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| 001 | 820892 | ||
| 005 | 20210129224640.0 | ||
| 024 | 7 | _ | |a 10.1002/rcm.7689 |2 doi |
| 024 | 7 | _ | |a 0951-4198 |2 ISSN |
| 024 | 7 | _ | |a 1097-0231 |2 ISSN |
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| 082 | _ | _ | |a 530 |
| 100 | 1 | _ | |a Scheer, Clemens |0 P:(DE-HGF)0 |b 0 |e Corresponding author |
| 245 | _ | _ | |a An improved $^{15}$ N tracer approach to study denitrification and nitrogen turnover in soil incubations |
| 260 | _ | _ | |a New York, NY |c 2016 |b Wiley Interscience |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 336 | 7 | _ | |a Journal Article |0 0 |2 EndNote |
| 520 | _ | _ | |a RationaleDenitrification (the reduction of oxidized forms of inorganic nitrogen (N) to N2O and N2) from upland soils is considered to be the least well-understood process in the global N cycle. The main reason for this lack of understanding is that the terminal product (N2) of denitrification is extremely difficult to measure against the large atmospheric background.MethodsWe describe a system that combines the 15N-tracer technique with a 40-fold reduced N2 (2% v/v) atmosphere in a fully automated incubation setup for direct quantification of N2 and N2O emissions. The δ15N values of the emitted N2 and N2O were determined using a custom-built gas preparation unit that was connected to a DELTA V Plus isotope ratio mass spectrometer. The system was tested on a pasture soil from sub-tropical Australia under different soil moisture conditions and combined with 15N tracing in extractable soil N pools to establish a full N balance.ResultsThe method proved to be highly sensitive for detecting N2 (1.12 μg N h−1 kg−1 dry soil (ds)) and N2O (0.36 μg N h−1 kg−1 ds) emissions. The main end product of denitrification in the investigated soil was N2O for both water contents, with N2 accounting for only 3% to 13% of the total denitrification losses. Between 90 and 95% of the added 15N fertiliser could be recovered in N gases and extractable soil N pools. |
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| 700 | 1 | _ | |a Meier, Rudolf |0 P:(DE-HGF)0 |b 1 |
| 700 | 1 | _ | |a Brüggemann, Nicolas |0 P:(DE-Juel1)142357 |b 2 |
| 700 | 1 | _ | |a Grace, Peter R. |0 P:(DE-HGF)0 |b 3 |
| 700 | 1 | _ | |a Dannenmann, Michael |0 P:(DE-HGF)0 |b 4 |
| 773 | _ | _ | |a 10.1002/rcm.7689 |g Vol. 30, no. 18, p. 2017 - 2026 |0 PERI:(DE-600)2002158-6 |n 18 |p 2017 - 2026 |t Rapid communications in mass spectrometry |v 30 |y 2016 |x 0951-4198 |
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| 914 | 1 | _ | |y 2016 |
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