本文選題：藏中礦區(qū)　切入點：先鋒植物　出處：《草地學報》2016年03期

【摘要】：西藏中部礦區(qū)重金屬污染嚴重,在礦區(qū)廢棄地的先鋒植物中篩選和研究適合當?shù)貧夂蚺c土壤條件的重金屬耐性植物,是藏中礦區(qū)植被恢復和污染土壤修復的前提。本研究采用野外調查取樣,并結合室內分析測試來進行。對礦區(qū)尾礦庫生長的6種先鋒植物及其土壤重金屬含量進行測定分析,結果表明:拉屋礦區(qū)尾礦庫重金屬污染嚴重,并且土壤受到Zn,Cu,Pb,Cd元素的復合污染;6種先鋒植物均能適應礦區(qū)土壤重金屬元素較高的環(huán)境,對重金屬具有一定的耐性;6種植物對重金屬的吸收表現(xiàn)出3種特征:尼泊爾酸模(Rumex nepalensis)和紫羊茅(Festuca rubra)屬于富集型植物;高山嵩草(Kobresia pygmaea)、高原蕁麻(Urtica hyperborea)、珠芽蓼(Polygonum viviparum)屬于根部囤積型植物;垂穗披堿草(Elymus nutans)屬于重金屬規(guī)避型植物;在復合污染條件下,尼泊爾酸模對Zn的吸收超過1000mg·kg-1,高原蕁麻對Cd的吸收超過50mg·kg-1,高原蕁麻和尼泊爾酸模具備超富集植物的特征和潛能,對尾礦庫區(qū)重金屬污染有較強的耐性,可作為治理該地區(qū)污染環(huán)境的修復材料。
[Abstract]:Heavy metal pollution is serious in the mining area of central Tibet. Screening and studying heavy metal tolerant plants suitable for local climate and soil conditions in the pioneer plants in mining wasteland is the premise of vegetation restoration and remediation of contaminated soil in mining areas in Tibet.This study was carried out by field survey and indoor analysis.The contents of heavy metals in six vanguard plants and their soils were determined and analyzed. The results showed that the heavy metal pollution of tailings pool was serious in Lawu mining area.Moreover, six pioneer plants, which were polluted by Zn, Cu, Pb, CD, could adapt to the environment with higher heavy metal elements in the soil of the mining area.The absorption of heavy metals by six species of plants showed three characteristics: Rumex nepalensis) and Festuca rubra were enriched plants.Kobresia pygmaeaer, Urtica hyperboreaer, Polygonum viviparum) belong to the root hoarding plant, Euphorbia nutansa belongs to heavy metal evading type, and under the condition of complex pollution, it belongs to the type of heavy metal evading plant.The absorption of Zn by Nepalese acid model exceeded that of 1000mg kg-1, and the absorption of CD by urticaria was higher than that of 50mg kg-1.The plants of highland urticaria and Nepalese acid had the characteristics and potential of super-enrichment, and they had strong tolerance to heavy metal pollution in tailings reservoir area.The utility model can be used as a remediation material for environmental pollution in this area.
【作者單位】： 西藏大學農(nóng)牧學院;
【基金】：國家自然基金(31160312)(31560142)資助
【分類號】：X173;X751

【相似文獻】

相關期刊論文 前1條

1 趙娜;李元;祖艷群;;金屬礦區(qū)先鋒植物與廢棄地的植被恢復[J];云南農(nóng)業(yè)大學學報;2008年03期

，

本文編號：1719651