肉苁蓉寄生对寄主梭梭体内主要矿质元素含量的影响

对寄生有肉苁蓉的梭梭(HA)与未寄生肉苁蓉的梭梭(CK)不同生长发育时期体内氮、磷、钾、钠、钙、镁、锰、铁等8种矿质营养元素含量的动态变化进行研究。实验结果表明:HA与CK体内的氮、磷、钾、钙、钠以及微量元素铁、锰的含量变化均无显著差异性,只有镁元素二者间差异显著;对于寄生植物肉苁蓉,其体内大量元素氮显著高于HA和CK,磷显著高于HA,而与CK差异不显著,钾、钠、钙、镁、锰、铁6种元素含量均显著性低于HA和CK,同时研究了肉苁蓉寄生后对梭梭体内矿质营养元素的吸收系数的影响,按吸收系数大小排列为N>P>Na>Mg>Ca>K>Mn>Fe。造成以上结果的原因可能与肉苁蓉属于全寄生性植物有关。

Effects of Cistanche deserticola parasitizing on content of main mineral elements in Haloxylon ammodendron

The contents of eight mineral elements including N,P,K,Na,Ca,Mg,Mn and Fe in HA (Haloxylon ammodendron parasitized by Cistanche deserticola.Ma.) and CK(Haloxylon ammodendron un-parasitized by Cistanche deserticola.Ma) were measured during different development stages.The results showed that there was no remarkable difference between HA and CK in the content of the macro-elements N,P,K,Ca,Na and the micro-elements Fe and Mn except for the element Mg.As for the parasitic plant Cistanche deserticola,the content of the element N was obviously higher than that in HA and CK,and the element P was obviously higher than that in HA,but not obviously different from that in CK;the content of the six elements K,Na,Ca,Mg,Mn and Fe were all remarkably lower than those in HA and CK.Meanwhile,the influence of Cistanche deserticola parasitizing to the absorbing coefficient of mineral elements in Haloxylon ammodendron was also studied.According to the absorbing coefficient,those elements could be arranged as N>P>Na>Mg>Ca>K>Mn>Fe,which was caused mainly by the fact that Cistanche deserticola belonged to the whole parasitic plant.