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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Model-based evaluation of impact of soil redistribution on soil organic carbon stocks in a temperate hedgerow landscape
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Model-based evaluation of impact of soil redistribution on soil organic carbon stocks in a temperate hedgerow landscape

机译：基于模型的温带树篱景观中土壤再分配对土壤有机碳储量的影响评估

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Agroforestry systems are promoted for providing a number of ecosystem services and environmental benefits, including soil protection and carbon sequestration. This study proposes a modelling approach to quantify the impact of soil redistribution on soil organic carbon (SOC) storage in a temperate hedgerow landscape. Evolution of SOC stocks at the landscape scale was examined by simulating vertical and horizontal SOC transfers in the 0-105 cm soil layer due to soil redistribution by tillage and water processes. A spatially explicit SOC dynamics model (adapted from RothC-26.3) was used, coupled with a soil-redistribution model (LandSoil). SOC dynamics were simulated over 90 years in an agricultural hedgerow landscape dedicated to dairy farming, with a mix of cropping and grasslands. Climate and land use were simulated considering business-as-usual scenarios derived from existing information on the study area. A net decrease in SOC stocks was predicted at the end of the simulation period. Soil redistribution induced a net SOC loss equivalent to 2 kg C ha(-1) yr(-1) because of soil exportation out of the study site and an increase in SOC mineralization. Hedgerows and woods were the only land use in which soil redistribution induced net SOC storage. Soil tillage was the main process that induced soil redistribution within cultivated fields. Soil exportation out of the study area was due to erosion by water, but remained low because of the protective role of the hedgerow network. These soil transfers redistributed SOC stocks in the landscape, mostly within cultivated fields. Copyright (C) 2016 John Wiley & Sons, Ltd.
机译：促进农林业系统提供许多生态系统服务和环境效益，包括土壤保护和碳固存。这项研究提出了一种建模方法来量化温带树篱景观中土壤再分配对土壤有机碳（SOC）储存的影响。通过模拟0-105 cm土壤层中耕作和水处理过程引起的土壤再分配所引起的垂直和水平SOC迁移，研究了景观尺度上SOC储量的演变。使用空间显式SOC动力学模型（改编自RothC-26.3），以及土壤分布模型（LandSoil）。 SOC动态在90年的农业树篱景观中进行了模拟，该景观专门用于奶牛养殖，混合了农作物和草原。考虑到从研究区域的现有信息得出的照常情景，模拟了气候和土地利用。在模拟期结束时，预计SOC存量将净减少。土壤重新分配导致净SOC损失相当于2 kg C ha（-1）yr（-1），这是由于土壤从研究地点输出和SOC矿化增加所致。绿篱和树林是土壤重新分配导致SOC净储存的唯一土地利用方式。土壤耕作是引起耕地内土壤重新分布的主要过程。从研究区域向外的土壤出口是由于水的侵蚀，但由于树篱网络的保护作用，土壤出口仍然很低。这些土壤转移主要在耕地中重新分配了景观中的SOC储量。版权所有（C）2016 John Wiley＆Sons，Ltd.

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