The result showed that Cu,Zn,Fe,Mn mostly distributing in the cortex,secondly distributing in the xylem or the marrow,the content is lower in the phloem of rhizome tissue on the cultivated Rheum.

• 结果表明,种植大黄根茎中铜、锌、铁、锰等元素主要分布在皮层,其次是木质部或髓部,元素含量较低的是韧皮部。