肉苁蓉不同生育阶段矿质元素含量

Mineral Elements Content of C.Deserticola at Different Growth Stages

应用ICP-AES技术测定了肉苁蓉不同生育阶段矿质元素含量。结果显示:(1)肉苁蓉药材的最佳采收期(肉质茎生长期),常量矿质元素中K含量高达9.45mg.g-1,五种常量矿质元素的含量比例为K∶Na∶P∶Ca∶Mg=12∶3.4∶1.6∶1.4∶1,微量矿质元素中Fe含量最高为97.31μg.g-1,五种微量矿质元素的含量比例为Fe∶Zn∶Cu∶Mn∶B=25∶3.7∶3.5∶1.2∶1。(2)生殖生长阶段,肉苁蓉入药部位肉质茎中Ca,Mg,Fe,Zn,Cu,Mn,B矿质元素含量在出土后显著高于出土前,其中蒴果形成期微量矿质元素Fe和Mn含量依次为697.55和38.75μg.g-1,分别是肉质茎生长期的7.2和8.3倍。(3)生殖生长阶段地上部分生殖生长中心对Na元素有排斥作用同时对K,P,Ca,Mg,Fe,Mn,B,Zn,Cu有吸收富集作用。本研究结果为肉苁蓉的质量评价和合理施肥提供了新的科学依据。

ICP-AES technology was used to determine the mineral elements content of Cistanche deserticola Ma（C.deserticola）.The results showed that：（1） At succulent stem stages,the content of K was the highest in 5 macroelements,it can reach to 9.45 mg·g-1,and the proportion for K∶Na∶P∶Ca∶Mg was 12∶3.4∶1.6∶1.4∶1.Among 5 microelements,the content of Fe was the highest and can reach to 97.31 μg·g-1,and the proportion for Fe∶Cu∶Mn∶Zn∶Cu∶B was 25∶3.7∶3.5∶1.2∶1.（2）At reproductive growth stages,the contents of Ca,Mg,Fe,Zn,Cu,Mn and B at unearthed stage were significantly higher than that at the underearth stage,especially for the content of Fe and Mn,they can respectively reach to 697.55 and 38.75 μg·g-1 at capsule formative stage.The contents of Fe and Mn at capsule formative stage were almost 7.2 and 8.3 times than that at succulent stem stage.（3） At reproductive growth stages,the aerial part will exclude Na and accumulate P,K,Ca,Mg,Fe,Mn,Zn,Cu and B.This result of the study will be a scientific basis for evaluating the quality of C.deserticola.