作　　者： ; ; ; ; ;

机构地区： 北京林业大学环境科学与工程学院

出　　处： 《生态学杂志》 2010年第8期1612-1617,共6页

摘　　要： 比较了湖南省某城市生活垃圾填埋场2个不同封场期场地优势植物超氧化物歧化酶(SOD)和过氧化氢酶(CAT)活性,发现在环境较恶劣的场地A(封场3年)齿果酸模、酸模叶蓼、水莎草SOD活性较高,分别为408.35、298.56和219.97U·mg-1 prot;稗、野菊花、女菀CAT活性较高,分别为20.72、18.10和16.42U·mg-1 prot,而臭荠的CAT活性最低,仅为3.54U·mg-1 prot。通过对各植物酶活性及相对幅度R/Q值之和进行综合比较,初步推断齿果酸模、酸模叶蓼、稗、野菊花、女菀具有较强的抵抗环境胁迫的能力,为封场初期优势植物种。场地B(封场8年)SOD活性最高的5种植物依次是:臭荠>小苜蓿>小飞蓬>齿果酸模>飞廉,而CAT活性由高到低是:朝天委陵菜>飞廉>棒头草>女菀>齿果酸模,R/Q值之和的变化范围是0.17～0.61,臭荠、朝天委陵菜、飞廉、棒头草、齿果酸模适应性较强。不同封场阶段优势物种存在着自然演替的现象,为填埋场植被恢复提供依据。 A comparative study was made on the superoxide dismutase （SOD） and catalase （CAT） activities of dominant plants growing on two closed municipal solid waste sanitary landfill in Hunan Province. On the 3-year closed landfill under poor ecological condition, the SOD activity of Rumex dentatus, Polygonum lapathifolium and Cyperus glomeratus was 408.35, 298.56 and 219.97 U·mg^-1 prot. The CAT activity of Echinochloa crusgalli, Flos chrysantheni and Aster fastigiatus was 20.72, 18.10 and 16.42 U·mg^-1 prot, respectively, while Coronopus didymus had the lowest （3.54 U·mg^-1 prot） CAT activity. Through the comprehensive comparison of the enzyme activity and the sum of R/Q, it was deduced that R. dentatus, P. lapathifolium, E. crusgalli, F. chrysantheni and A. fastigiatus had better resistance against environmental stress, being the dominant plants at the early stage of landfill closure. On the 8-year closed landfill, the plants with the highest SOD activity were C. didymus, Medicago minima, Erigeron canadensis, R. dentatus and Carduus crispus, and those with the highest CAT activity were Potentilla supina, C. crispus, Polypogon fugax, A. fastigiatus and R. dentatus. The sum of R/Q was in the range of 0.17-0.61. C. didymus, Potentilla supina, C. crispus, Polypogon fugax and R. dentatus had the stronger adaptability to the environmental stress. Natural succession of dominant plants was observed on the landfills closed for different years, which provided a basis for landfill vegetation restoration.

关 键 词： 垃圾填埋场 抗氧化酶活性 抗逆性 植被恢复

领　　域： [环境科学与工程]