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625 mg kg−1 treatment was slightly lower than that in the untreated soil, although they were not statistically different. Respiration was maximized when NH2O was 604 mg nitrogen kg −1 H2O, and was depressed when it reached 1800 mg N kg −1 H2O. Residual Nutrients are required to support soil microbia...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
2005
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.586.3649 http://swes.cals.arizona.edu/soil_fertility/Publications/Macca respiration.pdf |
| Summary: | 625 mg kg−1 treatment was slightly lower than that in the untreated soil, although they were not statistically different. Respiration was maximized when NH2O was 604 mg nitrogen kg −1 H2O, and was depressed when it reached 1800 mg N kg −1 H2O. Residual Nutrients are required to support soil microbial hydrocarbon degradation in cold region soils (Mohn and Stewart, 2000). Treating petroleum-contaminated soil with N can increase cell growth rate (Hoyle et al., Cold Regions Science and Technoloactivity and, therefore, bioremediation. Although thesoil petroleum following incubation was least in soil amended with 125 mg N kg−1 (NH2O=604) and was greater in unfertilized soils or in soils receiving 250 mg N kg−1 or more (NH2O≥1202). Thus, the rate of bioremediation was maximized when NH2O was maintained below 1200 mg N kg−1 soil H2O. Whereas previous studies have indicated that bioremediation in polar and sub-polar region soils are inhibited by nitrogen amendments above 2500 mg N kg−1 H2O, results from this study indicated inhibition at a |
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