 0.02ab

0.36 ± 0.05a

 SS

Total PLFAs

11.24 ± 0.70

14.01 ± 2.10

13.26 ± 1.10

9.40 ± 1.88

11.26 ± 0.44

11.19 ± 2.04

Bacteria PLFAs

4.46 ± 0.33

5.66 ± 1.11

5.43 ± 0.47

3.62 ± 0.78

4.78 ± 0.20

4.79 ± 0.94

Fungal

0.99 ± 0.14

1.25 ± 0.18

1.07 ± 0.32

0.80 ± 0.27

0.90 ± 0.14

0.80 ± 0.22

AMF

0.22 ± 0.01ab

0.28 ± 0.05a

0.27 ± 0.01a

0.18 ± 0.03b

0.25 ± 0.02ab

0.29 ± 0.04a

 PM

Total PLFAs

11.55 ± 0.60

10.33 ± 1.50

12.29 ± 0.60

9.36 ± 1.44

10.81 ± 1.35

12.26 ± 0.94

Bacteria PLFAs

4.79 ± 0.34

4.17 ± 0.69

4.98 ± 0.49

3.61 ± 0.50

4.68 ± 0.68

5.03 ± 0.57

Fungal

0.83 ± 0.06

0.76 ± 0.09

0.96 ± 0.13

0.71 ± 0.26

0.76 ± 0.08

1.05 ± 0.20

AMF

0.20 ± 0.02bc

0.19 ± 0.03bc

0.26 ± 0.05 ab

0.16 ± 0.01c

0.22 ± 0.04bc

0.29 ± 0.05a

 AM

Total PLFAs

15.85 ± 0.52b

16.23 ± 1.56b

13.66 ± 2.35c

13.66 ± 0.53c

15.04 ± 0.73c

16.98 ± 0.59a

Bacteria PLFAs

6.78 ± 0.22

7.22 ± 0.81

5.80 ± 1.13

5.88 ± 0.22b

6.45 ± 0.34b

7.39 ± 0.27a

Fungal

1.35 ± 0.10a

1.19 ± 0.13ab

1.11 ± 0.20ab

0.96 ± 0.07b

1.17 ± 0.10ab

1.39 ± 0.09a

AMF

0.21 ± 0.01c

0.28 ± 0.02ab

0.28 ± 0.05ab

0.21 ± 0.00c

0.24 ± 0.02bc

0.34 ± 0.02a

 OP

Total PLFAs

12.93 ± 0.80b

13.45 ± 1.07b

15.92 ± 1.44ab

12.45 ± 1.19b

17.65 ± 0.84a

17.91 ± 2.47a

Bacteria PLFAs

5.36 ± 0.33bc

5.73 ± 0.54ab

6.90 ± 0.67ab

4.99 ± 0.64c

7.39 ± 0.55a

7.51 ± 0.99a

Fungal

1.03 ± 0.03bc

0.92 ± 0.06c

1.14 ± 0.12ab

0.82 ± 0.09c

1.38 ± 0.05ab

1.56 ± 0.35a

AMF

0.28 ± 0.b

0.36 ± 0.02a

0.41 ± 0.01a

0.24 ± 0.03b

0.39 ± 0.01a

0.41 ± 0.05a

 SS

Total PLFAs

13.57 ± 2.30

14.64 ± 1.62

14.16 ± 2.36

10.85 ± 2.25

12.02 ± 0.30

13.74 ± 2.26

Bacteria PLFAs

5.25 ± 0.75

5.99 ± 0.72

5.89 ± 1.01

4.32 ± 0.80

5.12 ± 0.24

5.95 ± 0.88

Fungal

1.42 ± 0.87

1.12 ± 0.29

1.08 ± 0.35

0.77 ± 0.37

0.89 ± 0.07

0.95 ± 0.22

AMF

0.25 ± 0.02c

0.33 ± 0.03ab

0.34 ± 0.06ab

0.22 ± 0.05c

0.25 ± 0.00bc

0.39 ± 0.06a

 PM

Total PLFAs

12.55 ± 0.32ab

11.96 ± 1.33b

10.99 ± 1.07b

12.81 ± 0.09ab

13.61 ± 1.29ab

15.01 ± 1.12a

Bacteria PLFAs

5.15 ± 0.47b

5.00 ± 0.36b

4.66 ± 0.65b

5.54 ± 0.07b

6.00 ± 0.55ab

6.97 ± 0.70a

Fungal

0.88 ± 0.18

0.76 ± 0.09

0.76 ± 0.08

0.89 ± 0.07

0.92 ± 0.09

1.03 ± 0.16

AMF

0.19 ± 0.01c

0.21 ± 0.01bc

0.25 ± 0.04ab

0.26 ± 0.02ab

0.24 ± 0.04bc

0.31 ± 0.01a