TC

TN

P

K

Cu

Zn

g·kg⁻¹

mg·kg⁻¹

g·kg⁻¹

mg·kg⁻¹

Control

Control

6.69 a

0.618 a

13.7 ab

0.165 a

0.755 b

1.48 bc

Control

Biochar

9.07 def

0.648 ab

12.8 a

0.163 a

0.76 b

1.62 c

Control

Lignite

9.61 efg

0.633 ab

14.5 ab

0.184 a

0.683 b

1.64 c

Fertilizer

Control

7.07 ab

0.99 cd

14.3 ab

0.158 a

0.764 b

1.14 abc

Fertilizer

Biochar

7.73 bc

1.05 d

15.4 ab

0.167 a

0.7 b

0.85 ab

Fertilizer

Lignite

8.15 cd

0.886 cd

16.4 b

0.165 a

0.477 a

0.706 a

Poultry litter

Control

8.86 de

0.829 c

64.2 c

0.424 c

5.74 c

11 d

Poultry litter

Biochar

10.1 fg

0.794 bc

66.2 c

0.347 bc

4.27 c

12.1 d

Poultry litter

Lignite

10.4 g

0.791 bc

58.2 c

0.331 b

4.47 c

10.4 d

Depth

0 - 15 cm

10.5 b

0.925 b

48.2 b

0.279 b

1.62 b

6.32 b

15 - 30 cm

6.95 a

0.677 a

11.6 a

0.168 a

1.05 a

0.983 a