Emissions of CH4, CO2, and N2O from soil at a cattle overwintering area as affected by available C and N

Šimek, Miloslav; Hynšt, Jaroslav; Šimek, Pavel

doi:10.1016/j.apsoil.2013.10.010

Cited by 11 publications

(3 citation statements)

References 37 publications

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“…Crop residues are a source of labile C and N. The addition of labile C may intensify N 2 O production through denitrification due to O 2 consumption by decomposer bacteria resulting in anaerobic sites ( Šimek et al, 2014). In our study, the effect of labile C addition on N 2 O production may have been an important factor in both soil moisture conditions.…”

Section: Discussionmentioning

confidence: 99%

Soil N₂O emissions following cover‐crop residues application under two soil moisture conditions

Pimentel

Weiler

Pedroso

et al. 2015

J. Plant Nutr. Soil Sci.

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Cover crops in rotation or intercropped with annual crops are important strategies to increase C and N input in agricultural soils. However, these practices may also enhance soil N 2 O emissions. The effect on N 2 O emissions may be dependent upon the biochemical composition of cover crop residues. A 47-d incubation study was conducted to determine soil N 2 O emissions following the addition of residues from three summer legume species [pigeon pea (Cajanus cajan L. Millsp.), cowpea (Vigna unguiculata L. Walp.), lablab bean (Lablab purpureus)], one winter legume [vetch (Vicia sativa L.)], one winter monocotyledon [black oat (Avena strigosa Schreb.)], and maize (Zea mays L.) under two water-filled pore space levels (40 and 70% WFPS). Short-term peaks of N 2 O fluxes were observed after the addition of all crop residues, but were much greater under 70 than 40% WFPS (5.2 and 5133 μg N-N 2 O kg -1 soil for 40 and 70% WFPS, respectively). Under both WFPS, significantly higher peaks were detected after the application of N-rich legume residues (7.7 and 3,356 μg N-N 2 O kg -1 soil under 40 and 70% WFPS, respectively) than after the application of grass residues (2.8 and 1,777 μg N-N 2 O kg -1 soil under 40 and 70% WFPS, respectively). Cumulative soil N 2 O produced under 70% WFPS was approx. 110 times greater than under 40% WFPS. Soil N 2 O emissions increased linearly as residue N content increased. Soil N 2 O emissions also increased linearly as the content of the recalcitrant compounds lignin and polyphenols increased, because residues with high N content also had high lignin and polyphenols content. When the content of C and recalcitrant compounds were expressed on an N basis, soil N 2 O emission decreased linearly as residue C/N, lignin/N, polyphenol/N, and (lignin + polyphenols)/N ratios increased. Indices that include recalcitrant compounds on N basis may be useful for the selection of cover-crop species with the least impact on soil N 2 O emissions. However, our results show that these ratio indices had similar correlation coefficients compared to C/N ratio, indicating that C/N ratio is an efficient index to predict soil N 2 O emission following cover crop application.

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Section: Discussionmentioning

confidence: 99%

Soil N₂O emissions following cover‐crop residues application under two soil moisture conditions

Pimentel

Weiler

Pedroso

et al. 2015

J. Plant Nutr. Soil Sci.

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“…To reduce differences between observed and simulated fluxes, the timing of measurement was approximated to represent the average daily flux. However, this is difficult in practice and theory due to the inherent variability of the diurnal emissions cycles [64][65][66].…”

Section: Co 2 Emissions and Swcmentioning

confidence: 99%

Closing the N-Budget: How Simulated Groundwater-Borne Nitrate Supply Affects Plant Growth and Greenhouse Gas Emissions on Temperate Grassland

et al. 2018

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European groundwater reservoirs are frequently subject to reactive nitrogen pollution (Nr) owing to the intensive use of nitrogen (N) fertilizer and animal manure in agriculture. Besides its risk on human health, groundwater Nr loading also affects the carbon (C) and N cycle of associated ecosystems. For a temperate grassland in Germany, the long-term (12 years) annual average exports of Nr in form of harvest exceeded Nr inputs via fertilization and deposition by more than 50 kgN ha−1. We hypothesize that the resulting deficit in the N budget of the plant-soil system could be closed by Nr input via the groundwater. To test this hypothesis, the ecosystem model LandscapeDNDC was used to simulate the C and N cycle of the respective grassland under different model setups, i.e., with and without additional Nr inputs via groundwater transport. Simulated plant nitrate uptake compensated the measured N deficit for 2 of 3 plots and lead to substantial improvements regarding the match between simulated and observed plant biomass and CO2 emission. This suggests that the C and N cycle of the investigated grassland were influenced by Nr inputs via groundwater transport. We also found that inputs of nitrate-rich groundwater increased the modelled nitrous oxide (N2O) emissions, while soil water content was not affected.

