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| Liang, Zhi; Olesen, Jørgen E.; Jensen, Johannes L.; Elsgaard, Lars. |
| Increasing subsoil organic carbon inputs could potentially mitigate climate change by sequestering atmospheric CO2. Yet, microbial turnover and stabilization of labile carbon in subsoils are regulated by complex mechanisms including the availability of nitrogen (N), phosphorous (P), and sulfur (S). The present study mimicked labile organic carbon input using a versatile substrate (i.e. glucose) to address the interaction between carbon-induced mineralization, N-P-S availability, and microbial physiology in topsoil and subsoils from a temperate agricultural sandy loam soil. A factorial incubation study (42 days) showed that net losses of added carbon in topsoil were constant, whereas carbon losses in subsoils varied according to nutrient treatments. Glucose... |
| Tipo: Journal paper |
Palavras-chave: Soil biology. |
| Ano: 2018 |
URL: http://orgprints.org/33793/1/1-s2.0-S0016706118309297-main.pdf |
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| Liang, Zhi; Elsgaard, Lars; Nicolaisen, Mette; Lyhne-Kjæbye, Annemette; Olesen, Jørgen E.. |
| Aims Mechanisms of subsoil carbon sequestration from deep-rooted plants are elusive, but may contribute to climate change mitigation. This study addressed the role of root chemistry on carbon mineralization and microbiology in a temperate agricultural subsoil (60 and 300 cm depth)compared to topsoil (20 cm depth). Methods Roots from different plant species were chemically characterized and root-induced CO2 production was measured in controlled soil incubations (20 weeks). Total carbon losses, β-glucosidase activity, carbon substrate utilization, and bacterial gene copy numbers were determined. After 20 weeks, resultant carbon mineralization responses to mineral nitrogen (N) were tested. Results Root-induced carbon losses were significantly lower in... |
| Tipo: Journal paper |
Palavras-chave: Soil biology. |
| Ano: 2018 |
URL: http://orgprints.org/33966/1/Liang2018_Article_CarbonMineralizationAndMicrobi.pdf |
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