摘要
为了筛选用于锡矿区生态恢复的优势植物,对云南来利山锡尾矿废弃地进行实地调查,记录并采集了15种优势植物样本及相应根际土壤.测定其铜(Cu)、镉(Cd)、砷(As)、镍(Ni)、铅(Pb)和锡(Sn)含量,计算这15种植物对6种重金属的转移和富集系数,同时测定分析了植物根系菌根侵染率及根际土壤的化学性质,综合评估本土植物的应用潜力.结果表明,废弃地土壤pH均值为3.13,呈强酸性;有机质、全氮、全磷、全钾、碱解氮和有效磷均值分别为6.07 g·kg^(-1)、5.74 g·kg^(-1)、0.62g·kg^(-1)、8.66 g·kg^(-1)、30.84 mg·kg^(-1)和2.08 mg·kg^(-1),养分较贫瘠;土壤Cu、Cd、Ni、Pb、As和Sn含量均值分别为347.40、1.02、1.34、168.47、25.81和2 299.02 mg·kg^(-1),其中Cd的含量已达到三级污染警戒值,Cu和Pb含量大且空间分布差异大,呈现Cu、Pb和Cd复合污染的风险.此外,木犀榄(Olea europaea L.)和柃木(Eurya japonica Thunb.)根系的菌根侵染率相对较高,桤木(Alnus cremastogyne Burk.)、小丝琴竹[Bambusa multiplex (Lour.) Raeusch.ex Schult.‘Alphonse-Kar’R.A.Young]、灯心草(Juncus effusus L.)和莎草(Cyperus rotundus L.)等对重金属有较强的吸收和转运能力,其余植物也适应锡尾矿废弃地的生长环境,具有修复该矿区的潜在价值.
To investigate the dominant plants in ecological restoration of tin mining areas,field investigations were conducted in a tin tailings area in Lailishan,Yunnan Provence,and 15 dominant plants and corresponding rhizosphere soils were collected.The plant root mycorrhizal infection rate;the copper(Cu),cadmium(Cd),arsenic(As),nickel(Ni),lead(Pb),and tin(Sn) contents;and the chemical properties of the rhizosphere tailings were determined.The transfer and enrichment coefficients of six heavy metals were calculated for each of the 15 plants to comprehensively evaluate the application potential of native plants.The rhizophere tailings had an average pH value of 3.13,which was acidic.The organic matter,total nitrogen,total phosphorus,total potassium,alkaline hydrolyzed nitrogen,and available phosphorus content of the soils was 6.07 g·kg^(-1),5.74 g·kg^(-1),0.62 g·kg^(-1),8.66 g·kg^(-1),30.84 mg·kg^(-1),and 2.08 mg·kg^(-1) respectively,indicating relatively nutrient-poor soil.The average Cu,Cd,Ni,Pb,As,and Sn contents of the soils were 347.40,1.02,1.34,168.47,25.81,and 2 299.02 mg·kg^(-1),respectively.Among the heavy metals,the Cd content reached a third-level pollution warning value.The soil also contained a large amount of Cu and Pb which exhibited a different spatial distribution.This area appears to have a high risk of Cu,Pb,and Cd pollution.In addition,the roots of Olea europaea L.and Eurya japonica Thunb.had a high rate of mycorrhizal infection.Alnus cremastogyne Burk.,Bambusa multiplex(Lour.) Raeusch.ex Schult.‘Alphonse-Kar’R.A.Young,Juncus effusus L.,and Cyperus rotundus L.var.had a strong ability to absorb and transport heavy metals.The other plants were also adapted to the growth environment of the tin tailings,with the potential to restore the mining area.
作者
秦芙蓉
张仕颖
夏运生
张乃明
吴程龙
何忠俊
岳献荣
田森林
QIN Fu-rong;ZHANG Shi-ying;XIA Yun-sheng;ZHANG Nai-ming;WU Cheng-long;HE Zhong-jun;YUE Xian-rong;TIAN Sen-lin(College of Resources and Environment,Yunnan Agricultural University,Kunming 650201,China;Yunnan Engineering Laboratory of Soil Fertility and Pollution Remediation,Kunming 650201,China;College of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650500,China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2021年第8期3963-3970,共8页
Environmental Science
基金
国家重点研发计划项目(2018YFC1802603,2018YFD0800603)
云南省重点研发计划项目(2018BC004-02)。
关键词
锡尾矿废弃地
本土植物
筛选
重金属
转运与富集
tin tailings wasteland
native plants
select
heavy metals
transport and enrichment
