峰峰矿区丛枝菌根优势植物重金属积累的比较

Comparision on Accumulation of Heavy Metals in Dominant Arbuscular Mycorrhizal Plants in the Fengfeng Coal Mining Area

以峰峰五矿、九龙矿、梧桐庄矿的狗尾草和猪毛蒿为研究对象,测定了丛枝菌根真菌侵染率,并采用火焰原子吸收分光光度法分别测定了植物和土壤中Pb、Cu、Zn、Cr、Mn的含量,通过计算转移系数和富集系数,比较分析了3个矿区中二者对5种重金属的吸收和积累,以期为利用植物-丛枝菌根真菌修复土壤重金属污染提供参考依据。结果表明:狗尾草和猪毛蒿形成的菌根侵染率在梧桐庄矿均为最高,分别达到86.667%和49.033%,自然条件下二者能够与丛枝菌根真菌形成良好的共生关系。狗尾草对Pb和Zn的积累在梧桐庄矿均较优,其中狗尾草地上部Pb含量、地下部Pb含量、转移系数和富集系数分别达到24.157 mg·kg^-1、19.139 mg·kg^-1、1.262和0.156,以及地上部Zn含量、转移系数和富集系数分别达到42.295 mg·kg^-1、1.127和0.259,不仅高于梧桐庄矿的猪毛蒿,也高于五矿和九龙矿的狗尾草。对Cr的积累,狗尾草和猪毛蒿均为五矿高于其它矿区,并且同一矿区狗尾草也高于猪毛蒿。对Cu和Mn的积累,不同矿区2种植物表现不一致,表明不同植物对重金属的吸收积累具有差异。

Infection rate of arbuscular mycorrhizal fungi in Setaria viridis and Artemisia scoparia collected from the Fifth,Jiulong and Wutongzhuang of Fengfeng coal mining areas were detected.And the contents of Pb,Cu,Zn,Cr and Mn in plants and soil were studied using flameatomic absorption spectrophotometry,respectively.The absorption and accumulation of two plans with five kinds of heavy metal in the three mining area also were compared by calculating transfer coefficient and enrichment coefficient.In order to provide theoretical support for using plant-arbuscular mycorrhizal fungi to repair soil heavy metal pollution.The results showed that the infection rates of mycorrhiza with S.viridis and A.scoparia were the highest in Wutongzhuang mine,reaching 86.667%and 49.033%respectively.Under natural conditions,they could form a good symbiotic relationship with arbuscular mycorrhizal fungi.The accumulation of Pb and Zn of S.viridis in Wutongzhuang mine were better,the aboveground Pb content,underground Pb content,transfer coefficient and enrichment coefficient of S.viridis were reached 24.157 mg·kg^-1,19.139 mg·kg^-1,1.262,and 0.156.And Zn content of the aboveground,transfer coefficient and enrichment coefficient were reached 42.295 mg·kg^-1,1.127,and 0.259.Not only it was higher than S.viridis in the Fifth and Jiulong mine,but it was also higher than A.scoparia.The accumulation of Cr was higher in both of them than in other mining areas,andthis metricof S.viridis in the same mining area was also higher than that of S.viridis.For the accumulation of Cu and Mn,two kinds of plants in different mining areas showed inconsistent performance,which indicated that the absorption and accumulation of heavy metals by different plants were different.