Land Use, Temperature, and Nitrogen Affect Nitrous Oxide Emissions in Amazonian Soils

Filho, Nauara M. Lage; Cardoso, Abmael da Silva; Azevedo, Jorge C. de; Faturi, Cristian; Silva, Thiago Carvalho da; Domingues, Felipe Nogueira; Ruggieri, Ana Cláudia; Reis, Ricardo Andrade; Rêgo, Aníbal Coutinho do

doi:10.3390/agronomy12071608

Cited by 4 publications

(3 citation statements)

References 52 publications

(79 reference statements)

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“…N 2 O emissions were observed without correlation with Ts (Figure 5c,f). Thus, this study's findings are inconsistent with other research [47,48], caused by low variation in Ts.…”

Section: Cumulative Ch4 and N2o Emissions And Gwpcontrasting

confidence: 99%

Effects of Water Management and Rice Varieties on Greenhouse Gas Emissions in Central Japan

Phungern,

Azizan,

Yusof

et al. 2023

Soil Systems

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Greenhouse gas (GHG) emissions from paddy fields depend on water management practices and rice varieties. Lysimeter experiments were conducted to determine the effect of rice varieties (lowland; Koshihikari (KH) and upland; Dourado Precoce (DP)) on GHG emissions under two water management practices: alternate wetting and drying (AWD) and continuous flooding (CF). A repeated cycle of drying and wetting in AWD irrigation was performed by drying the soil to −40 kPa soil matric potential and then rewetting. Consequently, the closed chamber method was used to measure direct emissions of methane (CH4), nitrous oxide (N2O), and carbon dioxide (CO2). The result revealed that water management significantly affected CH4 and N2O emissions (p < 0.05), while no significant effect was observed between different rice varieties. Although, AWD irrigation reduced CH4 emissions, it increased N2O emissions compared to CF irrigation, likely due to increased oxygen supply. AWD irrigation decreased GWP by 55.6% and 59.6% in KH and DP, respectively, compared to CF irrigation. Furthermore, CH4 and N2O emissions significantly correlated with soil redox potential and volumetric water content. These results suggest that AWD irrigation might be an effective water management method for mitigating GHG emissions from rice fields in central Japan.

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“…N 2 O emissions were observed without correlation with Ts (Figure 5c,f). Thus, this study's findings are inconsistent with other research [47,48], caused by low variation in Ts.…”

Section: Cumulative Ch4 and N2o Emissions And Gwpcontrasting

confidence: 99%

Effects of Water Management and Rice Varieties on Greenhouse Gas Emissions in Central Japan

Phungern,

Azizan,

Yusof

et al. 2023

Soil Systems

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“…Agricultural land use can alter the resilience of the ecosystem towards warming such as elevated N 2 O emissions demonstrated for the Amazon ( Lage Filho et al., 2022 ). We found a significant interaction of warming and reclamation on N 2 O flux primarily due to their interactions with soil moisture.…”

Section: Discussionmentioning

confidence: 99%

Reclamation intensifies the positive effects of warming on N2O emission in an alpine meadow

et al. 2023

Front. Plant Sci.

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Climatic warming can alter grassland nitrous oxide (N2O) emissions due to soil property alterations. However, how the reclamation affect grassland N2O flux under warming conditions remains unclear in alpine meadow ecosystems. We conducted a long-term manipulative warming experiment in a natural alpine meadow and a cultivated grassland on the Qinghai-Tibetan Plateau to explore the separate and interactive effects of warming and reclamation on the soil N2O emission flux. N2O fluxes were measured under four treatments including control (CK), warming (W), reclamation (R) and warming under reclamation (WR) from August 2018 to July 2019. We measured the content of soil C, N nutrients and 5 enzymatic activities in 2018 and 2019. Correlation analysis and structural equation modeling were used to clarify how soil N availability and soil enzyme activities affect N2O emission. Our results indicated that compared to the ambient conditions for the growing and non-growing seasons, soil N2O flux was significantly increased 59.1% and 152.0% by warming and 28.4% and 142.4% by reclamation, respectively. Compared with W, WR significantly increased N2O flux by 18.9% and 81.1% during the growing and non-growing seasons, respectively. Soil moisture was negatively correlated to enzymatic activity and N2O flux. Both warming and reclamation promoted soil nitrification by increasing related enzymatic activities that acted to increase the N2O flux. Reclamation resulted in a greater sensitivity of the activity of ammonia monooxygenase and hydroxylamine oxidoreductase to warming, thus enhancing the effects of warming on increasing the N2O flux. Our research indicated that reclamation can additionally increase the effects of warming on N2O emissions for alpine meadows. Therefore, excessive expansion of arable land should be avoided, and new reclamation sites should be planned scientifically, as warming is expected to intensify in the future.

