Table 2.
Content of crude ash, minerals and trace elements (kg−1 DM) of U. lactuca and extracted fraction
| Element | U. lactuca | Extracted fraction | Soybean meala |
|---|---|---|---|
| Ash (g) | 173 | 160 | 65 |
| Macro minerals | |||
| P (g) | 2.56 | 1.79 | 7.3 |
| Ca (g) | 20.3 | 26.5 | 3.2 |
| K (g) | 11.5 | 6.8 | 25.2 |
| Mg (g) | 24.2 | 14.5 | 3.4 |
| Na (g) | 10.7 | 10.6 | 0.2 |
| Cl (g) | 9.6 | 11.8 | 0.3 |
| S (g) | 50.5 | 27.0 | 4.1 |
| Trace elements | |||
| Cu (mg) | 22 | 41 | 17 |
| Fe (mg) | 353 | 658 | 270 |
| Mn (mg) | 86 | 74 | 46 |
| Zn (mg) | 17 | 39 | 55 |
| Ni (mg) | 8.5 | 12.0 | n.a. |
| As (mg) | 5.8 | 7.3 | n.a. |
| Co (μg) | 271 | 503 | 344 |
| Se (μg) | <100 | 109 | n.a. |
| Cd (μg) | 257 | 411 | n.a. |
| Pb (μg) | 956 | 1825 | n.a. |
| Hg (μg) | <10 | 19 | n.a. |
n.a. not available
aCVB (2007)