N2O and CH4 fluxes in potato fields: automated measurement, management effects and temporal variation

Flessa, Heinz; Ruser, Reiner; Schilling, Rolf; Loftfield, Norman; Munch, Jean Charles; Kaiser, Ernst‐August; Beese, F.

doi:10.1016/s0016-7061(01)00110-0

Cited by 137 publications

(86 citation statements)

References 29 publications

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“…Our cumulative emissions were slightly lower than mean data from papers on Mediterranean environment reported in the review of Aguilera et al (2013) on annual basis (700 g N-N2O ha -1 y -1 ). Flessa et al (2002) in a temperate climate reported cumulative N-N2O higher than our value, around 2 kg N-N2O ha -1 y -1 from lupine. The same author observed that cumulative emissions from lupine were lower than emissions from fertilized crops in the same area but highlighted that the ploughing of a clover field after the harvest had a negative effect on the growing period of the subsequent crop enhancing emissions (7-12 kg N-N2O ha -1 y -1 ), probably due to the mineralization of biologically N fixed residue and the increased microbial respiration.…”

Section: Discussioncontrasting

confidence: 89%

Nitrous Oxide Emissions from Clover in the Mediterranean Environment

Volpi¹,

Bosco²,

Nasso³

et al. 2016

Italian Journal of Agronomy

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Introducing nitrogen N2-fixing crops into cereal-based crop rotations reduces N-fertiliser use and may mitigate soil emissions of nitrous oxide (N2O). However, the effect of the cultivation of N2-fixing crops on N2O emissions is still not well understood. N2O from N2-fixing crops can be emitted in two ways: during biological N2 fixation itself and when legume residues are returned to the soil. A field trial was carried out on clover (Trifolium squarrosum Savi) to test the role of leguminous crops on N2O emissions in the Mediterranean environment. Monitoring was performed from December 2013 to September 2014. Cumulated N-N2O fluxes were calculated for the growing season (Phase 1) and the post-harvest period (Phase 2) in order to assess the importance of each phase. Our results did not show statistically significant differences between the two phases in term of contribution to the total cumulative N-N2O emissions, in fact Phase 1 and Phase 2 accounted respectively for 43 and 57% of the total.

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Section: Discussioncontrasting

confidence: 89%

Nitrous Oxide Emissions from Clover in the Mediterranean Environment

Volpi¹,

Bosco²,

Nasso³

et al. 2016

Italian Journal of Agronomy

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“…Therefore, the high N 2 O emissions at harvest may reflect increased carbon availability primarily associated with rewetting of soil after an extended dry period and possibly also due to increased carbon availability associated with root death at crop maturity. Previous studies have also reported increased N 2 O emissions at times when soil carbon availability would be expected to increase including after re-wetting of dry soil (Ruser et al 2006), following harvest of soybeans , after topkill of potatoes (Flessa et al 2002) and after incorporation of crop residues (Baggs et al 2000). These findings highlight the importance of both soil …”

Section: Zebarth Et Al * Nitrous Oxide Emissions From Barley 201mentioning

confidence: 55%

N₂O emissions from spring barley production as influenced by fertilizer nitrogen rate

Zebarth¹,

Rochette²,

Burton³

2008

Can. J. Soil. Sci.

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(1 N when fertilizer N rate was increased from 0 to 75 kg N ha(1 and from 75 to 150 kg N ha (1 , respectively, indicating increased N 2 O emissions when fertilizer is applied at above optimal rates. N 2 O emissions increased linearly with nitrate intensity, the summation of daily NO 3 -N concentrations for 0-to 15-cm depth. This suggests that the non-linearity in the relationship between fertilizer N rate and N 2 O emissions can be explained by the decreasing efficiency in crop NO 3 -N uptake at high fertilizer N rates. Les auteurs attribuent les fortes e´missions de N 2 O observe´es a`ce moment a`une plus grande disponibilite´du carbone conse´cutivement a`l'humidification du sol sec. Il se pourrait donc que l'incidence de la fertilisation azote´e sur les de´gagements de N 2 O ne se fasse pas sentir imme´diatement apre`s l'application. Ceci montre bien qu'il importe de mesurer les e´missions de N 2 O en dehors de la pe´riode ve´ge´tative. Les e´missions cumulatives de N 2 O induites par l'engrais s'e´tablissaient en moyenne a`0,011 et a`0,021 kg de N par kg de N quand le taux d'application de l'engrais azote´passe de 0 a`75 kg de N par hectare ou de 75 a`150 kg de N par hectare, respectivement, ce qui signifie que les de´gagements de N 2 O augmentent quand on applique plus d'engrais que le taux optimal. Les e´missions de N 2 O progressent line´airement avec la charge nitrique, soit la somme des concentrations quotidiennes de N-NO 3 a`une profondeur de 0 a`15 cm. Ces re´sultats laissent croire que la non-line´arite´de la relation entre le taux d'application des engrais N et les e´missions de N 2 O s'explique par l'efficacite´de´croissante de la plante a`absorber le N-NO 3 aux taux d'application plus e´leve´s.

