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天然蒙脱石和沸石改良对黑麦草在铜尾矿砂上生长的影响
引用本文:郝秀珍,周东美,薛艳,陈怀满.天然蒙脱石和沸石改良对黑麦草在铜尾矿砂上生长的影响[J].土壤学报,2005,42(3):434-439.
作者姓名:郝秀珍  周东美  薛艳  陈怀满
作者单位:土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所),南京,210008
基金项目:中国科学院知识创新工程项目(KZCX2-401),中国科学院南京土壤研究所所长基金项目资助
摘    要:通过温室盆栽试验,开展了天然蒙脱石和沸石处理对黑麦草在铜矿尾矿砂上生长影响的研究。结果表明:蒙脱石和沸石改良对黑麦草的地上部生物量没有显著影响,但改变了黑麦草的根重;而施用肥料促进了黑麦草生长。蒙脱石的加入使尾矿砂的有效态锌含量显著降低,但对有效态铜的含量影响不明显;而沸石的加入均显著降低了尾矿砂的有效态铜和锌的含量;另外,矿物的加入降低了尾矿砂的pH值,但其变化与尾矿砂重金属有效态含量变化之间无相关性。矿物的加入降低了黑麦草根中的铜锌吸收,但蒙脱石增加了第一茬黑麦草地上部铜锌吸收,对第二茬黑麦草地上部铜锌吸收无影响;而沸石对两茬黑麦草地上部铜锌含量均无显著影响。不同生长期黑麦草对铜锌吸收量有差异,第二茬黑麦草的地上部锌含量明显高于第一茬,而铜含量则变化不大。

关 键 词:尾矿砂  黑麦草  重金属  蒙脱石  沸石
收稿时间:2004/6/14 0:00:00
修稿时间:2004/11/12 0:00:00

RYEGRASS GROWTH IN Cu MINE TAILINGS AMENDED WITH NATURAL MONTMORILLONITE AND ZEOLITE
Hao Xiuzhen,Zhou Dongmei,Xue Yan and Chen Huaiman.RYEGRASS GROWTH IN Cu MINE TAILINGS AMENDED WITH NATURAL MONTMORILLONITE AND ZEOLITE[J].Acta Pedologica Sinica,2005,42(3):434-439.
Authors:Hao Xiuzhen  Zhou Dongmei  Xue Yan and Chen Huaiman
Institution:State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
Abstract:In metal mining areas, mine tailings, as an accessory product, are usually stored in a big tailings dump, destroying original vegetations and seriously damaging ecological systems. To restore vegetations over metal mine tailings is very difficult because they are often high in heavy metal concentration, low in nutrient content and small in water retention capacity. Pot experiments were conducted to investigate effects of application of natural montmorillonite and zeolite as amendments to mine tailings on ryegrass growth and uptake of Cu and Zn in this paper. The results indicate that the biomass of the ground part of ryegrass did not change much but its root weight changed with the application of the two clays, respectively. Chemical fertilizer was extremely necessary for ryegrass growth in the mine tailings. Application of montmorillonite decreased available Zn in the mine tailings, but did not affect much available Cu; application of zeolite significantly decreased both available Cu and Zn in the mine tailings. The pHs of the mine tailings decreased with the application, but did not correlate with the change in available Cu and Zn in the mine tailings. Copper and Zn concentrations in ryegrass root decreased with the application of the clays. However, application of montmorillonite increased Cu uptake but did not affect Zn uptake of the ground part of ryegrass in the first and the second harvest. Application of zeolite did not change the Cu and Zn concentrations in the ground part of ryegrass, either.
Keywords:Mine tailings  Ryegrass  Heavy metal  Montmorillonite  Zeolite
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