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Campo DC | Valor | Idioma |
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dc.contributor.author | Langenhove, Leandro van | - |
dc.contributor.author | Depaepe, Thomas | - |
dc.contributor.author | Verryckt, Lore T. | - |
dc.contributor.author | Vallicrosa, Helena | - |
dc.contributor.author | Fuchslueger, Lucia | - |
dc.contributor.author | Lugli, Laynara F. | - |
dc.contributor.author | Bréchet, Laëtitia M. | - |
dc.contributor.author | Ogaya, Romà | - |
dc.contributor.author | Llusiá, Joan | - |
dc.contributor.author | Urbina, Ifigenia | - |
dc.contributor.author | Gargallo-Garriga, Albert | - |
dc.contributor.author | Grau, Oriol | - |
dc.contributor.author | Richter, Andreas A. | - |
dc.contributor.author | Penuelas, Josep | - |
dc.contributor.author | Van Der Straeten, Dominique | - |
dc.contributor.author | Janssens, Ivan A. | - |
dc.date.accessioned | 2021-08-25T15:13:25Z | - |
dc.date.available | 2021-08-25T15:13:25Z | - |
dc.date.issued | 2021 | - |
dc.identifier.uri | https://repositorio.inpa.gov.br/handle/1/37999 | - |
dc.description.abstract | In tropical forests, free-living Biological nitrogen (N) fixation (BNF) in soil and litter tends to decrease when substrate N concentrations increase, whereas increasing phosphorus (P) and molybdenum (Mo) soil and litter concentrations have been shown to stimulate free-living BNF rates. Yet, very few studies explored the effects of adding N, P, and Mo together in a single large-scale fertilization experiment, which would teach us which of these elements constrain or limit BNF activities. At two distinct forest sites in French Guiana, we performed a 3-year in situ nutrient addition study to explore the effects of N, P, and Mo additions on leaf litter and soil BNF. Additionally, we conducted a short-term laboratory study with the same nutrient addition treatments (+N, +N+P, +P, +Mo, and +P+Mo). We found that N additions alone suppressed litter free-living BNF in the field, but not in the short-term laboratory study, while litter free-living BNF remained unchanged in response to N+P additions. Additionally, we found that P and P+Mo additions stimulated BNF in leaf litter, both in the field and in the lab, while Mo alone yielded no changes. Soil BNF increased with P and P+Mo additions in only one of the field sites, while in the other site soil BNF increased with Mo and P+Mo additions. We concluded that increased substrate N concentrations suppress BNF. Moreover, both P and Mo have the potential to limit free-living BNF in these tropical forests, but the balance between P versus Mo limitation is determined by site-specific characteristics of nutrient supply and demand. © 2021. American Geophysical Union. All Rights Reserved. | en |
dc.relation.ispartof | Volume 126, Número 126 | pt_BR |
dc.subject | 15N2 calibration | pt_BR |
dc.subject | acetylene reduction assay | pt_BR |
dc.subject | cross-site comparison | pt_BR |
dc.subject | feld fertilization | pt_BR |
dc.subject | molybdenum | pt_BR |
dc.subject | phosphorus | pt_BR |
dc.title | Impact of Nutrient Additions on Free-Living Nitrogen Fixation in Litter and Soil of Two French-Guianese Lowland Tropical Forests | pt_BR |
dc.type | Artigo | pt_BR |
dc.identifier.doi | 10.1029/2020JG006023 | - |
dc.publisher.journal | Journal of Geophysical Research: Biogeosciences | en |
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