Pfeiffer, Birgit

[["dc.contributor.author","Rummel, Pauline Sophie"],["dc.contributor.author","Pfeiffer, Birgit"],["dc.contributor.author","Pausch, Johanna"],["dc.contributor.author","Well, Reinhard"],["dc.contributor.author","Schneider, Dominik"],["dc.contributor.author","Dittert, Klaus"],["dc.date.accessioned","2020-05-27T11:48:41Z"],["dc.date.accessioned","2021-10-27T13:20:18Z"],["dc.date.available","2020-05-27T11:48:41Z"],["dc.date.available","2021-10-27T13:20:18Z"],["dc.date.issued","2020"],["dc.description.abstract","Chemical composition of root and shoot litter controls decomposition and, subsequently, C availability for biological nitrogen transformation processes in soils. While aboveground plant residues have been proven to increase $ emissions, studies on root litter effects are scarce. This study aimed (1) to evaluate how fresh maize root litter affects $ emissions compared to fresh maize shoot litter, (2) to assess whether $ emissions are related to the interaction of C and N mineralization from soil and litter, and (3) to analyze changes in soil microbial community structures related to litter input and $ emissions. To obtain root and shoot litter, maize plants (Zea mays L.) were cultivated with two N fertilizer levels in a greenhouse and harvested. A two-factorial 22 d laboratory incubation experiment was set up with soil from both N levels (N1, N2) and three litter addition treatments (control, root, root + shoot). We measured $ and $ fluxes, analyzed soil mineral N and water-extractable organic C (WEOC) concentrations, and determined quality parameters of maize litter. Bacterial community structures were analyzed using 16S rRNA gene sequencing. Maize litter quality controlled ^−_3$ and WEOC availability and decomposition-related $ emissions. Emissions induced by maize root litter remained low, while high bioavailability of maize shoot litter strongly increased $ and $ emissions when both root and shoot litter were added. We identified a strong positive correlation between cumulative $ and $ emissions, supporting our hypothesis that litter quality affects denitrification by creating plant-litter-associated anaerobic microsites. The interdependency of C and N availability was validated by analyses of regression. Moreover, there was a strong positive interaction between soil ^−_3$ and WEOC concentration resulting in much higher $ emissions, when both ^−_3$ and WEOC were available. A significant correlation was observed between total $ and $ emissions, the soil bacterial community composition, and the litter level, showing a clear separation of root + shoot samples of all remaining samples. Bacterial diversity decreased with higher N level and higher input of easily available C. Altogether, changes in bacterial community structure reflected degradability of maize litter with easily degradable C from maize shoot litter favoring fast-growing C-cycling and N-reducing bacteria of the phyla Actinobacteria, Chloroflexi, Firmicutes, and Proteobacteria. In conclusion, litter quality is a major driver of $ and $ emissions from crop residues, especially when soil mineral N is limited."],["dc.identifier.doi","10.5194/bg-2019-320"],["dc.identifier.doi","10.5194/bg-2019-320-supplement"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/17344"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/91954"],["dc.language.iso","en"],["dc.notes.intern","Migrated from goescholar"],["dc.relation.orgunit","Fakultät für Agrarwissenschaften"],["dc.rights","CC BY 4.0"],["dc.rights.access","openAccess"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.subject","NITROUS-OXIDE EMISSIONS; CHEMICAL-COMPOSITION; MICROBIAL BIOMASS; CROP RESIDUES; SP-NOV.; HETEROTROPHIC NITRIFICATION; NITRIFIER DENITRIFICATION; CARBON MINERALIZATION; AGROFORESTRY RESIDUES; BIOCHEMICAL QUALITY"],["dc.subject.ddc","630"],["dc.title","Maize root and shoot litter quality controls short-term $ and $ emissions and bacterial community structure of arable soil"],["dc.type","preprint"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","5309"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","Applied Sciences"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","Rummel, Pauline Sophie"],["dc.contributor.author","Well, Reinhard"],["dc.contributor.author","Pausch, Johanna"],["dc.contributor.author","Pfeiffer, Birgit"],["dc.contributor.author","Dittert, Klaus"],["dc.date.accessioned","2021-07-05T15:00:41Z"],["dc.date.available","2021-07-05T15:00:41Z"],["dc.date.issued","2021"],["dc.description.abstract","Returning