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首页> 外文期刊>Plant and Soil >Dynamics of the water extractable organic carbon pool during mineralisation in soils from a Douglas fir plantation and an oak-beech forestan incubation experiment
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Dynamics of the water extractable organic carbon pool during mineralisation in soils from a Douglas fir plantation and an oak-beech forestan incubation experiment

机译：道格拉斯冷杉人工林和橡树-山毛榉林培育实验中土壤矿化过程中可水提取的有机碳库的动态

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摘要

In the context of land use change, the dynamics of the water extractable organic carbon (WEOC) pool and CO production were studied in soil from a native oak-beech forest and a Douglas fir plantation during a 98-day incubation at a range of temperatures from 8pC to 28pC. The soil organic carbon, water contents and mineralisation rates of soil samples from the 0-5 cm layer were higher in the native forest than in the Douglas fir plantation. During incubation, a temperature-dependent shift in the tp#pdC of respired CO was observed, suggesting that different carbon compounds were mineralised at different temperatures. The initial size of the WEOC pool was not affected by forest type. The WEOC pool size of samples from the native forest did not change consistently over time whereas it decreased significantly in samples from the Douglas plantation, irrespective of soil temperature. No clear changes in the tp#pdC values of the WEOC were observed, irrespective of soil origin. The fate of the WEOC, independent of soil organic carbon content or mineralisation rates, appeared to relate to forest types. Replacement of native oak-beech forest with Douglas fir plantation impacts carbon input to the soil, mineralisation rates and production of dissolved organic carbon.
机译：在土地利用变化的背景下，研究了在98摄氏度的温育下于一定温度范围内的天然栎山毛榉森林和花旗松人工林的土壤中可水提取的有机碳（WEOC）池和CO生成的动态。从8pC到28pC。在原始森林中，0-5 cm层土壤样品的土壤有机碳，水含量和矿化速率高于花旗松人工林。在孵育过程中，观察到呼吸的CO的tp＃pdC随温度变化，这表明不同的碳化合物在不同的温度下会矿化。 WEOC池的初始大小不受森林类型的影响。来自原生林的样品的WEOC池大小不会随时间持续变化，而来自道格拉斯人工林的样品的WEOC池大小却显着减小，而与土壤温度无关。不论土壤来源如何，均未观察到WEOC的tp＃pdC值有明显变化。 WEOC的命运与土壤有机碳含量或矿化速率无关，似乎与森林类型有关。道格拉斯冷杉人工林取代原生橡树-山毛榉森林会影响土壤中的碳输入量，矿化率和溶解有机碳的产生。

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