Table 1 Comparison of soil organic carbon density in different grazing intensity

NG

LG

MG

HG

TOC

kg·^m-2

0-15

3.22(0.18)

aA

3.12(0.27)

aA

3.17(0.20)

aA

2.91(0.28)

aA

15-30

2.48(0.06)

aB

2.41(0.05)

aB

2.38(0.06)aB

2.31(0.03)aB

30-45

2.18(0.01)

aB

2.05(0.16)

aB

2.12(0.11)

aB

2.18(0.09)

aB

SIC

kg·^m-2

0-15

0.29(0.02)

aA

0.29(0.03)

aA

0.30(0.01)

aA

0.28(0.03)

aA

15-30

1.33(0.12)

aB

1.42(0.08)

aB

1.39(0.09)

aB

1.31(0.09)

aB

30-45

1.96(0.13)

aC

1.89(0.12)

aC

1.79(0.24) a C

1.92(0.17)

aC

POC

kg·^m-2

0-15

1.12(0.02) aA

1.09(0.01)aA

0.83(0.03)bA

0.68(0.04)cA

15-30

0.75(0.03) aB

0.72(0.03)

aB

0.58(0.02)

bB

0.53(0.04)

bB

30-45

0.47(0.09)

aC

0.46(0.09)

aC

0.48(0.09)

aB

0.48(0.02)

aB

LFOC

g·^m-2

0-15

373.26

(29.94)aA

363.29

(30.84)aA

203.61

(14.34)bA

120.78

(11.53)cA

15-30

173.27

(4.92)aB

214.01

(32.34)aB

95.85

(21.06)bB

75.99

(7.37)bB

30-45

69.67

(7.63)aC

65.95

(8.50)aC

51.52

(13.66)aB

65.58

(13.21)aB

ROC

g·^m-2

0-15

41.04

(1.25)aA

40.11

(1.43)aA

30.99

(2.71)bA

22.94

(1.72)cA

15-30

28.89

(2.14)aB

28.21

(2.12)aB

21.63

(1.41)bB

16.82

(1.68)bB

30-45

13.25

(1.20)aC

12.67

(1.22)aC

12.59

(0.68)aC

12.99

(1.85)aB