摘要
在实验室中用同位素示踪法，研究了土壤中不同石油污染量对氮矿化及硝化速率的影响。结果表明，石油对土壤中有机氮的矿化没有显著影响，但减缓了硝化反应的进程。土壤经过１０ｄ的培养，在未污染的土壤中硝化细菌数量由１．６×１０３增加到１．６×１０６，而在受石油污染的土壤上，硝化细菌数量仅增加到６．３×１０４；增加试验前土壤硝化菌数量为２．６×１０６，加油培养１０ｄ后，硝化细菌数量下降了近９０％。
Isotope dilution method was adopted in lab for the study of the effect of crude oil contamination on the rate of nitrogen mineralization and nitrification in soil. The results of the study showed that the organic nitrogen mineralization rate was not significantly affected by crude oil, while the nitrification process was delayed owing to the presence of crude oil. After 10 d of incubation, the number of ammoni oxidizing bacteria in soil with no crude oil been added increased from 1.6×10 3 to 1.6×10 6,while in the soil with crude oil added the number of ammoni oxidizing bacteria only increased to 1.6×10 4. In another test, the number of soil ammoni oxidizing bacteria was 2.6×10 6 before test, then adding crude oil, after 10 d of incubation the number of bacteria declined to only 10% of that ofthe original one.
出处
《农村生态环境》
CSCD
1998年第1期39-42,共4页
Rural Eco-Environment
基金
国家环境保护局资助
关键词
石油
土壤氮素
土壤污染
土壤肥力
crude oil, contamination, soil, nitrogen, mineralization, nitrification
