Availability and Plant Uptake of Biosolid-Borne Metals
Table 3
Metal concentrations (means where ) of three wheat cultivars grown on sand media amended, without biosolids (Standard) and with biosolids†.
Plant tissue
Treatment
Duration (weeks)
0–4
4–12
Chinese Spring
Triticum aestivum
Yecora Rojo
Chinese Spring
Triticum aestivum
Yecora Rojo
mg kg−1
Cd
Shoot
Standard
2.53a
2.55a
2.56a
0.56b
0.75b
1.01a
Biosolids
24.6a
29.8a
24.4a
6.06b
8.75a
8.47a
Root
Standard
2.63a
2.64a
2.84a
0.75a
0.78a
0.72a
Biosolids
41.8a
39.3a
26.1b
18.0a
12.9c
15.8b
Cr
Shoot
Standard
1.75a
1.73a
1.75a
1.54a
1.15b
1.52a
Biosolids
2.77a
2.70a
2.69a
1.51a
1.56a
1.52a
Root
Standard
1.77a
1.76a
1.81a
1.45a
1.44a
1.44a
Biosolids
34.5b
42.7a
33.2b
12.2a
9.11b
4.99c
Cu
Shoot
Standard
16.0a
15.5a
16.0a
4.44b
4.46b
5.07a
Biosolids
27.7a
27.4a
20.0b
9.50a
7.73b
6.41c
Root
Standard
17.4a
17.3a
17.7a
12.0a
12.5a
10.3b
Biosolids
79.9a
77.1a
77.5a
64.8a
59.9b
60.9b
Ni
Shoot
Standard
21.1a
21.4a
21.2a
9.82a
9.72a
9.20a
Biosolids
64.9a
54.6b
54.9b
40.5a
34.5b
34.3b
Root
Standard
52.5a
52.6a
53.7a
34.4a
34.6a
35.1a
Biosolids
135a
158a
154a
112a
120a
118a
Pb
Shoot
Standard
2.62a
2.41a
2.63a
1.49b
1.41b
1.93a
Biosolids
12.6a
10.2b
10.8b
7.49a
7.13a
6.57b
Root
Standard
2.69a
2.72a
2.87a
1.67b
2.03a
2.23a
Biosolids
14.2a
16.2a
16.6a
9.24a
10.9a
10.0a
Zn
Shoot
Standard
45.7a
43.4a
42.9a
31.5a
28.7a
31.3a
Biosolids
319a
338a
271b
124a
144a
125a
Root
Standard
68.5a
60.3b
51.0c
28.5a
28.5a
32.7a
Biosolids
610a
682a
633a
304a
342a
286a
The differences of metal concentrations among the growth period were tested by one-way ANOVA and Student-Newman-Keuls test. Within a row and between shoot and root of each growth periods, values followed by a different letter were significantly different at .