六种有机污染物对土壤微生物的影响

为排除实验误差的干扰，得出较为可靠的分析，本文用数理统计中“方差分析”方法研究了苯乙烯、间-二氯苯、邻-二氯苯、氯苯、邻苯二甲酸二丁酯、十六烷等六种有机污染物对自行分离鉴定的褐球固氮细菌（Azotobacter chroococcum）、纤维单胞菌（ Cellulomonas sp.)以及土壤中放线菌、霉菌、酵母菌的影响。结果表明，邻苯二甲酸二丁酯在10ppm、50ppm 两种浓度均使纤维单胞菌无一存活，其它五种污染物在两种受试浓度对土壤微生物效应各不相同。有的无显著影响，有的刺激土壤中霉菌，有的使酵母菌数量增加，有的则有一定的抑制作用。

INFLUENCE OF SIX ORGANIC POLLUTANTS ON SOIL MICROBES

Influences of six organic pollutants (styrene, m-dichlorobenzene, o-Dichlorobenzene, Chllotobenzene, Dibutyl phthalate, and Hexadecane) on pure culteureced Azotobdcter claroococrzm and Cellzrlomonas sp., as well as on actinomycetes, molds and yeasts in the soil were studied. These microbes were collected, isolated and identified by the authors from the upland soils irrigated with the water from the Datong river in Chang}zhou region of Jiangsu province. The experiment data were processed by the means of variance analysis in order to get rid of the disturbance of the experimental errors and make more reliable analysis. The results ahowed that these pollutants had different effects on different microbes at concentrations of both lOppm and 50ppm: they either decrease the counts of Azorobacter clarococczzm, Cellzzlomonas sp. and actinomycetes or increase the counts of molds and yeasts, otherwise they had no significant effect on soil microbes. Among these effects Cellzzlomoszas sp. could not be alive after dibutyl phthalate treatment at concentrations of 10 ppm and 50 ppm.