...碳；土壤活性有机碳；植被覆盖；长期施肥 [gap=2778]Key words: Udic Mollisols; organic carbon; labile soil organic carbon; vegetation; long-term fertility ...
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土壤活性有机碳的不同类型对土壤养分的有效性贡献不同。
The contribution of different types of active soil organic carbon to soil available nutrients was different.
土壤活性有机碳是指土壤中移动快、稳定性差、易氧化、矿化，并对植物和土壤微生物活性较高的那部分碳，常可用水溶性有机碳、微生物量碳和易氧化碳等来进行表征。
Soil labile organic carbon (LOC) refers to the fractions of organic carbons that are easy to move and to be oxidized and mineralized, and they are quite available to plant and soil microorganisms.
湿地土壤中的活性有机碳可以为土壤微生物提供更多的有效能量，从而加快湿地生态系统养分循环过程。
Soil active carbon provides more energy for soil microbe and the process of nutrients cycling in freshwater marsh ecosystem is accelerated.
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