Table 1 Soil chemical properties at three soil depths in the four forest management treatments (mean value ± standard error; n = 3). Significant differences among different soil layers subjected to the same treatments are identified with A, B, and C (p < 0.05). Significant differences among different treatments of the same soil layer are identified with a, b, c, and d (p < 0.05), based on the analysis of variance.

From: Labile organic carbon pools and enzyme activities of Pinus massoniana plantation soil as affected by understory vegetation removal and thinning

Treat- ments

Soil depth (cm)

Soil pH

TN

TP

TK

AP

AK

NO3−–N

NH4+–N

CK

0–10

5.85 ± 0.02 Aa

1.65 ± 0.01 Aa

0.21 ± 0.01 Aa

17.05 ± 0.12 Aa

0.84 ± 0.10 a

184.68 ± 2.19 Aa

17.79 ± 0.89 Aa

43.00 ± 3.51 Aa

10–20

5.92 ± 0.06 Ba

1.15 ± 0.01 Ba

0.18 ± 0.01 Ba

16.76 ± 0.13 Ba

0.99 ± 0.17 a

145.83 ± 2.80 Ba

11.26 ± 0.99 Ba

37.34 ± 3.48 Ba

20–30

6.07 ± 0.05 Ca

0.97 ± 0.01 Ca

0.17 ± 0.01 Ba

17.13 ± 0.10 Ba

0.98 ± 0.17 a

136.58 ± 0.47 Ca

5.40 ± 0.0.37 Ca

24.66 ± 0.56 Ca

SC

0–10

6.02 ± 0.05 Aa

1.57 ± 0.02 Ab

0.20 ± 0.01 Aa

18.21 ± 0.15 Ab

1.23 ± 0.17Aa

146.45 ± 2.04 Ab

11.65 ± 0.22 Ab

45.66 ± 0.69 Aa

10–20

6.16 ± 0.03 Ba

1.16 ± 0.01 Ba

0.19 ± 0.01 Ba

18.08 ± 0.25 Bb

2.35 ± 0.29 Bb

126.18 ± 1.28 Bb

4.48 ± 0.14 Bb

18.96 ± 0.23 Bb

20–30

6.33 ± 0.03 Ca

0.90 ± 0.01 Cb

0.18 ± 0.01 Ca

19.52 ± 0.19 Ca

1.57 ± 0.4 ABab

110.43 ± 2.47 Cb

2.75 ± 0.34 Cb

12.76 ± 1.28 Cb

LIT

0–10

6.17 ± 0.02 Aa

1.37 ± 0.04 Ac

0.19 ± 0.01 Aa

16.54 ± 0.21 Ac

2.11 ± 0.39 b

140.60 ± 3.29 Acb

9.73 ± 0.42 A c

50.69 ± 2.91 Ab

10–20

6.25 ± 0.03 Ba

1.04 ± 0.02 Bb

0.17 ± 0.01 Ba

17.14 ± 0.08 Ba

1.46 ± 0.92 ac

127.40 ± 2.50 Bb

2.57 ± 0.10 Bc

14.79 ± 0.47 Bc

20–30

6.48 ± 0.02 Ca

0.85 ± 0.0 1 Cc

0.17 ± 0.01 Ba

17.70 ± 0.24 Aa

2.51 ± 0.61 b

126.25 ± 3.29 Aa

2.45 ± 0.13 Bb

10.99 ± 0.28 Cb

HIT

0–10

5.97 ± 0.05 Aa

1.49 ± 0.01 Ad

0.19 ± 0.01 Aa

16.43 ± 0.16 Acd

0.82 ± 0.70 Aa

130.78 ± 0.52 Ac

5.35 ± 0.19 Ad

35.79 ± 3.29 Ac

10–20

6.07 ± 0.03 Ba

1.09 ± 0.02 Bc

0.17 ± 0.01 Ba

15.83 ± 0.34 Bc

1.09 ± 0.10 ABad

82.90 ± 1.60 Bc

4.90 ± 0.58 ABb

34.51 ± 2.41 Aa

20–30

6.20 ± 0.04 Ca

0.96 ± 0.01 Ca

0.18 ± 0.01 Ca

16.58 ± 0.05 Ca

1.91 ± 0.90 Bab

71.68 ± 1.57 Cc

3.50 ± 1.56 Bb

29.25 ± 1.50 Bc

Back to article page