Measuring simultaneous fluxes from soil of N2O and N2 in the field using the 15N-Gas "nonequilihrium" technique
Measuring simultaneous fluxes from soil of N2O and N2 in the field using the 15N-Gas "nonequilihrium" technique
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DOI：
10.1021/es010885u
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发表时间：
2001-11-01
影响因子：
11.4
通讯作者：
Robertson, GP
中科院分区：
文献类型：
--
作者：
Bergsma, TT;Ostrom, NE;Robertson, GP
我们的目的是使用以前用于N(2)的(15)N-气体“非平衡”技术(即，“Hauck”技术)来测量土壤中N(2)O和N(2)的同时通量。我们通过改进质谱计的前置放大器来实现对N(2O)O的分析。我们的系统准确地测量了标记土壤浆液对N(2)和N(2)O的富集量。在田间，我们从冬小麦的(15)N标记小区测量了土壤反硝化过程中N(2)和N(2)O的通量。在4天内进行了9个小室孵化。N(2)通量范围在检测限以下(
Our purpose was to measure simultaneous fluxes from soil of both N(2)O and N(2) from the same plot in the field using the (15)N-gas "nonequilibrium" technique (i.e., the "Hauck" technique) as used previously for N(2). We accommodated analysis of N(2)O by modifying the head amplifier of our mass spectrometer. Our system accurately measured the (15)N enrichments of labeled soil slurries for both N(2) and N(2)O. In the field, we measured flux of N(2) and N(2)O during soil denitrification from a (15)N-labeled plot of winter wheat. Nine chamber incubations were conducted over 4 days. N(2) flux ranged from below detection limit (