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Pakistan Journal of Biological Sciences
  Year: 2000 | Volume: 3 | Issue: 5 | Page No.: 812-815
DOI: 10.3923/pjbs.2000.812.815
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Influence of Nitrification Inhibitor on Transformations and Recovery of N in Grassland Soil

M. K. Abbasi and W. A. Adams

The recovery of both mineralized and applied N in soil-plant system is low throughout the world. Leaching, denitrification and NH3 volatilization are thought to be the major N loss mechanisms responsible for low N recovery. The aim of this study was to evaluate the effect of nitrification inhibitor nitrapyrin on N transformations, recovery and to prevent formation of -N which could be lost by leaching and denitrification. Intact soil cores were collected from a grassland field, incubated under aerobic conditions at 20°C with 70 percent WFPS. Amendments used were plus or minus and plus or minus nitrapyrin. Nitrapyrin was used as a nitrification inhibitor. The fate of mineralized and added , accumulation of -N and apparent recovery of applied N were examined during the study. In the absence of nitrpyrin, more than 60 percent of the -N initially present was lost within 42 days period. The apparent recovery of applied N decreased significantly and more than 50 percent of applied N being lost from mineral pool. Accumulation of 60 mg -N kg–1 soil in the surface 0-2.5 cm layer indicated that nitrification was an active process in the system. Addition of nitrapyrin decreased and delayed the extent of disappearance, inhibited nitrification by approximately 73 percent and improved N recovery by 36 percent.
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How to cite this article:

M. K. Abbasi and W. A. Adams, 2000. Influence of Nitrification Inhibitor on Transformations and Recovery of N in Grassland Soil. Pakistan Journal of Biological Sciences, 3: 812-815.

DOI: 10.3923/pjbs.2000.812.815






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