【摘要】 对生长于云南鸡冠山铜矿渣上的艾蒿(Artemisiaargyi)和湖北铜绿山铜矿渣上的滨蒿(Artemisiascoparia)进行调查和铜含量测定,结果表明,2种菊科植物具有比较高的生物量,均为铜矿区的优势植物,其根周围土壤的铜含量高。艾蒿根和叶的铜含量都较高,其根部铜含量为41～156mg·kg-1,平均83±29mg·kg-1;叶部铜含量为58～464mg·kg-1,平均216±96mg·kg-1。滨蒿根部铜含量较高,其变化范围为58～513mg·kg-1,平均183±101mg·kg-1,而茎叶部铜含量相对于根部较低,为42～259mg·kg-1,平均97±52mg·kg-1(含铜量均以干重计)。研究还发现,2种植物对铜的耐受机制不同,艾蒿表现出较强的蓄积铜的潜力,而滨蒿表现出对铜污染土壤的植物固定潜能,因此2者均可作为植物修复铜污染土壤的先锋物种。更多还原

【Abstract】 A field survey and sampling for chemical analysis was carried out to investigate copper contents in Artemisia argyi and Artemisia scoparia.A.argyi grew dominantly on copper mining spoils at Jiguanshan,Yunnan Province and A.scoparia widely distributed at Tonglüshan,Hubei Province.Both species were found to grow vigorously on the copper mining spoils with comparatively large biomass.The rooting zone soils supporting both species containing high concentrations of copper.Study results showed that A.argyi accumulated a large amount of copper in roots and leaves,ranging from 41 to 156 mg·kg^-1 or averaging 83±29 mg·kg^-1,and from 58 to 464 mg·kg^-1 or 216±96 mg·kg^-1 in average,respectively.A.scoparia accumulated higher copper in roots than in shoots in most cases ranging from 58 to 513 mg·kg^-1 or averaging 183±101 mg·kg^-1 with the former and from 42 to 259 mg·kg^-1 or 97±52 mg·kg^-1 in average with the latter.It was also found that A.argyi had higher leaf/root ratios（leaf/root>1）than A.scoparia（shoot/root<1）in terms of copper concentration.These results may suggest that both species could survive on soils contaminated with copper by different mechanisms.It was suggested that A.argyi possessed potential for phytoextraction and A.scoparia for phytostabilization,and that both had the potential to serve as pioneer species for phytoremediation of copper-contaminated soils.更多还原