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At the same time the construction of terraces influences soil carbonĭynamics by land-use change and the alteration of local topography and hydrological conditions (Shi et al., 2019 Stavi et al., 2019). Terracing is recognized as a major adaptive strategy for land use in hilly areas and as an efficientĬonservation practice that provides multiple ecosystem services, e.g., erosion control and enhanced biomass yields, soil water recharge, and nutrient Since post-Neolithic times, the construction of terraces has played an important role in the expansion and intensification of agriculture forįood production (Brown et al., 2021). The depth–age patterns of Q 10 and SOC fraction composition of terraced soils observed in our study site differįrom those seen in non-terraced soils, and this has implications when assessing the effects of climate warming and terrace abandonment on the In conclusion, terracing in our study site has stabilized SOC as a result of soil burialĭuring terrace construction. Terrace soil becomes older, SOC stocks in deep buried horizons are characterized by a higher temperature sensitivity, potentially resulting from the Reduction in substrate availability due to SOC mineral protection with aging attenuates the intrinsic Q 10 of SOC decomposition. At relatively younger ages of soil burial, the Incubations revealed that the dominant controls on Q 10 depend on the terrace soil burial age.
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Shift to more processed recalcitrant SOC with soil burial age also contributes to SOC stability in terraced soils. Observed a shift in SOC fraction composition from particulate organic C towards mineral-protected C with increasing burial age. This suggests that the burial of former topsoil due to terracing provided a mechanism for stabilizing SOC. Than non-terraced soils at comparable soil depths, a significantly lower potential soil respiration was observed relative to a control Results showed that although buried terrace soils contained 1.7 times more unprotected SOC (i.e., coarse particulate organic carbon) Terrace soils in NE England using soil fractionation and temperature-sensitive incubation combined with terrace soil burial-age Here we explored the factors controlling SOC stability and the temperature sensitivity ( Q 10) of abandoned prehistoric agricultural Mechanistic understanding of soil organic carbon (SOC) (de-)stabilization mechanisms and the persistence of SOC stored in terraced soils is far fromĬomplete. 8 Geography and Environmental Science, University of Southampton, Highfield, Southampton SO17 1BJ, UKĬorrespondence: Pengzhi Zhao Hide author detailsĬorrespondence: Pengzhi Zhao Received: – Discussion started: – Revised: – Accepted: – Published: īeing the most common human-created landforms, terrace construction has resulted in an extensive perturbation of the land surface.7 Department of Environmental Systems Science, ETH Zurich, UniversitätstraZürich, Switzerland.6 Department of Geography and Geology, University of Salzburg, 5020 Salzburg, Austria.5 Archaeological Research Services Ltd, Angel House, Portland Square, Bakewell DE45 1HB, UK.4 Department of Land, Environment, Agriculture and Forestry, University of Padova, Viale dell'Università 16, 35020 Legnaro, Italy.3 Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Via delle Scienze 206, 33100 Udine, Italy.2 Tromsø University Museum, UiT The Arctic University of Norway, KvaløTromsø, Norway.1 Georges Lemaître Centre for Earth and Climate Research, Earth and Life Institute, UCLouvain, 1348 Louvain-la-Neuve, Belgium.