Effects of Prosopis velutina Invasion on Soil Characteristics along the Riverine System of the Molopo River in North-West Province, South Africa
Table 3
Mean (±SEM) of selected soil properties in invaded Prosopis stands at five study sites.
Soil properties
Site
Tshidilamolomo I
Tshidilamolomo II
Mabule
Black heat farm
Bray
value
Ca (mg kg−1)
8.80 ± 1.3ab
10.53 ± 2.8a
4.80 ± 0.9c
1.76 ± 0.2d
6.70 ± 0.8bc
<0.05
K (mg kg−1)
0.46 ± 0.1b
0.40 ± 0.0b
0.42 ± 0.0b
0.22 ± 001c
0.68 ± 0.0a
<0.05
Mg (mg kg−1)
2.02 ± 0.7b
3.35 ± 1.8a
2.26 ± 0.3b
0.77 ± 0.0c
1.47 ± 0.0bc
0.002
Na (mg kg−1)
0.03 ± 0.0b
0.02 ± 0.1b
0.05 ± 0.0a
0.02 ± 0.0b
0.03 ± 0.0b
<0.05
OM (%)
1.32 ± 0.7b
3.82 ± 1.6a
0.98 ± 0.3c
0.30 ± 0.1d
1.06 ± 0.7c
<0.05
TN (%)
0.07 ± 0.0a
0.04 ± 0.0b
0.04 ± 0.0b
0.02 ± 0.0c
0.07 ± 0.0a
<0.05
pH
8.1 ± 0.3a
8.2 ± 0.2a
8.1 ± 0.0a
7.4 ± 0.0b
7.8 ± 0.1ab
<0.05
P (mg kg−1)
9.21 ± 2.2d
13.98 ± 3.2c
9.65 ± 0.1d
27.54 ± 0.2b
65.82 ± 8a
<0.05
EC (mS m−1)
0.74 ± 0.2b
0.9 ± 0.2a
0.88 ± 0.3b
0.23 ± 0.1b
2.04 ± 0.1a
<0.05
CEC (cmolc kg−1)
10.59 ± 1.0a
7.52 ± 1.9b
6.56 ± 0.9c
4.50 ± 0.2d
5.84 ± 0.3c
<0.05
Sand (%)
83.0 ± 1.7d
81.7 ± 4.1d
85.0 ± 1.2c
89.5 ± 0.5a
87 ± 0.6b
<0.05
Silt (%)
2.5 ± 0.6a
2.0 ± 1.2a
0.2 ± 0b
0.3 ± 0.6b
0.3 ± 0.6b
<0.05
Clay (%)
13.5 ± 1.7a
16.5 ± 4.0a
15 ± 1.9a
10 ± 0.9a
12.5 ± 0.5a
<0.05
Different superscript letters within each row indicate significant differences () in soil properties between the five sites according to Tukey’s HSD test.
