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Title

CARBON DYNAMICS IN A CRUDE OIL POLLUTED SANDY SOIL IN THE PRESENCE OF VARIOUS N FORMS

Pages

 Start Page 307 | End Page 321

Abstract

 The objective of the present study was to investigate the influences of CRUDE OIL and various N FORMs application on C dynamic in a sandy soil. The experiment was conducted as factorial (3×4) arranged in a completely randomized design with three replicates under laboratory conditions during 126 days. Sandy soil samples were first contaminated with 5% and 10% CRUDE OIL levels and, then, N salts of KNO3, NH4Cl, and a mixture of them were added. Soil samples were placed at 25±1oC in incubator for 126 days to determine MICROBIAL RESPIRATION at weekly intervals. Results indicated that N addition to sandy soil would cause soil microbial communities stimulation.The addition of CRUDE OIL and N simultaneously, caused the 10% oil level and NH4-treated soils to show the maximum C mineralization. In short, CRUDE OIL has positive and negative interactions with soil microorganisms. However, application of N fertilizes in proper form to petroleum-polluted environments may cause the reduction of harmful effects of toxic hydrocarbon compositions on soil microbial communities.

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