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“…For example, studies showed that nitrogen deposition stimulated N 2 O emission Zhang et al, 2014], which partially canceled out the stimulating impact on CO 2 uptake [Niu et al, 2010;Niu et al, 2009;Volk et al, 2011]; few other studies found that nitrogen addition stimulated CH 4 flux in semiarid grasslands [Chen et al, 2013;Li et al, 2012;Louro et al, 2013;Šimek et al, 2014;Stiehl-Braun et al, 2011;Zhang et al, 2014]; manipulative experiments found that increased precipitation enhanced ecosystem CO 2 uptake through its stimulating effect on gross primary production [Chimner et al, 2010;Nagy et al, 2007;Yan et al, 2011]. For CH 4 uptake, the impact of water addition could be inhibition [Blankinship et al, 2010b;Liu and Greaver, 2009], neutral [Liu and Greaver, 2009;Mariko et al, 2007], or stimulating [Blankinship et al, 2010a;Xu et al, 2015]; while for N 2 O emission, the impact of water addition could be stimulating [Horváth et al, 2010;Zhang and Han, 2008] or neutral [Liu and Greaver, 2009;Unteregelsbacher et al, 2013] in semiarid grassla nds.…”

Section: Introductionmentioning

confidence: 99%

Interactive impacts of nitrogen input and water amendment on growing season fluxes of CO2, CH4, and N2O in a semiarid grassland, Northern China

Zhang

Hou

Guo

et al. 2017

Science of The Total Environment

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Nitrogen and water are two important factors influencing GHG (primarily CO - carbon dioxide; CH - methane, and NO - nitrous oxide) fluxes in semiarid grasslands. However, the interactive effects of nitrogen and water on GHG fluxes remain elusive. A 3-year (2010-2012) manipulative experiment was conducted to investigate the individual and interactive effects of nitrogen and water additions on GHG fluxes during growing seasons (May to September) in a semiarid grassland in Northern China. Accumulated throughout growing seasons, nitrogen input stimulated CO uptake by 3.3±1.0gCm (gN), enhanced NO emission by 1.2±0.3mgNm (gN), and decreased CH uptake by 5.2±0.9mgNm (gN); water amendment stimulated CO uptake by 0.2±0.1gCm (mmHO) and NO emission by 0.2±0.02mgNm (mmHO), decreased CH uptake by 0.3±0.1mgCm (mmHO). A synergistic effect between nitrogen and water was found on NO flux in normal year while the additive effects of nitrogen and water additions were found on CH and CO uptakes during all experiment years, and on NO emission in dry years. The nitrogen addition had stronger impacts than water amendment on stimulating CH uptake in the normal year, while water was the dominant factor affecting CH uptake in dry years. For NO emission, the N-stimulating impact was stronger in un-watered than in watered plots, and the water-stimulating impact was stronger in non-fertilized than in fertilized treatments in dry years. The interactive impacts of nitrogen and water additions on GHG fluxes advance our understanding of GHG fluxes in responses to multiple environmental factors. This data source could be valuable for validating ecosystem models in simulating GHG fluxes in a multiple factors environment.

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Emissions of CH4, CO2, and N2O from soil at a cattle overwintering area as affected by available C and N

Cited by 11 publications

References 37 publications

Soil N₂O emissions following cover‐crop residues application under two soil moisture conditions

Soil N₂O emissions following cover‐crop residues application under two soil moisture conditions

Closing the N-Budget: How Simulated Groundwater-Borne Nitrate Supply Affects Plant Growth and Greenhouse Gas Emissions on Temperate Grassland

Interactive impacts of nitrogen input and water amendment on growing season fluxes of CO2, CH4, and N2O in a semiarid grassland, Northern China

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Emissions of CH4, CO2, and N2O from soil at a cattle overwintering area as affected by available C and N

Cited by 11 publications

References 37 publications

Soil N2O emissions following cover‐crop residues application under two soil moisture conditions

Soil N2O emissions following cover‐crop residues application under two soil moisture conditions

Closing the N-Budget: How Simulated Groundwater-Borne Nitrate Supply Affects Plant Growth and Greenhouse Gas Emissions on Temperate Grassland

Interactive impacts of nitrogen input and water amendment on growing season fluxes of CO2, CH4, and N2O in a semiarid grassland, Northern China

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Soil N₂O emissions following cover‐crop residues application under two soil moisture conditions

Soil N₂O emissions following cover‐crop residues application under two soil moisture conditions