Soil N2O fluxes in integrated production systems, continuous pasture and Cerrado

Carvalho, Arminda Moreira de; Oliveira, Wesley Rodrigues de; Ramos, Maria Lucrécia Gerosa; Coser, Thais Rodrigues; Oliveira, Alexsandra Duarte de; Pulrolnik, K.; Souza, Kleberson Worslley de; Vilela, Lourival; Marchão, Robélio Leandro

doi:10.1007/s10705-017-9823-4

Cited by 33 publications

(29 citation statements)

References 60 publications

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“…This is attributed to the very low amount of NO 3 and to the predominant N form (NH 4 + ) ( Figures 3B and 3C) that did not induce high N 2 O emissions. These results were similar to previous descriptions in studies on Oxisols under native Cerrado vegetation, which reported few measurements above 10 µg m -2 h -1 and average fluxes between 0.6 and 16 µg N 2 O m -2 h -1 (Siqueira- Neto et al, 2011;Santos et al, 2016;Carvalho et al, 2017).…”

Section: Temporal Variability Of Ch 4 and N 2 O Fluxes And Environmensupporting

confidence: 92%

“…In this study, no environmental variable stood out as an environmental drive, despite variables with relevant effects on N 2 O emissions in agricultural systems found by our research group (Santos et al, 2016;Carvalho et al, 2017;Sato et al, 2017). Therefore, these results indicate that the lack of consistent environmental effects may be due to both the intrinsic low GHS emission and the high spatial/temporal variability of native and cultivated forest environments in the Cerrado.…”

Section: Temporal Variability Of Ch 4 and N 2 O Fluxes And Environmenmentioning

confidence: 43%

“…In general, when good drainage conditions, which reduce WFPS (Baggs and Philippot, 2010), are combined to a low relative NO 3 production, the mineral N concentrations rarely exceed the N demand of microorganisms and plant roots (Martins et al, 2015b). Although several studies reported correlations between GHGs and mineral N in the soil (Siqueira-Neto et al, 2011;Santos et al, 2016;Carvalho et al, 2017), and in this study, some correlations between these N forms and gas fluxes were also observed, the gas emission pulses did not occur synchronously with the highest NO 3 and NH 4 + concentrations, which may have reduced the significance of relations.…”

Section: Temporal Variability Of Ch 4 and N 2 O Fluxes And Environmenmentioning

confidence: 99%

“…Land-use changes alter chemical, physical, and biological properties of the soil, modifying the GHG fluxes (Kim and Kirschbaum, 2015). In addition, forest type (Masaka et al, 2014) and soil management practices play an important role (Kim et al, 2016), as well as water-filled pore space (Santos et al, 2016;Smith, 2017), soil O 2 contents, pH, plants, and N input (Hickman et al, 2015;Carvalho et al, 2017). Moreover, long-term N inputs may favor soil C stocks, mainly in litter with a high lignin content (Grandy and Neff, 2008).…”

Section: Introductionmentioning

confidence: 99%

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CH4 and N2O fluxes from planted forests and native Cerrado ecosystems in Brazil

Oliveira

Ribeiro

Ferreira

et al. 2021

Sci. agric. (Piracicaba, Braz.)

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Forest soils are N 2 O sources and commonly act as CH 4 sinks. This study evaluated the dynamics of the CH 4 and N 2 O fluxes of soils under Eucalyptus plantations and native Cerrado vegetation, as well as possible interactions between environmental factors and fluxes. The study was carried out in the Distrito Federal, Brazil, during 26 months, in three areas: in two stands of the hybrid Eucalyptus urophylla × Eucalyptus grandis, planted in 2011 (E1), and in 2009 (E2) and native Cerrado vegetation (CE). Measurements to determine the fluxes in a closed static chamber were carried out from Oct 2013 to Nov 2015. Soil and climate factors were monitored. During the study period, the mean CH 4 fluxes were-22.48,-8.38 and-1.31 μg CH 4 m-2 h-1 and the mean N 2 O fluxes 5.45, 4.85 and 3.85 μg N 2 O m-2 h-1 from E1, E2 and CE, respectively. Seasonality affected plantations in the studied sites. Cumulative CH 4 influxes were calculated (year-1:-1.86 to-0.63 kg ha-1 yr-1 ; year-2:-1.85 to-1.34 kg ha-1 yr-1). Cumulative N 2 O fluxes in the three sites were ≤ 0.85 kg ha-1 yr-1. The change in land use from Cerrado to Eucalyptus plantations did not significantly changed regarding greenhouse gases (GHG), compared to the native vegetation. Flux rates of both gases (N 2 O and CH 4) were low. Temporal variations in GHG fluxes and different ages of the stands did not cause significant differences in cumulative annual fluxes.

