Växthusgasutsläpp vid sandinblandning i torvjordar
Peat soils are organic soils which make up significant parts of Sweden land area. Peat soils are commonly used in agriculture. Growing crops in these soils require drainage which speeds up the degradation of the organic matter and increases the greenhouse gas emissions. Cultivated organic soils a...
| Autor principal: | |
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| Formato: | M2 |
| Lenguaje: | sueco Inglés |
| Publicado: |
SLU/Dept. of Soil and Environment
2018
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| Materias: |
| _version_ | 1855572233257222144 |
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| author | Mattsson, Andreas |
| author_browse | Mattsson, Andreas |
| author_facet | Mattsson, Andreas |
| author_sort | Mattsson, Andreas |
| collection | Epsilon Archive for Student Projects |
| description | Peat soils are organic soils which make up significant parts of Sweden land area. Peat soils are
commonly used in agriculture. Growing crops in these soils require drainage which speeds up the
degradation of the organic matter and increases the greenhouse gas emissions. Cultivated organic soils
are responsible for 6-8 % of the total amount of anthropogenic greenhouse gas emissions in Sweden.
Previous studies show a decreased emission flow in peat soils with waste foundry sand mixed in. In this
study, sand and waste foundry sand is mixed in with peat in depths of 2,5 cm and 5 cm, respectively and
studied in a lab environment where emissions of carbon dioxide, nitrous oxide and methane gas were
measured. Results show a noteworthy decrease in carbon dioxide emissions from samples with 5 cm
sand/waste foundry sand mixed in. The waste foundry sand raised the pH level in the soil more than
sand. This is likely the reason that waste foundry sand performed slightly higher emissions since it
improves living conditions for the microorganisms in the soil. Measurements of nitrous oxide and
methane gas showed no clear signs of emissions. The measured concentrations were equivalent to
those occurring naturally in the lab. The conclusion of this study is that both sand and waste foundry
sand can be positive for decreasing the carbon dioxide emissions from peat soils. In order to ensure this
result more substantial studies and a deeper knowledge of the processes in the soils is required. |
| format | M2 |
| id | RepoSLU13373 |
| institution | Swedish University of Agricultural Sciences |
| language | swe Inglés |
| publishDate | 2018 |
| publishDateSort | 2018 |
| publisher | SLU/Dept. of Soil and Environment |
| publisherStr | SLU/Dept. of Soil and Environment |
| record_format | eprints |
| spelling | RepoSLU133732020-05-20T10:53:39Z Växthusgasutsläpp vid sandinblandning i torvjordar Greenhouse gas emissions from sand amended peat soils Mattsson, Andreas torv sand gjuterisand koldioxid växthusgasutsläpp Peat soils are organic soils which make up significant parts of Sweden land area. Peat soils are commonly used in agriculture. Growing crops in these soils require drainage which speeds up the degradation of the organic matter and increases the greenhouse gas emissions. Cultivated organic soils are responsible for 6-8 % of the total amount of anthropogenic greenhouse gas emissions in Sweden. Previous studies show a decreased emission flow in peat soils with waste foundry sand mixed in. In this study, sand and waste foundry sand is mixed in with peat in depths of 2,5 cm and 5 cm, respectively and studied in a lab environment where emissions of carbon dioxide, nitrous oxide and methane gas were measured. Results show a noteworthy decrease in carbon dioxide emissions from samples with 5 cm sand/waste foundry sand mixed in. The waste foundry sand raised the pH level in the soil more than sand. This is likely the reason that waste foundry sand performed slightly higher emissions since it improves living conditions for the microorganisms in the soil. Measurements of nitrous oxide and methane gas showed no clear signs of emissions. The measured concentrations were equivalent to those occurring naturally in the lab. The conclusion of this study is that both sand and waste foundry sand can be positive for decreasing the carbon dioxide emissions from peat soils. In order to ensure this result more substantial studies and a deeper knowledge of the processes in the soils is required. Torvjordar är organogena jordar och upptar en betydande del av Sveriges yta. De har flertalet användningsområden för människor och används ofta inom jordbruk. Vid odling på torvjordar krävs dränering vilket leder till ökad nedbrytning av det organiska materialet och resulterar i växthusgasutsläpp. Sveriges brukade torvjordar står för 6-8 % av antropogena utsläpp av växthusgaser årligen. Studier som tidigare gjorts med inblandning av gjuterisand i åkrar av torvjord visar på minskade växthusgasutsläpp. I föreliggande studie undersöks i laborationsmiljö hur utsläppen av koldioxid, lustgas och metangas påverkas vid inblandning av sand samt gjuterisand i volymerna 2,5 cm och 5 cm av ytlagret. Resultaten visar att koldioxidutsläppen minskar märkbart vid de större inblandningarna med 5 cm sand/gjuterisand. Gjuterisanden hade en större pH-höjande effekt på jorden vilket kan ha bidragit till att den presterade lite högre utsläpp än sanden. Högre pH-värde gynnar mikroorganismernas levnadsmiljö. Lustgas- och metangasmätningarna gav inga tydliga tecken på utsläpp. Koncentrationerna i mätningarna var likvärdig med naturliga koncentrationer i luften. Slutsats från denna studie är att både inblandning av sand och gjuterisand kan vara positivt för att minska torvmarkers utsläpp av koldioxid. Mer omfattande undersökningar och djupare kunskap om dessa processer krävs dock för att säkerställa detta. SLU/Dept. of Soil and Environment 2018 M2 swe eng https://stud.epsilon.slu.se/13373/ |
| spellingShingle | torv sand gjuterisand koldioxid växthusgasutsläpp Mattsson, Andreas Växthusgasutsläpp vid sandinblandning i torvjordar |
| title | Växthusgasutsläpp vid sandinblandning i torvjordar |
| title_full | Växthusgasutsläpp vid sandinblandning i torvjordar |
| title_fullStr | Växthusgasutsläpp vid sandinblandning i torvjordar |
| title_full_unstemmed | Växthusgasutsläpp vid sandinblandning i torvjordar |
| title_short | Växthusgasutsläpp vid sandinblandning i torvjordar |
| title_sort | växthusgasutsläpp vid sandinblandning i torvjordar |
| topic | torv sand gjuterisand koldioxid växthusgasutsläpp |