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Absence of the nitrous oxide reductase gene cluster in commercial alfalfa inoculants is probably due to the extensive loss of genes during rhizobial domestication
(Springer, 2018-08)As other legume crops, alfalfa cultivation increases the emission of the greenhouse gas nitrous oxide (N2O). Since legumesymbiotic nitrogen-fixing bacteria play a crucial role in this emission, it is important to understand ... -
Aporte de la fijación biológica de nitrógeno a la emisión de N2O desde el suelo con cultivo de soja = Contribution of biological nitrogen fixation to N2O emission from soil under soybean
(Asociación Argentina de la Ciencia del Suelo, 2015)El óxido nitroso (N2O) es el principal gas de efecto invernadero emitido desde el sector agrícola y su producción biológica en los suelos se genera por dos vías, la nitrificación y la desnitrificación. Recientemente el ... -
CO2 and N2O flux balance on soybean fields during growth and fallow periods in the Argentine Pampas—A study case
(Elsevier, 2017-06)The estimation of the GHG balance of agroecosystems is essential to evaluate the impact of agriculture on the composition of the atmosphere. Cultivated soils may act as a sink or a source of CO2 and usually emit N2O. The ... -
Comparison of field measurement methods of nitrous oxide soil emissions: from the chamber to the vial
(Sociedade Brasileira de Ciencia do Solo, 2020-07-16)Nitrous oxide (N2O) is a greenhouse gas that contributes substantially to global climate change. The N2O soil emissions have a large uncertainty because of its low atmospheric concentration levels and enormous spatial and ... -
Cover crop species affect N2O emissions at hotspot moments of summer crops
(Frontiers Media, 2022-06-01)The use of cover crops, combined with low N fertilization and no-tillage, reduces theenvironmental impacts of agriculture. Legume cover crops provide N to the agroecosystem and allow N fertilization to be reduced without ... -
Effects of fertilizer type on nitrous oxide emission and ammonia volatilization in wheat and maize crops
(Wiley, 2022-01-28)About half of the applied nitrogen (N) is not consumed by crops, causing environmental and economic costs. This N can be lost as ammonia (NH3) volatilization, nitrous oxide (N2O) emission or leaching, among others. This ... -
Emisiones de óxido nitroso desde suelos agrícolas y alternativas para mitigarlas
(Asociación Argentina para el Progreso de las Ciencias, 2018)El óxido nitroso (N2O) es un gas efecto invernadero con un poder de calentamiento equivalente a 296 veces mayor que el del dióxido de carbono (CO2). El N2O es producido a partir del nitrógeno mineral que entra a los ... -
Emisión de óxido nitroso en secuencias de cultivos con diferente participación de soja en siembra directa
(Universidad Nacional de Luján, 2018-09)El N-N2O es uno de los principales gases de efecto invernadero y su potencial de calentamiento es aproximadamente 300 veces superior a la del CO2. Se emite desde el suelo debido los procesos microbianos de nitrificación y ... -
Evaluation of nitrous oxide emission by soybean inoculated with Bradyrhizobium strains commonly used as inoculants in South America
(Springer, 2022-01-13)Aims The purpose of this work was to analyze the agronomic and environmental performance of soybean plants inoculated with the Bradyrhizobium strains widely used as soybean biofertilizers in South America and to determine ... -
Hierarchy of factors driving N2O emissions in non‐tilled soils under different crops
(Wiley, 2013-10)Nitrous oxide (N2O) is emitted to the atmosphere as a by‐product of nitrification and denitrification by soil microbial processes. Differences in climate, soil and management regulate these processes, causing N2O emissions ... -
Impact of land use during winter on the balance of greenhouse gases
(Wiley, 2018)The increase in atmospheric greenhouse gases (GHGs) can be mitigated by capturing CO2 from the atmosphere and/or by reducing their emissions. Replacing winter intercrop fallow by cover crops (CCs) can sequester carbon and ... -
Nitrous oxide emission estimation from managed soils in Argentina: Differences between IPCC 2006 guidelines and the IPCC 2019 refinemet
(Facultad de Agronomía, Universidad de Buenos Aires, 2022-10-01)Based on the IPCC 2006 guidelines, the total GHG emission for 2016, in Argentina, were estimated to reach a total net 364 MtCO2eq. Particularly, N2O emissions from managed soils sector represented 12% of total emissions. ... -
Nitrous oxide emissions from a typical argiudol soil with organic and chemical amendments = Emisiones de óxido nitroso desde un suelo argiudol típico con enmiendas orgánicas y químicas
(Asociación Argentina de la Ciencia del Suelo, 2022-06-01)Diversification in fertilizer sources will be necessary to meet the growing demand for food worldwide. For this reason, organic amendments emerge as a synthetic fertilizers alternative. Composting organic waste stabilizes ... -
Riparian buffer strips influence nitrogen losses as nitrous oxide and leached N from upslope permanent pasture
(Elsevier, 2022-05-23)Riparian buffer strips can have a significant role in reducing nitrogen (N) transfers from agricultural land to freshwater primarily via denitrification and plant uptake processes, but an unintended trade-off can be elevated ... -
Soil nitrous oxide emissions from Eucalyptus plantation in Argentina
(Elsevier, 2020-10-01)Nitrous oxide has a key effect on global climate development and 53% of N2O total annual emissions are related to fluxes from the soil. Land use and soil characteristics affect N2O emissions. There are not enough assessments ... -
Soybean in rotation with cereals attenuates nitrous oxide emissions as compared with soybean monoculture in the Pampas region
(Elsevier, 2021-11)Nitrous oxide (N-N2O) emissions in the agricultural sector represent ca. 25% of total N-N2O emissions on a global scale. In Argentina, information on agricultural emissions is scarce, and thus, N-N2O emissions are estimated ... -
Spontaneous Mutations in the Nitrate Reductase Gene napC Drive the Emergence of Eco-friendly Low-N2O-Emitting Alfalfa Rhizobia in Regions with Different Climates
(Springer, 2020)We have recently shown that commercial alfalfa inoculants (e.g., Sinorhizobium meliloti B399), which are closely related to the denitrifier model strain Sinorhizobium meliloti 1021, have conserved nitrate, nitrite, and ...