Table 4 Main characteristics of the fertilizers used
Fertilizers | Abbr. | Inorg/org | Dry matter content (%) | Total P (mg P g−1) | Water extractable P (mg P g−1) | Total N (mg N g−1) | Ammonium (NH4 + − N) (mg N g−1) |
|---|---|---|---|---|---|---|---|
Triple super phosphate | TSP | Inorg | 100 | 201.0 | 201.0 | 0 | 0 |
Rock phosphate | RP | Inorg | 100 | 115.4 | 0.22 | 0 | 0 |
Sewage sludge ashes (Germany) | SSA-DE | Inorg | 100 | 103.5 | 0.79 | n.d. | n.d. |
Sewage sludge ashes (Denmark) | SSA-DK | Inorg | 100 | 89 | n.d. | n.d. | n.d. |
P-enriched BOF slag (Germany) | LSD/SSA | Inorg | 100 | 18.0 | 0.0 | n.d. | n.d. |
Fresh digestate (Switzerland) | FrDi | Org | 48.0 | 4.36 | 0.130 | 14.6 | 0.61 |
Compost (Switzerland) | Comp-CH | Org | 59.6 | 2.45 | 0.043 | 10.4 | 0.24 |
Compost (Germany) | Comp-DE | Org | 57.2 | 1.42 | 0.67 | n.d. | n.d. |
Composted cattle manure (Italy) | C-MComp | Org | 60.0 | 7.75 | n.d. | 22.7 | n.d. |
Composted horse manure (Italy) | H-MComp | Org | 67.0 | 10.0 | n.d. | 14.2 | n.d. |
Sewage sludge (Germany) | SS-DE | Org | 99 | 38.1 | 0.52 | n.d. | n.d. |
Sewage sludge (Denmark) | SS-DK | Org | 23.0 | 30.4 | 1.5 | n.d. | n.d. |