Relationship between grain size of total suspended solids (TSS) and particulate organic carbon (POC) content is the base of studying POC transportation and flux in river.

悬浮物(TSS)粒径与颗粒有机碳(POC)含量关系的研究，是河流POC形态变化及输送过程和输运通量研究的基础。

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The study examined the total contents of soil organic carbon and the content of soil active organic carbon and stable organic carbon in farmland, grassland, scrub and forest ecosystems.

本研究分析了子午岭林区农田、草地、灌丛和森林不同生态系统土壤总有机碳、活性有机碳和稳定性有机碳含量。

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The biggest influence to soil organic carbon density was organic carbon content, the next was total nitrogen, and content of soil available phosphorus was also influenced soil organic carbon density.

对毛竹土壤有机碳密度影响最大的为有机碳含量，对土壤有机碳密度的影响次之的为土壤全氮量，土壤有效磷量对其影响程度也较大。

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