Table 3 P-fertilisation treatments applied in the experiments
From: Effect of bioeffectors and recycled P-fertiliser products on the growth of spring wheat
P fertiliser | Treatment abbreviation | Total P content in product (g kg−1) | Water-extractable P (% of total P) | App. rate (g dry product kg−1 soil) | P app. rate (mg P kg−1 soil) |
|---|---|---|---|---|---|
Negative control | P0 | n.a. | n.a. | n.a. | n.a. |
Triple superphosphate | TSP | 200 | 43.3 | 0.25 | 50 |
Superphosphate | SP | 81 | 11.4 | 0.62 | 50 |
Thomas phosphate | Thph | 68 | 0 | 0.73 | 50 |
Sewage sludge, HK Kalke | SS | 36 | n.d. | 1.40 | 50 |
Sewage sludge, UCPH | SS | 37 | n.d. | 1.36 | 50 |
Sewage sludge ash, HK Kalke | SSA | 103 | 0.18 | 0.48 | 50 |
Sewage sludge ash, UCPH | SSA | 89 | n.d. | 0.56 | 50 |
Fibre fraction of pig manure | FFPM | 2.4 | n.d. | 50 | |
SSA-enriched LD slag | LDS/SSA | 17 | 0 | 2.92 | 50 |
Compost mainly consisting of sewage sludge and garden/park waste | Comp | 3.6a,b | n.d. | 13.8b | 50 |
Ashes from cereal straw | StA | 13.6 | 6.5 | 10 | 136 |
Ashes from wood chips | WoA | 10.2 | 0.05 | 10 | 102 |
Dipotassium phosphate | DKP | 178 | 100 | 0.18 | 32 |