摘要
通过现场采样及室内测试,对粤北大宝山下游受酸性矿山废水污染的稻田土壤的重金属污染及土壤酶活性进行了研究。运用通径分析方法研究了稻田土壤重金属污染与土壤酶(脲酶、磷酸酶、过氧化氢酶和蔗糖酶)活性之间的关系。结果表明,被酸性矿山废水污染的稻田土壤环境已受到不同程度的Cd、Zn、Pb、Cu污染。受污染的稻田土壤有效态Zn和Cu对土壤脲酶活性有一定程度的抑制作用,但不显著。有效态Pb和Cu是影响磷酸酶活性的主要因素,既有直接抑制作用,又具有一定程度的间接抑制影响。有效态Pb和Cu是影响过氧化氢酶活性的主要因素,有效态Pb对过氧化氢酶活性具有强烈的直接抑制效应,有效态Cu对过氧化氢酶活性既有直接抑制作用,又具有一定程度的间接抑制效应。有效态Cd对蔗糖酶活性具有强烈的直接抑制作用,有效态Zn对蔗糖酶活性有强烈的间接抑制影响。
Heavy metal contents and soil enzymatic activities were investigated in paddy soils contaminated by acid mine drainage in the lower stream of Dabaoshan mine area, Guangdong Province. Relationships between soil enzyme （urease, phosphatase, catalase, and invertase） activities and heavy metals （Cd, Zn, Pb, and Cu） were analyzed by the method of path analysis. Results revealed that the studied paddy soils have suffered from acid mine drainage pollution of Cd, Zn, Pb and Cu to different degrees. The activity of urease was inhibited by available amount of Zn and Cu, but the inhibitive effect was not significant. Availble amount of Pb and Cu was the major factor influencing the activity of phosphatase. The activity of phosphatase was inhibited by available amount of Pb and Cu directly and indirectly. Availble amount of Pb and Cu was the major factor influencing the activity of catalase. The activity of catalase was mostly inhibited by available amount of Pb. The activity of catalase was inhibited by available amount of Cu directly and indirectly. The activity of invertase was mostly inhibited by available amount of Cd directly. The activity of invertase was mostly inhibited by available amount of Zn indirectly.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2008年第5期1803-1808,共6页
Journal of Agro-Environment Science
基金
广东省自然科学基金团队项目(06202438)
中山大学985工程环境污染控制与修复技术创新平台项目
关键词
酸性矿山废水
重金属污染
稻田土
土壤酶活性
acid mine drainage
heavy metal contamination
paddy soil
soil enzymatic activities
