The microbiological activity and toxicity of oil-polluted playa solonchaks and filled grounds within the Severnye Buzachi Oil Field (Kazakhstan)статья

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Дата последнего поиска статьи во внешних источниках: 10 ноября 2014 г.

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[1] The microbiological activity and toxicity of oil-polluted playa solonchaks and filled grounds within the severnye buzachi oil field (kazakhstan) / T. G. Tynybaeva, N. V. Kostina, A. M. Terekhov, A. V. Kurakov // Eurasian Soil Science. — 2008. — Vol. 41, no. 10. — P. 1115–1123. The number of colony-forming units of microorganisms, the viable biomass, and also the intensity of the microbiological processes (respiration, nitrogen fixation, denitrification, and cellulose decomposition) in playa solonchaks and sandy-loamy filled grounds in the territory of the Severnye Buzachi Oilfields (Kazakhstan) were much lower than in other soil types attesting to the limited capability of these substrates for self-purification. Upon pollution by oil at concentrations of 100-600 mg/kg, the number of copiotrophic bacteria increased, whereas the actinomycetal and fungal populations were reduced and the biomass pool, the rates of CO2 emission, the potential nitrogen fixation, and denitrification became higher. The microbial communities of the playa solonchaks were weakly active and consumed few applied substrates. The biotesting with Artemia salina L. showed that some areas belonged to the lands of the 4th danger class, although the majority of the soil and substrate samples were not toxic. The germination of Lepidium sativum L. seeds was suppressed because of the salt toxicity, which is not related to the oil concentration (30 to 600 mg/kg). [ DOI ]

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