抗污草种筛选利用试验初报

为解决我国南方冶炼厂矿企业重污区绿化抗污草种缺乏的难题，选用１０个不同类型，适合南方亚热带气候、土壤等自然条件下种植的多年生草本植物，在株洲冶炼厂重污区进行了集中抗污品比试验。同时，对１０个参试草种的主要有毒成分蓄积量进行了分析测定。结果表明，在厂内重污区生长较好、抗污能力强的草种有天堂４１９、岸杂１号狗牙根、本地狗牙根、结缕草等４个草种。在８种有毒成分中，试验区与对照区区相比，天堂４１９的砷、铅

Preliminary report on the selection and application of antipollution grass species

To solve the problem about the absence of antipollution grass species at the seriouslypolluted area of the industry of metallurgy and minerals in south of China. Ten perennial grass species suitable for subtropics natural conditions were selected to conduct a control experiment of antipollution collectively at the seriously polluted areas in Zhuzhou smeltery. Eight main poisonous ingredients in those ten varieties were analyzed as well. The results showed that 4 grass species which had more antipollution ability and grew better at the seriously polluted areas were Tifway 419, Coastcross I, Bermulda grass, Zoysia japonica . Among the 8 poisonous ingredients, compared with the control areas, the contents of As, Pb, Cd, Cu in Tifway 419 were 126, 53, 55, 21.75 folds of those of control areas respectively, the contents of As, Zn, Pb, Cd in Coastcross I, Bermuda grass were 35.71, 34.07, 19.09, 14.17 folds of those of control areas respectively , the contents of Zn, As, Pb in Zoysia japonica] were 128, 1 066, 60 folds of those of control areas respectively, the contents of Cd, Pb, As in Zoysia japonica were 570, 83.3, 80 folds of those of control areas. The other six grass species could survive after transplanted in the seriously polluted area but they died later after growing for some time. The contents of the 8 poisonous ingredients within the six species were all higher than those of control areas.