or

• Main Authors: Andrew Pond, Ian Snape, John Rayner
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 2005
• Subjects: Hydrocarbon contamination; Macquarie Island; Nitrogen; Fertilization; Osmotic stress
• 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

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