Tracing sources and turnover of soil organic matter in a long-term irrigated dry forest using a novel hydrogen isotope approach
Soil Biology and Biochemistry(2023)
摘要
The contribution from foliage, roots, and fungi to soil organic matter (SOM) represents a key unknown in SOM dynamics. Since stable hydrogen isotope ratios (δ2Hn) can greatly differ among these sources, we explored δ2Hn to elucidate sources contribution to SOM. Moreover, we assessed whether addition of 2H-depleted water – providing 2H-signal that gets incorporated into organic matter – allows tracing of new organic H and thus assessing SOM turnover.
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关键词
Non-exchangeable hydrogen, Stable isotopes, Soil organic matter dynamics, Bayesian mixing models, Soil fractions, Litter decomposition
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