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“…Nitrifier denitrification was the cri-tical process dominating N 2 O production at high soil moisture levels (70% WFPS). Lage Filho et al (2022) assessed the impact of land use, temperature, and nitrogen on N 2 O emissions in Amazon soils. To this end, three randomized, five-replication treatments were conducted to quantify N 2 O emissions: (1) three different land uses (tropical rainforest, grassland, and agriculture); (2) different temperatures (25, 30, 35 and 40 °C); and (3) different soil nitrogen application (0, 90, 180 and 270 kg N/ha).…”

Section: Introductionmentioning

confidence: 99%

Modelling of the impact of climate change on the transformation of nitrogen forms in the soil and N2O emissions from the agroecosystems of Eastern Ukraine

Polevoy,

Mykytiuk,

Bozhko

et al. 2023

Regul. Mech. Biosyst.

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The moisture-temperature regime influences the nitrogen status of the soil and the microbiological processes of the transformation of nitrogen forms. Therefore, we assumed that ongoing climate change may affect the emission of nitrous oxide N2O, which is formed in the course of the transformation of nitrogen forms in the soil and is one of the most aggressive greenhouse gases that determine the global warming potential. To test this hypothesis and make a quantitative assessment of the impact of climate change on the transformation of nitrogen forms in the soil and N2O emissions from the agroecosystem soils, we used a complex model of greenhouse gas emissions from an agroecosystem soil that we developed and the RCP4.5 climate change scenario. The research was performed for the chernozem soils of Eastern Ukraine, with winter wheat being the cultivated crop. ‘Dry’ and ‘wet’ years typical for the period of 2021–2050 were selected among climate conditions in accordance with the climate change scenario. A ‘dry’ year was considered to be a year with a precipitation of 60% or less of the long-term average, a ‘wet’ year was a year with a precipitation of 130% or more of the long-term average for the studied period. The level of ammonification during the growing season for both ‘dry’ and partially ‘wet’ years was mainly controlled by temperature. At the beginning of the period, at negative temperatures below –3 °C ammonification and nitrification almost stopped, and at temperatures above –2 °C they slightly increased. Indices for the intensity of these processes increased with a rise in temperature from 0 °C to 10–11 °C. In the conditions of a ‘dry’ year an increment in temperature to the level of 22.4–27.8 °C caused a sharp increase in the rate of ammonification and caused a high level of the rate of nitrification. For the conditions of a ‘wet’ year with a sufficiently low (compared to a ‘dry’ year) temperature regime, a relatively significant rise in temperature with still quite good humidification increased the intensity of the ammonification process. The dependence of the intensity of the ammonification and nitrification processes on the moisture reserves in the soil is traced. The high level of moisture reserves in the arable layer at the beginning of the growing season in both ‘dry’ and ‘wet’ years formed anaerobic conditions in the upper layer of the soil. Against the background of rising temperatures, this called forth the denitrification process. N2O emission was 0.03–0.29 g N-N2O/ha•day due to the denitrification process in a ‘dry’ year, and 0.7–5.2 g N-N2O/ha•day in a ‘wet’ year. The highest level of N2O emission due to nitrification was observed in a ‘dry’ year in the middle of the vegetation period at high temperatures (22.7–27.8 °С) and amounted to 8.2–11.2 g N-N2O/ha•day. A decrease in soil moisture reserves during the second half of the growing season reduced the level of N2O emissions. Nitrification was the main process producing N2O. The emissions of N2O with moisture reserves greater than 55 mm in the arable layer occurred due to denitrification. A rise in temperature increases the level of N2O emissions. The peculiarities of the influence of moisture and temperature conditions of ‘dry’ and ‘wet’ years on the processes of ammonification, nitrification, denitrification, and N2O emissions from chernozem soils according to the RCP4.5 climate change scenario in Eastern Ukraine were assessed.

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Land Use, Temperature, and Nitrogen Affect Nitrous Oxide Emissions in Amazonian Soils

Cited by 4 publications

References 52 publications

Effects of Water Management and Rice Varieties on Greenhouse Gas Emissions in Central Japan

Effects of Water Management and Rice Varieties on Greenhouse Gas Emissions in Central Japan

Reclamation intensifies the positive effects of warming on N2O emission in an alpine meadow

Modelling of the impact of climate change on the transformation of nitrogen forms in the soil and N2O emissions from the agroecosystems of Eastern Ukraine

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