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几种植物对土壤中阿特拉津的吸收富集特征及去除效率研究

DOI: 10.11654/jaes.2014.12.013, PP. 2368-2373

Keywords: 阿特拉津,污染土壤,植物修复,富集特征,去除效率

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Abstract:

通过盆栽实验比较研究了7种植物对土壤中阿特拉津的去除效率,阿特拉津在植物体内的富集、转移,以及土壤中阿特拉津去除效率与植物生物量、根系发达程度之间的关系.结果表明:植物能有效促进土壤中阿特拉津的去除,不同植物对土壤中阿特拉津的去除能力存在差异,其中去除效率最高的是皇竹草,比对照提高了40.37%,7种植物的去除率大小依次为皇竹草>斑茅>黑麦草>高羊茅>龙葵>牛筋草>香附子;不同植物的生物量、根冠比与植物对阿特拉津的去除率存在明显的正相关关系,相关系数分别为0.838、0.866;7种植物对阿特拉津均有一定的吸收、富集与转运的能力,其中皇竹草的富集系数和转运系数最高,分别为0.54和2.81,其次为斑茅和高羊茅.可见,皇竹草、斑茅和高羊茅对土壤阿特拉津污染具有较好的修复潜力.

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