Journal article
Degradation of the Nitrification Inhibitor 3,4-Dimethylpyrazole Phosphate in Soils: Indication of Chemical Pathways
PK Sidhu, BI Taggert, D Chen, U Wille
ACS Agricultural Science and Technology | AMER CHEMICAL SOC | Published : 2021
Abstract
Nitrogen fertilizers amended with nitrification inhibitors (NIs) are used to increase nitrogen use efficiencies in agricultural systems. 3,4-Dimethylpyrazole phosphate (DMPP) is the most successful commercial NI to date but has a highly variable efficacy. To explore whether degradation could contribute to its inconsistent performance, incubation studies were performed with DMPP and 3,4-dimethylpyrazole glycolate (DMPG) in two alkaline clay soils that were treated with the fertilizer ammonium sulfate ((NH4)2SO4). Analysis of the soil extracts revealed a qualitative correlation between the amount of NI present in the soil and inhibition efficiency as well as several degradation products result..
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Awarded by Australian Research Council
Funding Acknowledgements
This work was supported by the Australian Research Council through the Industrial Transformation Research Hub (IH200100023) and Linkage (LP160101417) Schemes and the Australia-China Joint Research Centre "Healthy Soils for Sustainable Food Production and Environmental Quality". We thank Assoc. Prof. Helen Suter and Dr. Shu Kee Lam for helpful discussions and Dr. Thushari Wijesinghe, Dr. Roya Khalil, and Dr. Timothy Hughes for their support. Support by the Melbourne TrACEES Platform (Trace Analysis for Chemical, Earth and Environmental Sciences) and the Mass Spectrometry and Proteomics Facility (MSPF) in the Bio21 Institute, The University of Melbourne, is gratefully acknowledged.