农业环境科学学报2012，Vol.31Issue(5)：913-919,7.
Hg的土壤酶效应初步研究
Impact of Mercury on Soil Enzyme Activity
摘要
Abstract
Mercury(Hg) is one of heavy metals which can lead to serious environment pollution. It is of great importance in terms of theory and application to investigate the eco-toxicity of Hg on soil enzyme activity. This article used laboratory simulation methods to explore the relationships between Hg and soil urease, alkaline-phosphalase, invertase, and dehydrogenase which play a significant role in the cycles of carbon, nitrogen, phosphate and microbiological activity using four representative soils including cinnamon, sandy soil, lou soil, red soil. The results showed that Hg could inhibit the activities of soil alkaline-phosphatase and invertase without evident regularity. Hg could substantially inhibit soil urease activity at high concentrations, while slightly increased soil urease at low concentrations. Similarly, Hg could dramatically inhibit soil dehydrogenase activity and the total enzyme index(TEI). Significantly or highly significantly negative correlations existed between Hg and soil urease, dehydrogenase, and TEI. Therefore, they could be used as indicators to evaluate Hg pollution in soils; especially TEI, as an overall index parameter, could be used other than individual indicators. The critical values of ED10 for all soils were among 0.000 5 mg·kg-1and 0.59 mg·kg-1. Both soil organic matter and pH affected the value of EDm.关键词
Hg/土壤酶/生态毒理/总体酶活性/生态剂量Key words
Hg/ soil enzyme/ ecotoxicology/ TEI/ ecology dose分类
资源环境引用本文复制引用
田海霞,和文祥,乔园,吕家珑,韦革宏..Hg的土壤酶效应初步研究[J].农业环境科学学报,2012,31(5):913-919,7.基金项目
"863"计划项目"农业生境监测检查与修复技术研究"(2012AA100602) （2012AA100602）
农业部公益性行业(农业)科研专项(200903015) （农业）
