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A framework for analysing nitrification inhibition: A case study on 3,4-dimethylpyrazole phosphate (DMPP).

08:00 EDT 5th April 2019 | BioPortfolio

Summary of "A framework for analysing nitrification inhibition: A case study on 3,4-dimethylpyrazole phosphate (DMPP)."

Nitrification inhibitors show great potential to reduce nitrogen losses from agricultural systems and to improve nitrogen use efficiency. The most recently developed nitrification inhibitor 3,4-dimethylpyrazole phosphate (DMPP) is gaining popularity due to its benefits relative to other compounds. However, the behaviour of DMPP and its effect on nitrification in soils has been characterised using inconsistent and confusing terminology. Many studies have used the term half-life to describe the persistence of DMPP but used different experimental methods to derive it leading to highly variable results. We assessed how different methodologies in experiments may have contributed to the variability in the results using a framework that describes the behaviour of DMPP and its effect on nitrification in terms of: persistence, bioactivity and longevity. We show that deriving the persistence of DMPP using C labelling techniques is challenging because it requires consideration of other C pools in the soil. We also describe the limitations of soil inorganic nitrogen measurements to characterise the bioactivity and longevity of the inhibitory effect on nitrification. We conclude by proposing experiments that can facilitate the evaluation of the benefits of DMPP across broader scales. While this study focused on DMPP, the concepts presented here are equally relevant to other nitrification inhibitors.

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This article was published in the following journal.

Name: The Science of the total environment
ISSN: 1879-1026
Pages: 846-854

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