| Title | Effect of wood ash and crushed rock soil amendments on red clover growth and dinitrogen fixation |
|---|---|
| ID_Doc | 23893 |
| Authors | Dahlin, AS; Stenberg, M |
| Title | Effect of wood ash and crushed rock soil amendments on red clover growth and dinitrogen fixation |
| Year | 2017 |
| Published | Agricultural And Food Science, 26, 4 |
| Abstract | The fertiliser effect of adding wood ash or crushed rock to a low-fertility soil, compared with an unamended control, was assessed in a pot experiment with a perennial ryegrass-red clover mixture. Dinitrogen (N-2) fixation by the clover and translocation of fixed N to the grass were determined using N-15 natural abundance. The wood ash produced the highest accumulated clover biomass over two cuts, followed by the crushed rock. Chemical analyses suggested that the increase was due to K supply by the amendments. The wood ash also led to larger amounts of fixed N compared with the control. However, N-2 fixation was not increased as much as biomass amount, leading to dilution of plant N. There were minor or no treatment effects on mineralisation from soil N pools. This indicates that good-quality wood ash can be successfully used as a multi-element soil amendment to enhance clover growth on low-fertility soils. |
| https://journal.fi/afs/article/download/63739/30552 |
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