Abstract:

By pot experiment,we studied the impacts of petroleum pollutants on rape bio-mass, microbial population and the petroleum pollutants residue in soil.The results showed that petroleum pollutants could promote rape growth when the petroleum hydrocarbon consistency <500 mg/kg, shown as the increase of rape bio-mass; when the petroleum hydrocarbon consistency was 500 mg/kg, petroleum pollutants has a great influence on microbial population, the amont of actinomycete dramatic decreased, while the amount of bacterium and fungi increased on some degree. After harvest of rape, the petroleum pollutants residue in soil was <300mg/kg.When the petroleum hydrocarbon consistency >500mg/kg, growth of rape was inhibited and the biomass of rape decreased. The amount of bacterium presented the downward trend with the increase of petroleum hydrocarbon consistency, the amont of actinomycete kept on decrease, and the amount of fugi was not obviously affected.Consolidate the various indicators, it was tentatively scheduled for cinnamon soil, critical concentration of petroleum hydrocarbons on rape was scheduled for 500mg/kg.