青海群加地区种植大黄根茎组织结构中微量元素特征

Studies on Trace Elements of Rhizome Tissue for Cultivated Rheum in Qunjia,Qinghai Province

微量元素对于种植青海大黄的生长发育有着重要作用。采集青海群加地区种植大黄根茎,分为皮层、韧皮部、木质部和髓部等四部分,采用原子吸收光谱法分别测试了其不同组织中铜、锌、铁、锰、钴、镍等元素含量。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。随着生长年龄增加种植大黄对铁、锰、钴元素营养需求量有所增加,对锌、铜、镍元素营养的需求量略减。

The trace element has an important function for the growth of cultivated Rheum. The rhizome of cultivated Rheum in Qunjia of Qinghai province, was picked broke into cortex, phloem, xylem and marrow, the content of Cu, Zn, Fe, Mn, Co, Ni elements of the every tissue was analyzed by atom absorb spectrum. 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. The cultivated Rheum required quantity has an increase for the Fe, Mn, Co, and decrease for the Zn, Cu, Ni element nutrition with the growth age changes.