PLoS ONE 12(4):Įditor: Ben Bond-Lamberty, Pacific Northwest National Laboratory, UNITED STATES This outcome strengthens results from soil incubation studies.Ĭitation: González-Domínguez B, Studer MS, Hagedorn F, Niklaus PA, Abiven S (2017) Leaching of soils during laboratory incubations does not affect soil organic carbon mineralisation but solubilisation. Therefore, we did not find evidence that incubation experiments introduce a bias on SOC mineralisation. On the other hand, N min did not accumulate in the high C:N soil but, by the end of the experiment, leaching had promoted 33.9% more SOC solubilisation than beakers. By the end of the 121-day experiment, the low C:N soil significantly accumulated more N min in beakers (5.12 g kg -1 OC) than in microlysimeters (3.00 g kg -1 OC) but there was not a significant difference in SOC mineralisation at any point of the experiment. The latter allowed leaching the soil samples during the incubation. For this, we selected two soils representative of the C:N ratio values found in European temperate forests, and applied two incubation systems: ‘closed’ beakers and ‘open’ microlysimeters.
As carbon and nitrogen cycles are tightly linked, we aimed at investigating whether the incubation-induced accumulation of mineral nitrogen (N min) biases soil organic carbon (SOC) mineralisation. Laboratory soil incubations provide controlled conditions to investigate carbon and nutrient dynamics however, they are not free of artefacts.
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