crop residues to agricultural fields can accelerate nutrient turnover and increase N2O and NO emissions. Increased microbial respiration may lead to formation of local hotspots with anoxic or microoxic conditions promoting denitrification. To investigate the effect of litter quality on CO2, NO, N2O, and N2 emissions, we conducted a laboratory incubation study in a controlled atmosphere (He/O2, or pure He) with different maize litter types (Zea mays L., young leaves and roots, straw). We applied the N2O isotopocule mapping approach to distinguish between N2O emitting processes and partitioned the CO2 efflux into litter- and soil organic matter (SOM)-derived CO2 based on the natural 13C isotope abundances. Maize litter increased total and SOM derived CO2 emissions leading to a positive priming effect. Although C turnover was high, NO and N2O fluxes were low under oxic conditions as high O2 diffusivity limited denitrification. In the first week, nitrification contributed to NO emissions, which increased with increasing net N mineralization. Isotopocule mapping indicated that bacterial processes dominated N2O formation in litter-amended soil in the beginning of the incubation experiment with a subsequent shift towards fungal denitrification. With onset of anoxic incubation conditions after 47 days, N fluxes strongly increased, and heterotrophic bacterial denitrification became the main source of N2O. The N2O/(N2O+N2) ratio decreased with increasing litter C:N ratio and Corg:NO3− ratio in soil, confirming that the ratio of available C:N is a major control of denitrification product stoichiometry."],["dc.description.abstract","Returning crop residues to agricultural fields can accelerate nutrient turnover and increase N2O and NO emissions. Increased microbial respiration may lead to formation of local hotspots with anoxic or microoxic conditions promoting denitrification. To investigate the effect of litter quality on CO2, NO, N2O, and N2 emissions, we conducted a laboratory incubation study in a controlled atmosphere (He/O2, or pure He) with different maize litter types (Zea mays L., young leaves and roots, straw). We applied the N2O isotopocule mapping approach to distinguish between N2O emitting processes and partitioned the CO2 efflux into litter- and soil organic matter (SOM)-derived CO2 based on the natural 13C isotope abundances. Maize litter increased total and SOM derived CO2 emissions leading to a positive priming effect. Although C turnover was high, NO and N2O fluxes were low under oxic conditions as high O2 diffusivity limited denitrification. In the first week, nitrification contributed to NO emissions, which increased with increasing net N mineralization. Isotopocule mapping indicated that bacterial processes dominated N2O formation in litter-amended soil in the beginning of the incubation experiment with a subsequent shift towards fungal denitrification. With onset of anoxic incubation conditions after 47 days, N fluxes strongly increased, and heterotrophic bacterial denitrification became the main source of N2O. The N2O/(N2O+N2) ratio decreased with increasing litter C:N ratio and Corg:NO3− ratio in soil, confirming that the ratio of available C:N is a major control of denitrification product stoichiometry."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft"],["dc.description.sponsorship","Open-Access-Publikationsfonds 2021"],["dc.identifier.doi","10.3390/app11115309"],["dc.identifier.pii","app11115309"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/87882"],["dc.language.iso","en"],["dc.notes.intern","DOI Import DOI-Import GROB-441"],["dc.relation.eissn","2076-3417"],["dc.relation.orgunit","Abteilung Pflanzenernährung und Ertragsphysiologie"],["dc.rights","CC BY 4.0"],["dc.title","Carbon Availability and Nitrogen Mineralization Control Denitrification Rates and Product Stoichiometry during Initial Maize Litter Decomposition"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","197"],["dc.bibliographiccitation.journal","Soil Biology and Biochemistry"],["dc.bibliographiccitation.lastpage","207"],["dc.bibliographiccitation.volume","104"],["dc.contributor.author","Wu, D. I."],["dc.contributor.author","Senbayram, Mehmet"],["dc.contributor.author","Well, Reinhard"],["dc.contributor.author","Brueggemann, Nicolas"],["dc.contributor.author","Pfeiffer, Birgit"],["dc.contributor.author","Loick, Nadine"],["dc.contributor.author","Stempfhuber, Barbara"],["dc.contributor.author","Dittert, Klaus"],["dc.contributor.author","Bol, Roland"],["dc.date.accessioned","2018-11-07T10:29:36Z"],["dc.date.available","2018-11-07T10:29:36Z"],["dc.date.issued","2017"],["dc.description.abstract","The