Biodegradation of diesel oil (5 g(middot)kg [soil dry weight](sup-1)) was investigated in five alpine subsoils, differing in soil type and bedrock, in laboratory experiments during 20 days at 10(deg)C. The biodegradation activities of the indigenous soil microorganisms and of a psychrotrophic diesel oil-degrading inoculum and the effect of biostimulation by inorganic fertilization (C/N/P ratio = 100:10:2) were determined. Fertilization significantly enhanced diesel oil biodegradation activity of the indigenous soil microorganisms. Biostimulation by fertilization enhanced diesel oil biodegradation to a significantly greater degree than bioaugmentation with the psychrotrophic inoculum. In none of the five soils did fertilization plus inoculation result in a higher decontamination than fertilization alone. A total of 16 to 23% of the added diesel oil contamination was lost by abiotic processes. Total decontamination without and with fertilization was in the range of 16 to 31 and 27 to 53%, respectively.
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机译:在10摄氏度20天的实验室实验中,研究了5种土壤类型和基岩不同的高山土壤中柴油(5 gmidkg [土壤干重](sup-1))的生物降解。测定了土著土壤微生物和降解精神营养性柴油的接种物的生物降解活性,以及通过无机施肥(C / N / P比= 100:10:2)进行的生物刺激作用。施肥显着增强了土著土壤微生物的柴油生物降解活性。与通过精神营养接种物进行生物强化相比,通过施肥进行生物刺激可以大大提高柴油的生物降解程度。在这五种土壤中,没有一种能比单独施肥带来更高的去污效果。非生物过程总共损失了16%至23%的添加柴油污染。不施肥和施肥的总去污率分别为16%至31%和27%至53%。
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