Tillsats av biokol till en svensk sandjord : effekter på lustgasavgång, kväveretention och andel vattenfyllda porer
In a column experiment the effect of three different biochars on nitrous gas emissions, nitrogen retention and water filled pore space (WFPS) were studied in a Swedish sandy soil, classified as a Cryopsamment. Ammonium retention was positively correlated, while KCl-extractable ammonium was negativel...
| Autor principal: | |
|---|---|
| Formato: | M2 |
| Lenguaje: | sueco Inglés |
| Publicado: |
SLU/Dept. of Soil and Environment
2009
|
| Materias: |
| _version_ | 1855570213392613376 |
|---|---|
| author | Almers, Rickard |
| author_browse | Almers, Rickard |
| author_facet | Almers, Rickard |
| author_sort | Almers, Rickard |
| collection | Epsilon Archive for Student Projects |
| description | In a column experiment the effect of three different biochars on nitrous gas emissions, nitrogen
retention and water filled pore space (WFPS) were studied in a Swedish sandy soil, classified as a
Cryopsamment. Ammonium retention was positively correlated, while KCl-extractable ammonium
was negatively correlated, with the specific area of the biochars. The question was raised whether the
negative correlation between extractable ammonium and biochar specific area reflects the amount of
ammonium present in the soil or its extractability from the biochar, and whether methods for
extracting soil mineral nitrogen, like KCl-extractions, have to be modified for application on biochar
amended soils. There was a tendency of increased nitrate retention and KCl-extractable nitrate with
biochar and KCl-extractable nitrate was positively correlated with the specific area of the biochar. pH
was higher for all biochars compared with control, although the differences were not significant, and
WFPS was lowered by biochar addition, significantly in one case. Nitrous oxide emissions were
generelly lower from biochar amended columns, although emissions from one of the biochars was
higher than control in the beginning of the measurements. The effect on nitrous oxide emissions
seem, in part, to be mediated by the increase in pH from the biochar addition. Among other factors,
nitrous oxide emissions was also negatively correlated with the specific area of the biochar. |
| format | M2 |
| id | RepoSLU667 |
| institution | Swedish University of Agricultural Sciences |
| language | swe Inglés |
| publishDate | 2009 |
| publishDateSort | 2009 |
| publisher | SLU/Dept. of Soil and Environment |
| publisherStr | SLU/Dept. of Soil and Environment |
| record_format | eprints |
| spelling | RepoSLU6672012-04-20T14:10:29Z Tillsats av biokol till en svensk sandjord : effekter på lustgasavgång, kväveretention och andel vattenfyllda porer Addition of biochar to a Swedish sandy soil : effects on nitrous gas emissions, nitrogen retention and water saturation Almers, Rickard lustgas N2O denitrifikation biokol träkol svartkol kväveretention nitratretention ammoniumretention klimatförändringar CO2 koldioxid carbon capture and storage CCS kolsänka In a column experiment the effect of three different biochars on nitrous gas emissions, nitrogen retention and water filled pore space (WFPS) were studied in a Swedish sandy soil, classified as a Cryopsamment. Ammonium retention was positively correlated, while KCl-extractable ammonium was negatively correlated, with the specific area of the biochars. The question was raised whether the negative correlation between extractable ammonium and biochar specific area reflects the amount of ammonium present in the soil or its extractability from the biochar, and whether methods for extracting soil mineral nitrogen, like KCl-extractions, have to be modified for application on biochar amended soils. There was a tendency of increased nitrate retention and KCl-extractable nitrate with biochar and KCl-extractable nitrate was positively correlated with the specific area of the biochar. pH was higher for all biochars compared with control, although the differences were not significant, and WFPS was lowered by biochar addition, significantly in one case. Nitrous oxide emissions were generelly lower from biochar amended columns, although emissions from one of the biochars was higher than control in the beginning of the measurements. The effect on nitrous oxide emissions seem, in part, to be mediated by the increase in pH from the biochar addition. Among other factors, nitrous oxide emissions was also negatively correlated with the specific area of the biochar. I ett kolonnförsök studerades effekten av tre sorters biokol på lustgasavgång, kväveretention och andel vattenfyllda porer (WFPS) i en svensk sandjord (klassificerad som Cryopsamment). Ammoniumretentionen var positivt korrelerad med kolets specifika yta, medan KCl-extraherbart ammonium var negativt korrelerad med kolets specifika yta. Det diskuterades huruvida den negativa korrelationen med kolets specifika yta berodde på mängden ammonium i jorden eller dess extraherbarhet och om metoder för att mäta markkväve behöver modifieras för att ge en rättvisande bild på biokolberikade jordar. Det fanns en tendens till ökad nitratretention och mängd KClextraherbart nitrat med biokol och KCl-extraherbart nitrat var positivt korrelerat med den specifika ytan på kolet. pH var högre med alla kolsorter jämfört med kontrollbehandlingen, även om skillnaderna inte var signifikanta, och WFPS minskades av tillsatt biokol, signifikant i ett av fallen. Lustgasavgången var generellt sett lägre från de biokolberikade kolonnerna, men från en av kolsorterna var avgången högre i början av lustgasmätningarna. Effekten på lustgasavgången verkar delvis orsakas av biokolets pH-höjande effekt. Bland andra faktorer korrelerade med lustgasavgången fanns kolets specifika yta som var negativt korrelerad med lustgasavgången. SLU/Dept. of Soil and Environment 2009 M2 swe eng https://stud.epsilon.slu.se/667/ |
| spellingShingle | lustgas N2O denitrifikation biokol träkol svartkol kväveretention nitratretention ammoniumretention klimatförändringar CO2 koldioxid carbon capture and storage CCS kolsänka Almers, Rickard Tillsats av biokol till en svensk sandjord : effekter på lustgasavgång, kväveretention och andel vattenfyllda porer |
| title | Tillsats av biokol till en svensk sandjord : effekter på lustgasavgång, kväveretention och andel vattenfyllda porer |
| title_full | Tillsats av biokol till en svensk sandjord : effekter på lustgasavgång, kväveretention och andel vattenfyllda porer |
| title_fullStr | Tillsats av biokol till en svensk sandjord : effekter på lustgasavgång, kväveretention och andel vattenfyllda porer |
| title_full_unstemmed | Tillsats av biokol till en svensk sandjord : effekter på lustgasavgång, kväveretention och andel vattenfyllda porer |
| title_short | Tillsats av biokol till en svensk sandjord : effekter på lustgasavgång, kväveretention och andel vattenfyllda porer |
| title_sort | tillsats av biokol till en svensk sandjord : effekter på lustgasavgång, kväveretention och andel vattenfyllda porer |
| topic | lustgas N2O denitrifikation biokol träkol svartkol kväveretention nitratretention ammoniumretention klimatförändringar CO2 koldioxid carbon capture and storage CCS kolsänka |