Table 2 Effects of different vegetation types on soil nutrients in 0–60 cm newly cultivated land in loess region.

From: Effects of alfalfa and oatgrass on soil nutrients in newly cultivated land on the Loess Plateau, China

Species

Depth

(cm)

SOM

(g.kg−1)

TN

(g.kg−1)

TP

(g.kg−1)

TK

(g.kg−1)

AN

(mg.kg−1)

AK

(mg.kg−1)

AP

(mg.kg−1)

Alfalfa

0–20

4.11 ± 0.67Aa

0.25 ± 0.02 Aa

0.62 ± 0.01 Ba

17.63 ± 0.43 ABa

9.47 ± 1.72 Ba

66.00 ± 6.25 Ab

3.83 ± 0.55 Aa

 

20–40

4.89 ± 0.52 Aa

0.27 ± 0.02Ba

0.63 ± 0.06 Aa

18.04 ± 0.15 Aa

9.70 ± 1.71 Ba

58.00 ± 2.65 Aa

2.43 ± 0.47 Aa

 

40–60

6.09 ± 0.34Ab

0.32 ± 0.020Bb

0.67 ± 0.02 Aa

17.72 ± 0.33 Aa

13.70 ± 1.01 Cb

59.44 ± 6.95 Aa

8.33 ± 1.00 Cb

 

Mean

5.03 ± 0.98

0.28 ± 0.03

0.64 ± 0.04

17.72 ± 0.33

10.96 ± 2.44

59.44 ± 6.95

4.87 ± 2.74

Oatgrass

0–20

4.69 ± 0.27ABa

0.25 ± 0.05 Aa

0.58 ± 0.01 Aa

17.68 ± 0.37 ABa

9.00 ± 1.56 ABa

59.67 ± 2.08 Aa

6.47 ± 0.12 Aa

 

20–40

4.94 ± 0.20 Aa

0.28 ± 0.03 Ba

0.58 ± 0.02 Aa

17.55 ± 0.31 Aa

9.00 ± 1.56 Aa

62.00 ± 16.52 Aa

8.03 ± 1.67Ba

 

40–60

5.94 ± 0.14 Ab

0.45 ± 0.02Cb

0.65 ± 0.04 Ab

17.86 ± 0.13 Ab

6.57 ± 1.35 Ab

52.67 ± 4.73 Aa

6.97 ± 0.40Ba

 

Mean

5.19 ± 0.60

0.33 ± 0.09

0.60 ± 0.04

17.70 ± 0.29

10.57 ± 1.35

58.11 ± 9.62

7.16 ± 1.10

Control check

0–20

4.89 ± 0.17Ba

0.26 ± 0.02 ABa

0.59 ± 0.01 Ab

17.40 ± 0.16 Aa

6.80 ± 0.35Aa

69.00 ± 16.52 Aa

4.73 ± 3.78 Ab

 

20–40

4.60 ± 0.28 Aa

0.24 ± 0.01 Aa

0.57 ± 0.00 Aa

17.70 ± 0.43 Aa

8.77 ± 0.75ABb

57.67 ± 3.51 Aa

7.20 ± 0.85Ba

 

40–60

5.60 ± 0.43 Ab

0.30 ± 0.01 Bb

0.66 ± 0.02 Aa

17.61 ± 0.27 Aa

12.17 ± 1.02ABc

55.00 ± 2.65 Aa

2.83 ± 0.06Ac

 

Mean

5.03 ± 0.52

0.27 ± 0.03

0.61 ± 0.04

17.57 ± 0.29

9.24 ± 2.44

60.56 ± 10.70

4.92 ± 2.71

  1. Uppercase letters indicate significant differences (P < 0.05) in indicators between different vegetation types at the same soil depth; lowercase letters indicate significant differences (P < 0.05) in indicators between different soil layers within the same vegetation type; the numbers in the table represent the mean ± standard deviation.