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Section: Temporal Variability Of Ch 4 and N 2 O Fluxes And Environmensupporting

confidence: 92%

Section: Temporal Variability Of Ch 4 and N 2 O Fluxes And Environmenmentioning

confidence: 43%

Section: Temporal Variability Of Ch 4 and N 2 O Fluxes And Environmenmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

CH4 and N2O fluxes from planted forests and native Cerrado ecosystems in Brazil

Oliveira

Ribeiro

Ferreira

et al. 2021

Sci. agric. (Piracicaba, Braz.)

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“…From these results, especially those from the Cerrado conditions (Carvalho et al, 2017;Santos et al, 2016), it is possible to establish the hypothesis that the accumulation of C in the most stable SOM fractions, with greater physical and chemical protection, would result in smaller N 2 O emissions from soil. In addition, understanding the role of SOM fractions resulting from management practices in N 2 O emissions is fundamental in the quest to mitigate GHGs and adapt cropping systems to changes in climate.…”

Section: Introductionmentioning

confidence: 99%

Understanding the relations between soil organic matter fractions and N₂O emissions in a long‐term integrated crop–livestock system

Sato

Figueiredo

Marchão

et al. 2019

European J Soil Science

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The nitrous oxide (N2O) emissions in agricultural systems are influenced by edaphoclimatic conditions, and the availability of soil organic matter (SOM) is a key factor. The objective of this study was to evaluate the accumulation of labile and stable SOM fractions and possible relations with N2O emissions using a multivariate approach in a 24‐year integrated crop–livestock experiment in the Cerrado region. The management systems consisted of: continuous cropping under no tillage (CC‐NT), continuous cropping under annual heavy disc harrow (CC‐CT), an integrated crop–livestock system under no tillage (CLS‐NT) and an adjacent area of native Cerrado as reference. The cumulative N2O emissions were quantified over a period of 146 days throughout the cultivation of sorghum (Sorghum bicolor (L.) Moench). Labile and stable soil carbon (C) fractions and C contents in classes of aggregates (macroaggregates >0.250 mm and microaggregates <0.250 mm) were determined. The cumulative N2O emissions were larger in the CC‐CT system, intermediate in the CC‐NT and CLS‐NT systems, and smaller in the Cerrado. The decomposition of crop residues during the crop succession (first and second crop seasons) and the presence of a grass forage (with grazing and not grazed) in both systems (CLS‐NT and CC‐NT, respectively) explain the differences in N2O fluxes between the land uses. Smaller cumulative N2O emissions were observed in the integrated system (CLS‐NT), which could be attributed to the greatest increase in soil C in its most stable SOM fractions (fulvic acid) and occlusion in microaggregates. This confirms the hypothesis that the accumulation of C in the most stable SOM fractions of the soil, unavailable to the microbiota, results in smaller N2O emissions. Principal component analysis also revealed that aggregation is a key attribute that correlates with soil N2O emissions. Thus, conservation systems such as CLS‐NT had larger average diameter of aggregates and the smallest N2O emissions among the agroecosystems. Highlights Relations between SOM fractions and N2O emissions were studied in integrated systems The accumulation of stabilized C fractions reduces N2O emissions Soil structure (aggregation) and SOM stability partially explain N2O fluxes Integrated crop–livestock promotes better soil conditions, reducing N2O emissions

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Crop-Livestock-Forest Integration Systems as a Sustainable Production Strategy in Brazil

Rodrigues

Ferreira

Silveira

et al. 2023

Environment &Amp; Policy

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Soil N2O fluxes in integrated production systems, continuous pasture and Cerrado

Cited by 33 publications

References 60 publications

CH4 and N2O fluxes from planted forests and native Cerrado ecosystems in Brazil

CH4 and N2O fluxes from planted forests and native Cerrado ecosystems in Brazil

Understanding the relations between soil organic matter fractions and N₂O emissions in a long‐term integrated crop–livestock system

Crop-Livestock-Forest Integration Systems as a Sustainable Production Strategy in Brazil

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Soil N2O fluxes in integrated production systems, continuous pasture and Cerrado

Cited by 33 publications

References 60 publications

CH4 and N2O fluxes from planted forests and native Cerrado ecosystems in Brazil

CH4 and N2O fluxes from planted forests and native Cerrado ecosystems in Brazil

Understanding the relations between soil organic matter fractions and N2O emissions in a long‐term integrated crop–livestock system

Crop-Livestock-Forest Integration Systems as a Sustainable Production Strategy in Brazil

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Product

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Understanding the relations between soil organic matter fractions and N₂O emissions in a long‐term integrated crop–livestock system