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首页> 外文期刊>The Science of the Total Environment >Comparing soil inventory with modelling: Carbon balance in central European forest soils varies among forest types
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Comparing soil inventory with modelling: Carbon balance in central European forest soils varies among forest types

机译：将土壤存量与建模进行比较：欧洲中部森林土壤中的碳平衡因森林类型而异

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Forest soils represent a large carbon pool and already small changes in this pool may have an important effect on the global carbon cycle. To predict the future development of the soil organic carbon (SOC) pool, well-validated models are needed. We applied the litter and soil carbon model Yasso15 to 1838 plots of the German national forest soil inventory (NFSI) for the period between 1985 and 2014 to enables a direct comparison to the NFSI measurements. In addition, to provide data for the German Greenhouse Gas Inventory, we simulated the development of SOC with Yasso15 applying a climate projection based on the RCP8.5 scenario. The initial model-calculated SOC stocks were adjusted to the measured ones in the NFSI.On average, there were no significant differences between the simulated SOC changes (0.25 +/- 0.10 Mg C ha(-1) a(-1)) and the NFSI data (0.39 +/- 0.11 Mg C ha(-1) a(-1)). Comparing regional soil-unit-specific aggregates of the SOC changes, the correlation between both methods was significant (r(2) = 0.49) although the NFSI values had a wider range and more negative values. In the majority of forest types, representing 75% of plots, both methods produced similar estimates of the SOC balance. Opposite trends were found in mountainous coniferous forests on acidic soils. These soils had lost carbon according to the NFSI (-0.89 +/- 0.30 Mg C ha(-1) a(-1)) whereas they had gained it according to Yasso15 (0.21 +/- 0.10 Mg C ha(-1) a(-1)). In oligotrophic pine forests, the NFSI indicated high SOC gains (1.36 +/- 0.17 Mg C ha(-1) a(-1)) and Yasso15 much smaller (0.29 +/- 0.10 Mg C ha(-1) a(-1)).According to our results, German forest soils are a large carbon sink. The application of the Yasso15 model supports the results of the NFSI. The sink strength differs between forest types possibly because of differences in organic matter stabilisation. (C) 2018 Elsevier B.V. All rights reserved.
机译：森林土壤代表了一个大的碳库，而这个库中已经很小的变化可能会对全球碳循环产生重要影响。为了预测土壤有机碳（SOC）库的未来发展，需要经过充分验证的模型。我们将凋落物和土壤碳模型Yasso15应用于1985年至2014年期间的德国国家森林土壤清查（NFSI）的1838个样地中，以便与NFSI测量值进行直接比较。另外，为了提供德国温室气体清单的数据，我们使用了基于RCP8.5情景的气候预测模拟了Yasso15在SOC方面的发展。将模型计算的初始SOC储量调整为NFSI中的实测储量，平均而言，模拟SOC变化（0.25 +/- 0.10 Mg C ha（-1）a（-1）和NFSI数据（0.39 +/- 0.11 Mg C ha（-1）a（-1））。比较SOC变化的区域土壤单位特定聚集体，尽管NFSI值的范围更广且负值更大，但两种方法之间的相关性是显着的（r（2）= 0.49）。在代表75％样地的大多数森林类型中，两种方法均得出了类似的SOC平衡估计值。在酸性土壤的高山针叶林中发现了相反的趋势。这些土壤根据NFSI（-0.89 +/- 0.30 Mg C ha（-1）a（-1））损失了碳，而他们按照Yasso15（0.21 +/- 0.10 Mg C ha（-1）获得了碳损失。 a（-1））。在贫营养型松树林中，NFSI表示高SOC增益（1.36 +/- 0.17 Mg C ha（-1）a（-1）），而Yasso15则小得多（0.29 +/- 0.10 Mg C ha（-1）a（- 1））。根据我们的结果，德国森林土壤是一个很大的碳汇。 Yasso15模型的应用程序支持NFSI的结果。不同森林类型的汇聚强度可能不同，这可能是由于有机物稳定性的差异所致。 （C）2018 Elsevier B.V.保留所有权利。

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