华东师范大学学报(自然科学版) ›› 2009, Vol. 2009 ›› Issue (2): 50-60.

• 环境工程 地理学 • 上一篇    下一篇

重金属污染下台湾相思和尾叶桉根区土壤微生物群落多样性

康敏明1,2，陈红跃2，陈传国3，达良俊1，吴启堂4，何淑琼5   

  1. 1. 华东师范大学 环境科学系，上海200062; 2. 华南农业大学 林学院,广州510642;  3. 广东省林业调查规划院， 广州510520; 4. 华南农业大学 资源与环境学院，广州510642; 5. 广州市黄埔区农林水利局，广州510700
  • 收稿日期:2008-07-16 修回日期:2008-10-21 出版日期:2009-03-25 发布日期:2009-03-25
  • 通讯作者: 陈红跃

Microbial diversity in root zone soils of Acacia confusa and Eucalyptus urophylla polluted by heavy metals （Chinese）

KANG Min-ming1,2，CHEN Hong-yue2，CHEN Chuan-guo3，DA Liang-jun1，WU Qi-tang4，HE Shu-qiong5
  

  1. 1. Department of Environment Science, East China Normal University, Shanghai 200062, China； 2. College of Forestry, South China Agricultural University, Guangzhou 510642, China; 3. Academy of ForestrySurvey and Planning of Guangdong Province, Guangzhou 510520, China； 4. College of Environmentand Resourses Sciences， South China Agricultural University, Guangzhou 510642, China； 5. GuangzhouHuangpu Agriculture, Forestry and Water Conservancy Bureau，Guangzhou 510700, China
  • Received:2008-07-16 Revised:2008-10-21 Online:2009-03-25 Published:2009-03-25
  • Contact: CHEN Hong-yue

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摘要： 利用BIOLOG微平板技术对广州市黄埔区龟山重金属污染下台湾相思（Acacia confusa）和尾叶桉（Eucalyptus urophylla）根区土壤微生物群落多样性进行了研究.结果表明,广州市黄埔区龟山土壤重金属污染严重，其中全Cd和全Zn含量大大超出广州市背景值，并对微生物群落产生最大负效应.土壤环境的恶化导致细菌数量减少，微生物代谢活性滞后，对醣类和氨基酸类碳源利用低，多样性指数降低.黄埔区台湾相思和尾叶桉根区土壤细菌数量和微生物多样性显著高于裸地.由于重金属污染对根区土壤的影响较大，台湾相思和尾叶桉根区土壤的细菌数量、微生物碳源利用类型以及群落多样性指数均无显著差异.然而,台湾相思根区土壤微生物的代谢活性随着培养时间的延长，呈迅速上升趋势，并较其他供试土壤具有更高的代谢能力；另外，台湾相思不仅可以稳定土壤中的Cu和Pb，还能吸收Cd和Zn，并且其固氮能力能有效增加土壤养分含量，对土壤条件进行改良，也是广州市常用的造林先锋树种，适合作为广州市黄埔区重金属污染地植被重建材料.

关键词: 重金属污染, 根区土壤, 微生物群落多样性, 台湾相思, 尾叶桉, 重金属污染, 根区土壤, 微生物群落多样性, 台湾相思, 尾叶桉

Abstract: Using BIOLOG microplate technique, the microbial diversity in root zone soils of Acacia confusa and Eucalyptus urophylla polluted by heavy metals in Guishan of Huangpu area (Guangzhou) were studied. The results show that the soil of Guishan in Huangpu area is mainly polluted by total Cd and Zn, which have the badly negative influence on soil microbial community. The worse soil condition reduces bacterial amounts, delays microbial metabolic activity, lowers microbial carbohydrates and amino acides utilization and reduces microbial diversity indexes. Bacterial amounts and Microbial diversity in root zone soils are higher than soils without plant. However, because of the heavy metal pollution in Huangpu area, the bacterial amounts, microbial substrate utilization patterns and diversity indexes in the root zone soils of Acacia confusa show no significant difference with that of Eucalyptus urophylla. While, at the late stage of incubation, microbial metabolic activity in the root zone soils of Acacia confusa increases sharply and has higher metabolic capability than other soil samples. Moreover, Acacia confusa can not only stabilize the Cu and Pb in soil, but also absorb Cd and Zn. And its nitrogen fixation can enhance soil nutrients. Therefore, Acacia confusa, a popular pioneer tree in Guangzhou, is suitable for the vegetation rebuilding in the heavy metals polluted site in Huangpu area, Guangzhou.

Key words: root zone soil, microbial community diversity, Acacia confusa, Eucalyptus urophylla , heavy metal pollution, root zone soil, microbial community diversity, Acacia confusa, Eucalyptus urophylla

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