Table 2 Trace metal profiles of commonly used fertilizers in Sri Lanka
(mg/kg) | Urea | MOP | TSP | |||
|---|---|---|---|---|---|---|
Element | Mean | Range | Mean | Range | Mean | Range |
Al | 2.6 | 1.0-3.3 | 151.3 | 97.9-231.1 | 9939.0 | 8923.0-11290.0 |
Sb | 0.1 | 0.1-0.2 | 0.1 | 0.1-0.1 | 6.0 | 5.7-6.0 |
As | 0.1 | ND-0.3 | 0.3 | 0.2-0.4 | 28.9 | 26.5-31.9 |
Ba | 0.1 | 0.1-0.1 | 1.1 | 1.0-1.3 | 79.1 | 77.6-83.4 |
Be | 0.1 | 0.1-0.1 | 0.1 | 0.1-0.2 | 2.2 | 2.1-2.3 |
Cd | ND | ND | 0.1 | 0.1-0.2 | 2.0 | 1.9-2.0 |
Cr | ND | ND | 1.2 | 0.4-2.7 | 29.3 | 22.6-33.7 |
Co | 0.1 | 0.1-0.1 | 0.2 | 0.2-0.3 | 6.0 | 5.9-6.4 |
Cu | 0.2 | 0.1-0.4 | 0.3 | 0.3-0.4 | 15.0 | 14.2-16.0 |
Fe | 1.0 | ND-1.7 | 2371.3 | 2252.3-2634.3 | 11215.3 | 10910.3-11760.3 |
Pb | 0.2 | 0.2 - 0.2 | 0.8 | 0.8-0.9 | 252.5 | 251.7-263.9 |
Mn | 0.3 | 0.1-0.4 | 12.3 | 11.6-13.7 | 1948.0 | 1886.0-2034.0 |
Ni | 1.0 | 0.2-3.7 | 0.3 | 0.2-0.5 | 25.0 | 23.9-27.1 |
Se | 0.2 | ND-0.5 | 1.7 | 1.4-2.1 | 2.0 | 1.2-2.5 |
Ag | 0.1 | 0.1-0.1 | 0.1 | 0.1-0.1 | 0.3 | 0.1-0.3 |
Sr | 0.1 | ND-0.1 | 10.2 | 9.8-10.6 | 245 | 230-277.9 |
Tl | 0.1 | ND-0.1 | 0.1 | ND-0.2 | 0.5 | 0.5-0.5 |
Sn | 0.1 | 0.1-0.2 | 0.2 | 0.2-0.3 | 0.7 | 0.7-0.7 |
Ti | ND | ND | 4.1 | 2.6-5.0 | 439.6 | 379.0-496.3 |
V | 0.2 | 0.2-0.4 | 0.3 | 0.2-0.5 | 37.1 | 34.9-39.3 |
Zn | ND | ND | 0.8 | 0.2-1.3 | 489.8 | 443.6-544.0 |