《Table 4 Enrichment coefficient and transfer coefficient of Russian M.officinalis and M.sativa.》

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《Functions of Russian Melilotus officinalis on Degraded Soil Improvement》

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Sampling and testing time is in September 2008 and September 2009.

The enrichment function of plants on heavy metals reflects their ability to repair soil.The enrichment function is expressed by the enrichment coefficient，which is the ratio of the concentration of pollutants in the plant to the concentration of the same contaminant in the soil.The transfer capacity of heavy metals is expressed by the transfer coefficient，which is the ratio of the heavy metal content of the aboveground part of the plant to the heavy metal content of the root.The measured data were sorted and analyzed with M.sativa as the control（Table 4）.