Effect of anaerobic digestion of manure before application to soil – benefits for nitrogen utilization?
Purpose Anaerobic digestion produces renewable energy, biogas, from organic residues, but also digestate, a valuable organic fertiliser. Previous studies have indicated that digestate contains ample plant available nitrogen (N), but there are also concerns about greenhouse gas (GHG) emissions after...
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| Format: | Article |
| Language: | English |
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Islamic Azad University-Isfahan (Khorasgan) Branch- Iran
2021-03-01
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| Series: | International Journal of Recycling of Organic Waste in Agriculture |
| Subjects: | |
| Online Access: | http://ijrowa.khuisf.ac.ir/article_677185_31cbb00764aad5c1aa6210197937faa0.pdf |
| _version_ | 1797369557631893504 |
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| author | Bente Foereid Julia Szocs Regina J Patinvoh Ilona Sárvári Horváth |
| author_facet | Bente Foereid Julia Szocs Regina J Patinvoh Ilona Sárvári Horváth |
| author_sort | Bente Foereid |
| collection | DOAJ |
| description | Purpose Anaerobic digestion produces renewable energy, biogas, from organic residues, but also digestate, a valuable organic fertiliser. Previous studies have indicated that digestate contains ample plant available nitrogen (N), but there are also concerns about greenhouse gas (GHG) emissions after application of digestates to soil. The aim of this study was to compare digestate and undigested feedstock for fertiliser effect as well as greenhouse gas emissions during the next season. Methods Digestate and its feedstock, manure, were compared as N fertilisers for wheat. Mixing digestate with biochar before application was also tested. After harvest, soil samples were frozen and dried. Then GHG emissions immediately after a re-wetting of dry soil and after thawing of frozen soil were measured to determine emissions after a non-growing season (dry or cold). Results All N in digestate was plant available, while there was no significant N fertiliser effect of the undigested manure. N2O emissions were higher after a dry season than after freezing, but the undigested manure showed higher emissions during thawing than those detected during thawing of soils from any of the other treatments. Conclusion Anaerobic digestion makes N available to plants, and when residues with much N that is not plant available the first season are used, the risk of N2O emission next spring is high. |
| first_indexed | 2024-03-08T17:48:38Z |
| format | Article |
| id | doaj.art-e28b76dbaddf480eac3966bbb7b25195 |
| institution | Directory Open Access Journal |
| issn | 2195-3228 2251-7715 |
| language | English |
| last_indexed | 2024-03-08T17:48:38Z |
| publishDate | 2021-03-01 |
| publisher | Islamic Azad University-Isfahan (Khorasgan) Branch- Iran |
| record_format | Article |
| series | International Journal of Recycling of Organic Waste in Agriculture |
| spelling | doaj.art-e28b76dbaddf480eac3966bbb7b251952024-01-02T10:00:32ZengIslamic Azad University-Isfahan (Khorasgan) Branch- IranInternational Journal of Recycling of Organic Waste in Agriculture2195-32282251-77152021-03-01101899910.30486/ijrowa.2020.1897538.1055677185Effect of anaerobic digestion of manure before application to soil – benefits for nitrogen utilization?Bente Foereid0Julia Szocs1Regina J Patinvoh2Ilona Sárvári Horváth3NIBIO, Norwegian Institute of Bioeconomy Research Pb 115, NO-1431 Ås, NorwayNIBIO, Norwegian Institute of Bioeconomy Research Pb 115, NO-1431 Ås, NorwayDepartment of Chemical and Polymer Engineering, Faculty of Engineering, Lagos State University, Lagos 100268, NigeriaSwedish Centre for Resource Recovery, University of Borås, SE 50190 Borås, SwedenPurpose Anaerobic digestion produces renewable energy, biogas, from organic residues, but also digestate, a valuable organic fertiliser. Previous studies have indicated that digestate contains ample plant available nitrogen (N), but there are also concerns about greenhouse gas (GHG) emissions after application of digestates to soil. The aim of this study was to compare digestate and undigested feedstock for fertiliser effect as well as greenhouse gas emissions during the next season. Methods Digestate and its feedstock, manure, were compared as N fertilisers for wheat. Mixing digestate with biochar before application was also tested. After harvest, soil samples were frozen and dried. Then GHG emissions immediately after a re-wetting of dry soil and after thawing of frozen soil were measured to determine emissions after a non-growing season (dry or cold). Results All N in digestate was plant available, while there was no significant N fertiliser effect of the undigested manure. N2O emissions were higher after a dry season than after freezing, but the undigested manure showed higher emissions during thawing than those detected during thawing of soils from any of the other treatments. Conclusion Anaerobic digestion makes N available to plants, and when residues with much N that is not plant available the first season are used, the risk of N2O emission next spring is high.http://ijrowa.khuisf.ac.ir/article_677185_31cbb00764aad5c1aa6210197937faa0.pdfdigestatenitrogen fertiliser valuebiocharnitrous oxidethawingre-wetting |
| spellingShingle | Bente Foereid Julia Szocs Regina J Patinvoh Ilona Sárvári Horváth Effect of anaerobic digestion of manure before application to soil – benefits for nitrogen utilization? International Journal of Recycling of Organic Waste in Agriculture digestate nitrogen fertiliser value biochar nitrous oxide thawing re-wetting |
| title | Effect of anaerobic digestion of manure before application to soil – benefits for nitrogen utilization? |
| title_full | Effect of anaerobic digestion of manure before application to soil – benefits for nitrogen utilization? |
| title_fullStr | Effect of anaerobic digestion of manure before application to soil – benefits for nitrogen utilization? |
| title_full_unstemmed | Effect of anaerobic digestion of manure before application to soil – benefits for nitrogen utilization? |
| title_short | Effect of anaerobic digestion of manure before application to soil – benefits for nitrogen utilization? |
| title_sort | effect of anaerobic digestion of manure before application to soil benefits for nitrogen utilization |
| topic | digestate nitrogen fertiliser value biochar nitrous oxide thawing re-wetting |
| url | http://ijrowa.khuisf.ac.ir/article_677185_31cbb00764aad5c1aa6210197937faa0.pdf |
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