Isotopomer analysis of nitrous oxide accumulated in soil cultivated with tea (Camellia sinensis) in Shizuoka, central Japan

Zou, Yun; Hirono, Yuhei; Yanai, Yosuke; Hattori, Shohei; Toyoda, Sakae; Yoshida, Naohiro

doi:10.1016/j.soilbio.2014.06.016

Cited by 75 publications

(107 citation statements)

References 84 publications

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“…Liu et al (2016) noted that on the catchment-scale potential N 2 O emission rates were related to hydroxylamine and NO − 3 , but not NH + 4 content in soil. Zou et al (2014) found high SP (15.0 to 20.1 ‰) values at WFPS of 73 to 89 %, suggesting that fungal denitrification and bacterial nitrification contributed to N 2 O production to a degree equivalent to that of bacterial denitrification.…”

Section: Link To Modelling Approachesmentioning

confidence: 90%

“…An endmember mixing approach has been previously used to estimate the fraction of bacterial N 2 O (%B DEN ), but without independent estimates of N 2 O reduction (Zou et al, 2014), but due to the unknown isotopic shift by N 2 O reduction, the ranges of minimum and maximum estimates were large, showing that limited information is obtained without N 2 flux measurement.…”

Section: Contribution Of Bacterial Denitrificationmentioning

confidence: 99%

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Effect of soil saturation on denitrification in a grassland soil

et al. 2017

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Abstract. Nitrous oxide (N 2 O) is of major importance as a greenhouse gas and precursor of ozone (O 3 ) destruction in the stratosphere mostly produced in soils. The soil-emitted N 2 O is generally predominantly derived from denitrification and, to a smaller extent, nitrification, both processes controlled by environmental factors and their interactions, and are influenced by agricultural management. Soil water content expressed as water-filled pore space (WFPS) is a major controlling factor of emissions and its interaction with compaction, has not been studied at the micropore scale. A laboratory incubation was carried out at different saturation levels for a grassland soil and emissions of N 2 O and N 2 were measured as well as the isotopocules of N 2 O. We found that flux variability was larger in the less saturated soils probably due to nutrient distribution heterogeneity created from soil cracks and consequently nutrient hot spots. The results agreed with denitrification as the main source of fluxes at the highest saturations, but nitrification could have occurred at the lower saturation, even though moisture was still high (71 % WFSP). The isotopocules data indicated isotopic similarities in the wettest treatments vs. the two drier ones. The results agreed with previous findings where it is clear there are two N pools with different dynamics: added N producing intense denitrification vs. soil N resulting in less isotopic fractionation.

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Section: Link To Modelling Approachesmentioning

confidence: 90%

Section: Contribution Of Bacterial Denitrificationmentioning

confidence: 99%

Effect of soil saturation on denitrification in a grassland soil

et al. 2017

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“…However, in a study by Zou et al . the N 2 O‐O source was not well determined because of the lack of soil water δ 18 O data.…”

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confidence: 99%

“…In our previous study of a green tea field soil, N 2 O was found to accumulate between the tea plant rows where fertilizers were applied. Its major source was estimated through isotopomer analysis to be a bacterial denitrification process …”

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confidence: 99%

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Rainwater, soil water, and soil nitrate effects on oxygen isotope ratios of nitrous oxide produced in a green tea (Camellia sinensis) field in Japan

Zou

Hirono

Yanai

et al. 2015

Rapid Comm Mass Spectrometry

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Mechanisms responsible for high N₂O emissions from subarctic permafrost peatlands studied via stable isotope techniques

Gil

Pérez

Boering

et al. 2017

Global Biogeochemical Cycles

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Recent field studies have shown that there are habitats in the subarctic tundra emitting N 2 O at exceptionally high rates. In this study, stable isotope techniques were applied to characterize the processes responsible for these high N 2 O emissions which have been found from bare peat surfaces in permafrost peatlands. The results include the first data on the nitrogen and oxygen isotopic composition of N 2 O emitted from arctic tundra. The emission-weighted average δ 15 N bulk value for N 2 O of À13.0‰ AE 2.0‰ (mean AE SD; n = 8) from the bare peat surfaces falls within the range of the emission-weighted average values from other natural ecosystems but is distinct from those for managed/agricultural ecosystems. This implies that if in the future, a smaller rate in the overall decreasing trend of δ 15 N bulk N 2 O tropospheric isotopic composition is found, it cannot be attributed only to agricultural N 2 O emission reductions from mitigation actions but also to soils in natural ecosystems that may be emitting more N 2 O to the atmosphere due to warmer conditions. The site preference (SP) values from emitted N 2 O range from À30‰ to 58‰, indicating a temporal shift of microbial production and consumption of N 2 O during the sampling period. Soil emission SP data suggest that the N 2 O emission in subarctic tundra are more likely to be produced by nitrifier denitrification in the drier study year, but due to variable published SP values for N 2 O production processes in soils, this interpretation has to be taken with caution. According to SP values at depth, denitrification was the main N 2 O production pathway. To better address the usefulness of SP in partitioning microbial mechanisms in soils, further studies in soils mesocosms are required.

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Isotopomer analysis of nitrous oxide accumulated in soil cultivated with tea (Camellia sinensis) in Shizuoka, central Japan

Cited by 75 publications

References 84 publications

Effect of soil saturation on denitrification in a grassland soil

Effect of soil saturation on denitrification in a grassland soil

Rainwater, soil water, and soil nitrate effects on oxygen isotope ratios of nitrous oxide produced in a green tea (Camellia sinensis) field in Japan

Mechanisms responsible for high N₂O emissions from subarctic permafrost peatlands studied via stable isotope techniques

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Isotopomer analysis of nitrous oxide accumulated in soil cultivated with tea (Camellia sinensis) in Shizuoka, central Japan

Cited by 75 publications

References 84 publications

Effect of soil saturation on denitrification in a grassland soil

Effect of soil saturation on denitrification in a grassland soil

Rainwater, soil water, and soil nitrate effects on oxygen isotope ratios of nitrous oxide produced in a green tea (Camellia sinensis) field in Japan

Mechanisms responsible for high N2O emissions from subarctic permafrost peatlands studied via stable isotope techniques

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Mechanisms responsible for high N₂O emissions from subarctic permafrost peatlands studied via stable isotope techniques