Short-Term Effects of Biogas Digestates and Pig Slurry Application on Soil Microbial Activity
The effect of four biogas digestates (BD-A, BD-B, BD-C, and BD-D) and pig slurry (PS) on soil microbial functions was assessed at application rates corresponding to 0–1120 kg NH4+-N ha−1. At dose corresponding to 140 kg NH4+-N ha−1, 30.9–32.5% of the carbon applied in BD-A, BD-C, and PS was utilized...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Applied and Environmental Soil Science |
| Online Access: | http://dx.doi.org/10.1155/2015/658542 |
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| author | J. Abubaker K. Risberg E. Jönsson A. S. Dahlin H. Cederlund M. Pell |
| author_facet | J. Abubaker K. Risberg E. Jönsson A. S. Dahlin H. Cederlund M. Pell |
| author_sort | J. Abubaker |
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| description | The effect of four biogas digestates (BD-A, BD-B, BD-C, and BD-D) and pig slurry (PS) on soil microbial functions was assessed at application rates corresponding to 0–1120 kg NH4+-N ha−1. At dose corresponding to 140 kg NH4+-N ha−1, 30.9–32.5% of the carbon applied in BD-A, BD-C, and PS was utilized during 12 days, while for BD-B and BD-D corresponding utilization was 19.0 and 16.9%, respectively. All BDs resulted in net nitrogen assimilation at low rates (17.5–140 kg NH4+-N ha−1) but net mineralization dominated at higher rates. PS resulted in net mineralization at all application rates. All residues inhibited potential ammonium oxidation (PAO), with EC50-values ranging between 45 and 302 kg NH4+-N ha−1. Low rates of BDs appeared to weakly stimulate potential denitrification activity (PDA), while higher rates resulted in logarithmic decrease. The EC50-values for PDA were between 238 and 347 kg NH4+-N ha−1. No inhibition of PDA was observed after amendment with PS. In conclusion, biogas digestates inhibited ammonia oxidation and denitrification, which could be an early warning of potential hazardous substances in the digestates. However, this effect can also be regarded as positive, since it may reduce nitrogen losses. |
| format | Article |
| id | doaj-art-4fbb926791e44bafb2e3da8f248c0bdb |
| institution | Kabale University |
| issn | 1687-7667 1687-7675 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
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| series | Applied and Environmental Soil Science |
| spelling | doaj-art-4fbb926791e44bafb2e3da8f248c0bdb2025-02-03T05:51:37ZengWileyApplied and Environmental Soil Science1687-76671687-76752015-01-01201510.1155/2015/658542658542Short-Term Effects of Biogas Digestates and Pig Slurry Application on Soil Microbial ActivityJ. Abubaker0K. Risberg1E. Jönsson2A. S. Dahlin3H. Cederlund4M. Pell5Department of Microbiology, Swedish University of Agricultural Sciences (SLU), P.O. Box 7025, 750 07 Uppsala, SwedenDepartment of Microbiology, Swedish University of Agricultural Sciences (SLU), P.O. Box 7025, 750 07 Uppsala, SwedenDepartment of Microbiology, Swedish University of Agricultural Sciences (SLU), P.O. Box 7025, 750 07 Uppsala, SwedenDepartment of Soil and Environment, Swedish University of Agricultural Sciences (SLU), P.O. Box 7014, 750 07 Uppsala, SwedenDepartment of Microbiology, Swedish University of Agricultural Sciences (SLU), P.O. Box 7025, 750 07 Uppsala, SwedenDepartment of Microbiology, Swedish University of Agricultural Sciences (SLU), P.O. Box 7025, 750 07 Uppsala, SwedenThe effect of four biogas digestates (BD-A, BD-B, BD-C, and BD-D) and pig slurry (PS) on soil microbial functions was assessed at application rates corresponding to 0–1120 kg NH4+-N ha−1. At dose corresponding to 140 kg NH4+-N ha−1, 30.9–32.5% of the carbon applied in BD-A, BD-C, and PS was utilized during 12 days, while for BD-B and BD-D corresponding utilization was 19.0 and 16.9%, respectively. All BDs resulted in net nitrogen assimilation at low rates (17.5–140 kg NH4+-N ha−1) but net mineralization dominated at higher rates. PS resulted in net mineralization at all application rates. All residues inhibited potential ammonium oxidation (PAO), with EC50-values ranging between 45 and 302 kg NH4+-N ha−1. Low rates of BDs appeared to weakly stimulate potential denitrification activity (PDA), while higher rates resulted in logarithmic decrease. The EC50-values for PDA were between 238 and 347 kg NH4+-N ha−1. No inhibition of PDA was observed after amendment with PS. In conclusion, biogas digestates inhibited ammonia oxidation and denitrification, which could be an early warning of potential hazardous substances in the digestates. However, this effect can also be regarded as positive, since it may reduce nitrogen losses.http://dx.doi.org/10.1155/2015/658542 |
| spellingShingle | J. Abubaker K. Risberg E. Jönsson A. S. Dahlin H. Cederlund M. Pell Short-Term Effects of Biogas Digestates and Pig Slurry Application on Soil Microbial Activity Applied and Environmental Soil Science |
| title | Short-Term Effects of Biogas Digestates and Pig Slurry Application on Soil Microbial Activity |
| title_full | Short-Term Effects of Biogas Digestates and Pig Slurry Application on Soil Microbial Activity |
| title_fullStr | Short-Term Effects of Biogas Digestates and Pig Slurry Application on Soil Microbial Activity |
| title_full_unstemmed | Short-Term Effects of Biogas Digestates and Pig Slurry Application on Soil Microbial Activity |
| title_short | Short-Term Effects of Biogas Digestates and Pig Slurry Application on Soil Microbial Activity |
| title_sort | short term effects of biogas digestates and pig slurry application on soil microbial activity |
| url | http://dx.doi.org/10.1155/2015/658542 |
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