Low-temperature hay biochar and acid treatment increases fertiliser value of slurry digestate
This study aimed to evaluate the effect of low-temperature-produced (torrefied at 300°C) hay biochar (BC) on the fertilisation effectiveness of digestate (SD) and the loss of nitrogen (N) and carbon (C). We also examined whether acidification could increase the effect of BC on SD effectiveness and c...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2025-12-01
|
| Series: | Acta Agriculturae Scandinavica. Section B, Soil and Plant Science |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/09064710.2025.2538465 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849395051407343616 |
|---|---|
| author | Pavel Covali Henn Raave Jordi Escuer-Gatius Tõnu Tõnutare Alar Astover |
| author_facet | Pavel Covali Henn Raave Jordi Escuer-Gatius Tõnu Tõnutare Alar Astover |
| author_sort | Pavel Covali |
| collection | DOAJ |
| description | This study aimed to evaluate the effect of low-temperature-produced (torrefied at 300°C) hay biochar (BC) on the fertilisation effectiveness of digestate (SD) and the loss of nitrogen (N) and carbon (C). We also examined whether acidification could increase the effect of BC on SD effectiveness and compared the effects of untreated and acidified BCs with that of sulphuric acid (H₂SO₄). The treatments included unamended SD (SDUT) and SD amended with untreated BC (BCUT), H3PO4-acidified BC, (BCH3PO4) H2SO4-acidified BC (BCH2SO4), or pure H2SO4. These treatments were compared in a pot experiment with ryegrass (Lolium perenne, L.) and evaluated based on N, phosphorus (P), potassium (K), calcium (Ca), and magnesium (Mg) taken up by plants and remaining in the soil. The N input to the soil was doubled for all applied amendments compared with SDUT. However, the fertilisation effectiveness of SD amended with BCUT alone was comparable to that of SD treated with pure H₂SO₄, offering the additional benefits of higher C input and reduced C loss from the soil. We concluded that the effect of BC on the effectiveness of SD as a fertiliser is similar to, or even better than, that of H2SO4. |
| format | Article |
| id | doaj-art-bd9cbffbc5f24ce5b029d02e250134e3 |
| institution | Kabale University |
| issn | 0906-4710 1651-1913 |
| language | English |
| publishDate | 2025-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Acta Agriculturae Scandinavica. Section B, Soil and Plant Science |
| spelling | doaj-art-bd9cbffbc5f24ce5b029d02e250134e32025-08-20T03:39:45ZengTaylor & Francis GroupActa Agriculturae Scandinavica. Section B, Soil and Plant Science0906-47101651-19132025-12-0175110.1080/09064710.2025.2538465Low-temperature hay biochar and acid treatment increases fertiliser value of slurry digestatePavel Covali0Henn Raave1Jordi Escuer-Gatius2Tõnu Tõnutare3Alar Astover4Chair of Soil Science, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, EstoniaChair of Soil Science, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, EstoniaChair of Soil Science, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, EstoniaChair of Soil Science, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, EstoniaChair of Soil Science, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, EstoniaThis study aimed to evaluate the effect of low-temperature-produced (torrefied at 300°C) hay biochar (BC) on the fertilisation effectiveness of digestate (SD) and the loss of nitrogen (N) and carbon (C). We also examined whether acidification could increase the effect of BC on SD effectiveness and compared the effects of untreated and acidified BCs with that of sulphuric acid (H₂SO₄). The treatments included unamended SD (SDUT) and SD amended with untreated BC (BCUT), H3PO4-acidified BC, (BCH3PO4) H2SO4-acidified BC (BCH2SO4), or pure H2SO4. These treatments were compared in a pot experiment with ryegrass (Lolium perenne, L.) and evaluated based on N, phosphorus (P), potassium (K), calcium (Ca), and magnesium (Mg) taken up by plants and remaining in the soil. The N input to the soil was doubled for all applied amendments compared with SDUT. However, the fertilisation effectiveness of SD amended with BCUT alone was comparable to that of SD treated with pure H₂SO₄, offering the additional benefits of higher C input and reduced C loss from the soil. We concluded that the effect of BC on the effectiveness of SD as a fertiliser is similar to, or even better than, that of H2SO4.https://www.tandfonline.com/doi/10.1080/09064710.2025.2538465Acidified biocharbiocharliquid manure digestateorganic fertiliserN and C lossnutrient uptake |
| spellingShingle | Pavel Covali Henn Raave Jordi Escuer-Gatius Tõnu Tõnutare Alar Astover Low-temperature hay biochar and acid treatment increases fertiliser value of slurry digestate Acta Agriculturae Scandinavica. Section B, Soil and Plant Science Acidified biochar biochar liquid manure digestate organic fertiliser N and C loss nutrient uptake |
| title | Low-temperature hay biochar and acid treatment increases fertiliser value of slurry digestate |
| title_full | Low-temperature hay biochar and acid treatment increases fertiliser value of slurry digestate |
| title_fullStr | Low-temperature hay biochar and acid treatment increases fertiliser value of slurry digestate |
| title_full_unstemmed | Low-temperature hay biochar and acid treatment increases fertiliser value of slurry digestate |
| title_short | Low-temperature hay biochar and acid treatment increases fertiliser value of slurry digestate |
| title_sort | low temperature hay biochar and acid treatment increases fertiliser value of slurry digestate |
| topic | Acidified biochar biochar liquid manure digestate organic fertiliser N and C loss nutrient uptake |
| url | https://www.tandfonline.com/doi/10.1080/09064710.2025.2538465 |
| work_keys_str_mv | AT pavelcovali lowtemperaturehaybiocharandacidtreatmentincreasesfertiliservalueofslurrydigestate AT hennraave lowtemperaturehaybiocharandacidtreatmentincreasesfertiliservalueofslurrydigestate AT jordiescuergatius lowtemperaturehaybiocharandacidtreatmentincreasesfertiliservalueofslurrydigestate AT tonutonutare lowtemperaturehaybiocharandacidtreatmentincreasesfertiliservalueofslurrydigestate AT alarastover lowtemperaturehaybiocharandacidtreatmentincreasesfertiliservalueofslurrydigestate |