The N2O product ratio of nitrification and its dependence on long-term changes in soil pH

Mørkved, Pål Tore; Dörsch, Peter; Bakken, Lars R.

doi:10.1016/j.soilbio.2007.03.006

Cited by 196 publications

(126 citation statements)

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“…disappears quickly within the first few centimeters of the acidic forest soil at TSP, while NO 3 -concentrations increase, suggesting high nitrification potentials. Especially acidic soils have been reported to result in high apparent N 2 O/NO 3 -ratios during nitrification (Mørkved et al 2007), probably due to chemical decomposition of NO 2…”

Section: Introductionmentioning

confidence: 99%

The importance of denitrification for N2O emissions from an N-saturated forest in SW China: results from in situ 15N labeling experiments

et al. 2013

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) were applied as a single dose to replicated plots at two positions along the hill slope (at top and bottom, respectively) during monsoonal summer. During a 6-day period after label application, we found that 71-100 % of the emitted N 2 O was derived from the labeled NO 3 -pool irrespective of slope position. Based on this, we assume that denitrification is the dominant process of N 2 O formation in these forest soils. Within 6 days after label addition, the fraction of the added 15 N-NO 3 -emitted as 15 N-N 2 O was highest at the low-N addition plots (0.2 g N m -2) , amounting to 1.3 % at the top position of the hill slope and to 3.2 % at the bottom position, respectively. Our data illustrate the large potential of acid forest soils in subtropical China to form N 2 O from excess NO 3 -most likely through denitrification.

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Section: Introductionmentioning

confidence: 99%

The importance of denitrification for N2O emissions from an N-saturated forest in SW China: results from in situ 15N labeling experiments

et al. 2013

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“…Unexpectedly, the pH had no effect on the rates of nitrification. (Mørkved et al, 2007) Permanent wheat field (southeast et al, , Rumpel et al, 2015.…”

Section: Bioavailability Of Nutrientsmentioning

confidence: 99%

Ammonia-oxidizing microorganisms: key players in the promotion of plant growth

Amoo

Babalola

2017

J. Soil Sci. Plant Nutr.

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“…The oxidative decomposition of hydroxylamine (Bremner et al 1980;Hooper and Terry 1979) and nitrifier denitrification (Poth and Focht 1985;Zhu et al 2013a) (i.e. denitrification by ammonia oxidising bacteria, as proposed by Baggs (2011)) have been implicated, with a key role for nitrite suggested (Mørkved et al 2007). The roles of abiotic factors such as metal ion species, including iron III and manganese II, in the oxidation of hydroxylamine (Hooper and Terry 1979;Bremner et al 1980;Zhu et al 2013b;Heil et al 2015), chemical or thermal decomposition of hydroxylamine, and processes such as nitrifier denitrification under conditions of oxygen stress have not been widely acknowledged or included in models.…”

Section: Introductionmentioning

confidence: 99%

“…There were conflicting responses of P n to temperature (Goodroad and Keeney 1984;Maag and Vinther 1996;Ingwersen et al 1999). Martikainen (1985) found an exponential increase in P n as pH declined from 4.7 to 4.1 in some acidic forest soils, and Mørkved et al (2007) reported N 2 O emissions two orders of magnitude higher in soils of pH <5, possibly due to chemodenitrification. However, other studies were less conclusive about the influence of pH (Goodroad and Keeney 1984;Mørkved et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Nitrification rates and associated nitrous oxide emissions from agricultural soils – a synopsis

Farquharson¹

2016

Soil Res.

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Abstract. Laboratory incubations were performed to estimate nitrification rates and the associated nitrous oxide (N 2 O) emissions under aerobic conditions on a range of soils from National Agricultural Nitrous Oxide Research Program field sites. Significant site-to-site variability in nitrification rates and associated N 2 O emissions was observed under standardised conditions, indicating the need for site-specific model parameterisation. Generally, nitrification rates and N 2 O emissions increased with higher water content, ammonium concentration and temperature, although there were exceptions. It is recommended that site-specific model parameterisation be informed by such data. Importantly, the ratio of N 2 O emitted to net nitrified N under aerobic conditions was small (<0.2% for the majority of measurements) but did vary from 0.03% to 1%. Some models now include variation in the proportion of nitrified N emitted as N 2 O as a function of water content; however, strong support for this was not found across all of our experiments, and the results demonstrate a potential role of pH and ammonium availability. Further research into fluctuating oxygen availability and the coupling of biotic and abiotic processes will be required to progress the process understanding of N 2 O emissions from nitrification.

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The N2O product ratio of nitrification and its dependence on long-term changes in soil pH

Cited by 196 publications

References 39 publications

The importance of denitrification for N2O emissions from an N-saturated forest in SW China: results from in situ 15N labeling experiments

The importance of denitrification for N2O emissions from an N-saturated forest in SW China: results from in situ 15N labeling experiments

Ammonia-oxidizing microorganisms: key players in the promotion of plant growth

Nitrification rates and associated nitrous oxide emissions from agricultural soils – a synopsis

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