植物吸收Sr、Cs与其他元素的相关性研究

Correlated Absorbtion between Sr or Cs and other Elements of Plants

用高浓度的Sr或Cs处理土壤,采用X射线荧光光谱仪(XRF)测定植物地上部分各元素的相对含量,研究植物吸收Sr、Cs与其他元素的相关性。结果表明,高浓度Sr处理下,植物吸收Sr与Ca、Mg呈极显著正相关,与S、Na呈显著正相关,与P、Si、Fe、Zn呈极显著负相关,与K、Al呈显著负相关;高浓度Cs处理下,植物吸收Cs与其他元素的相关性均不显著,但与K的相关系数较大,为0.661 4;不施核素处理下,植物吸收微量的Sr,吸收Sr与Ca、Cl、Mg、Na、Fe、Al、Zn呈正相关,但只与Ca显著相关。因此,植物吸收Sr、Cs与其他元素有不同的相关性,在土壤核素污染的植物修复中值得注意。

Under treatment of high concentration Sr or Cs,the correlation between Sr,Cs and other elements absorbtion of plants was studied using X-ray fluorescence spectrometer determining the relative content of various elements of aerial parts of plants.The results showed that there was very significant positive correlation between Sr and Ca,Mg,significant correlation betwwen S and Na under the treatment of high concentration Sr;there was also very significant negative correlation between Sr and P,Si,Fe,Zn,and significant negative correlation between Sr and K,Al in plants.Under the treatment of high concentration Cs,no significant absorbtion correlation was showed between Cs and other elements,and the correlation between Cs and K was the highest with correlation cofficient 0.661 4.Without treatment of Sr and Cs,a little of Sr was absorbed by plants and there were positive correlations between Sr and Ca,Cl,Mg,Na,Fe,Al,Zn,but only the correlation between Sr and Ca was significant.Therefore,the correlation between Sr or Cs and other elements absorbed by plants was different,which was noteworthy in phytoremediation.