Gas pooling:A sampling technique to overcome spatial heterogeneity of soil carbon dioxide and nitrous oxide fluxes

Arias-Navarro, Cristina and Díaz-Pinés, Eugenio and Kiese, Ralf and Rosenstock, Todd S. and Rufino, Mariana C. and Stern, David and Neufeldt, Henry and Verchot, Louis V. and Butterbach-Bahl, Klaus (2013) Gas pooling:A sampling technique to overcome spatial heterogeneity of soil carbon dioxide and nitrous oxide fluxes. Soil Biology and Biochemistry, 67. pp. 20-23. ISSN 0038-0717

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Abstract

Small-scale spatial variability in soil carbon dioxide (CO2) and nitrous oxide (N2O) fluxes poses serious challenges to the experimental design, and number of gas samples needed to provide a reliable estimate of flux usually exceeds analytical capacities. We pooled gas samples -analogously to soil pooling - toovercome this challenge. Our sample pooling technique collects a composite gas sample from several chambers instead of the conventional practise of analyzing samples from chambers individually, thusreducing numbers of gas samples. The method was verified to be reasonably accurate in forest, grassland and agricultural fields over a four week measurement campaign. Pooling technique results differed by2-8% for CO2 and by 3-4% for N2O when compared to individual chamber means. That shows pooling of gas samples across individual static chambers is an acceptable approach to integrate spatial heterogeneity.

Item Type:
Journal Article
Journal or Publication Title:
Soil Biology and Biochemistry
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2400/2404
Subjects:
ID Code:
86534
Deposited By:
Deposited On:
31 May 2017 09:18
Refereed?:
Yes
Published?:
Published
Last Modified:
20 May 2020 05:28