application of reactive nitrogen (N) in the form of synthetic/organic fertilizers plays a central role in supporting a larger human population, but also contributes to global warming through the emission of nitrous oxide (N2O). The use of nitrification inhibitors (Nls) has repeatedly been shown to minimize N2O emissions; however, their effectiveness in reducing N2O emissions varies greatly under different environmental conditions. A better understanding of how and to what extent NIs can mitigate fertilizer related soil-borne N2O emissions under a range of different conditions is required. In the present study, we carried out a soil incubation experiment in a fully automated continuous-flow incubation system under conditions favoring either nitrification- or denitrification-derived N2O emissions. Additionally, the abundance of AOB amoA, and AOA amoA genes was quantified and N2O isotopic signatures were analyzed. We mixed a common NI (PIADIN (R)) with mineral fertilizer (ammonium sulfate) and examined the N2O mitigation potential of the NI in a fertilized sandy soil (low denitrification potential) and a sandy soil mixed with wheat straw (high denitrification potential) at 70% water holding capacity (WHC). In non-NI treatments, the addition of straw led to a drastic increase of CO2 and N2O emissions compared to the non-straw-amended soils, suggesting stimulated microbial activity and higher denitrification rate. The NI reduced N2O emissions in the straw-amended treatment by 41%, whereas in the treatment without straw this was only 17%. With the combination of N2O isotopic signatures and functional gene abundances, fungal denitrification was considered to be the major process contributing to the higher N2O fluxes specifically in straw-amended soils. Overall, our study indicated that NI can be used as an effective method for mitigating N2O emissions in cropland specifically when the denitrification potential is high, e.g. in moist N-fertilized and straw-amended soils. (C) 2016 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.soilbio.2016.10.022"],["dc.identifier.isi","000389555900019"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/43673"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","0038-0717"],["dc.title","Nitrification inhibitors mitigate N2O emissions more effectively under straw-induced conditions favoring denitrification"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","217"],["dc.bibliographiccitation.issue","1-2"],["dc.bibliographiccitation.journal","Plant and Soil"],["dc.bibliographiccitation.lastpage","233"],["dc.bibliographiccitation.volume","459"],["dc.contributor.author","Rummel, Pauline Sophie"],["dc.contributor.author","Well, Reinhard"],["dc.contributor.author","Pfeiffer, Birgit"],["dc.contributor.author","Dittert, Klaus"],["dc.contributor.author","Floßmann, Sebastian"],["dc.contributor.author","Pausch, Johanna"],["dc.date.accessioned","2021-04-14T08:32:08Z"],["dc.date.available","2021-04-14T08:32:08Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1007/s11104-020-04750-7"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/83818"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-399"],["dc.relation.eissn","1573-5036"],["dc.relation.issn","0032-079X"],["dc.title","Nitrate uptake and carbon exudation – do plant roots stimulate or inhibit denitrification?"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1181"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Biogeosciences"],["dc.bibliographiccitation.lastpage","1198"],["dc.bibliographiccitation.volume","17"],["dc.contributor.author","Rummel, Pauline Sophie"],["dc.contributor.author","Pfeiffer, Birgit"],["dc.contributor.author","Pausch, Johanna"],["dc.contributor.author","Well, Reinhard"],["dc.contributor.author","Schneider, Dominik"],["dc.contributor.author","Dittert, Klaus"],["dc.date.accessioned","2020-12-10T18:47:53Z"],["dc.date.available","2020-12-10T18:47:53Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.5194/bg-17-1181-2020"],["dc.identifier.eissn","1726-4189"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/17766"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/78929"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Maize root and shoot litter quality controls short-term CO₂ and N₂O emissions and bacterial community structure of arable soil"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]