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“…(1 (Ruser et al 1998;Smith et al 1998a,b;Conen et al 2000;Flessa et al 2002). Peak N 2 O emissions and denitrification events were triggered by rainfall events supporting denitrification as the primary source for N 2 O in this system.…”

Section: Discussionmentioning

confidence: 86%

Effect of split application of fertilizer nitrogen on N₂O emissions from potatoes

Burton¹,

Zebarth²,

Gillam³

et al. 2008

Can. J. Soil. Sci.

167

109

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( availability and increased rainfall resulting in reduced aeration. Split N application was effective in reducing N 2 O emissions by minimizing the supply of NO 3 ( when demand for terminal electron acceptors was high. N 2 O emissions were higher in the potato hill relative to the furrow; however, denitrification rate was higher in the furrow. Nitrate intensity (NI) expresses the exposure of the soil microbial population to NO 3 ( and was calculated as the summation of daily soil nitrate concentration over the monitoring period. Cumulative N 2 O emissions were positively related to NI across year, N fertility treatment and row location. Denitrification was not related to NI, reflecting the primary role of NO 3 ( in influencing the N 2 O:N 2 ratio of denitrification rather than the magnitude of the overall process. Split N application was an effective strategy for reducing N 2 O emissions in years where there was significant rainfall during the period between planting and hilling. ( dans le sol combine´e a`des pre´cipitations plus abondantes, facteurs qui ont nui a`l'ae´ration du sol. L'application fractionne´e d'engrais N re´duit les de´gagements de N 2 O en abaissant la quantite´de NO 3 ( quand la demande d'accepteurs d'e´lectrons finaux est e´leve´e. Les e´missions de N 2 O sont plus importantes sur la butte que dans le sillon; cependant, c'est dans le sillon que la de´nitrification est la plus intense. La charge nitrique (CN) indique le degre´d'exposition de la microflore tellurique aux NO 3 ( et correspond a`la somme de la concentration quotidienne de nitrates dans le sol durant la pe´riode a`l'e´tude. Les e´missions cumulatives de N 2 O sont positivement corre´le´es a`la CN pendant l'anne´e, a`la fertilisation azote´e et a`l'emplacement du rang. La de´nitrification ne pre´sente aucun lien avec la CN, signe que le NO 3 ( joue un roˆle primordial en modifiant le ratio N 2 O:N 2 de la de´nitrification et non l'amplitude du phe´nome`ne. L'application fractionne´e d'engrais N est une bonne strate´gie pour re´duire les e´missions de N 2 O les anne´es ou`il pleut beaucoup durant la pe´riode qui se´pare la plantation du buttage. For personal use only.

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N2O and CH4 fluxes in potato fields: automated measurement, management effects and temporal variation

Cited by 137 publications

References 29 publications

Nitrous Oxide Emissions from Clover in the Mediterranean Environment

Nitrous Oxide Emissions from Clover in the Mediterranean Environment

N₂O emissions from spring barley production as influenced by fertilizer nitrogen rate

Effect of split application of fertilizer nitrogen on N₂O emissions from potatoes

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N2O and CH4 fluxes in potato fields: automated measurement, management effects and temporal variation

Cited by 137 publications

References 29 publications

Nitrous Oxide Emissions from Clover in the Mediterranean Environment

Nitrous Oxide Emissions from Clover in the Mediterranean Environment

N2O emissions from spring barley production as influenced by fertilizer nitrogen rate

Effect of split application of fertilizer nitrogen on N2O emissions from potatoes

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Product

Resources

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N₂O emissions from spring barley production as influenced by fertilizer nitrogen rate

Effect of split application of fertilizer nitrogen on N₂O emissions from potatoes