Fig. 19.2 Reproductive potential of A. squamatus plants from different height categories
(1: <50 cm; 2: 50–70 cm; 3: 70–110 cm; 4: 110–140 cm; 5: 140–170 cm) measured through
the number of flower heads per single plant (significant differences are marked with different
letters; ANOVA, post-hoc Unequal N HSD)
Table 19.1 Comparison of soil samples with (N ¼ 22) or without A. squamatus (N ¼ 8) with
student t-test (significance at p < 0.05)
Soil parameter
A. squamatus present
A. squamatus absent
t-value (at 28 df)
P
Mean Æ s.d.
Mean Æ s.d.
Salinity
104.4 Æ 59.8
97.6 Æ 36.3
0.30
0.767
Humidity [%]
11.8 Æ 5.4
12.8 Æ 7.8
À0.40
0.694
pH in n/10 KCl
7.3 Æ 0.3
7.3 Æ 0.3
À0.38
0.706
pH in Ca-acetate
93.4 Æ 28.0
102.0 Æ 0.0
À0.86
0.395
P [mg/100 g]
16.2 Æ 13.7
5.9 Æ 1.7
2.10
0.045
K [mg/100 g]
40.1 Æ 26.7
24.0 Æ 17.2
1.58
0.125
Humus [%]
5.6 Æ 4.6
3.5 Æ 2.0
1.24
0.224
C-organic [%]
3.2 Æ 2.7
2.0 Æ 1.2
1.24
0.224
Total N [%]
0.26 Æ 0.2
0.14 Æ 0.1
1.78
0.086
C:N ratio
11.9 Æ 2.1
15.3 Æ 2.3
À3.78
0.001
Zn [mg/kg]
134.9 Æ 125.7
55.5 Æ 51.7
1.72
0.098
19 Reproduction Biology of an Alien Invasive Plant: A Case of. . .
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