Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/55406
Title: 3,4-Dimethylpyrazole phosphate (DMPP) reduces nitrogen leaching in three tropical soils and improves the agronomic efficiency of nitrogen fertilizers applied to cotton
Keywords: Gossypium hirsutum L.
Nitrate and ammonium leaching
Leaching column study
Urea
Ammonium sulfate nitrate
Issue Date: 2022
Publisher: Springer
Citation: PAULO, E. N. de et al. 3,4-Dimethylpyrazole phosphate (DMPP) reduces nitrogen leaching in three tropical soils and improves the agronomic efficiency of nitrogen fertilizers applied to cotton. Journal of Soil Science and Plant Nutrition, [S.l.], v. 22, p. 2520–2533, 2022.
Abstract: Nitrification inhibitors applied to soil could reduce nitrogen (N) fertilizer leaching losses by delaying the nitrification process via enhanced N fertilizer management. Thus, we investigated the agronomic efficiency of the nitrification inhibitor 3,4-dimethylpyrazole phosphate (DMPP) applied in three tropical soils (Typic Quartzipsamment, Typic Hapludox and Rhodic Hapludox) cultivated with cotton plants, evaluating the fate of N (NH4+-N, NO3−-N, and total N in leached water and soil), N accumulation and N use efficiencies (agronomic, physiological, and recovery efficiencies). Five treatments were tested with each treatment consisting of two N sources applied, urea (U) and ammonium sulfate nitrate (ASN), either with or without DMPP application; an additional control treatment (absence of N application) was also tested. Leaching columns were used to assess NH4+-N and NO3−-N losses. DMPP improved the recovery efficiency from applied U and ASN fertilizers by reducing NO3−-N and NH4+-N leaching, leading to enhanced N acquisition from fertilizer and augmenting plant N accumulation and biomass. We found that agronomic efficiency in cotton plants increased from 4 to 52% with the DMPP + ASN source relative to ASN along the soil types. In addition, DMPP use increased agronomic efficiency from urea application from 32 to 91% relative to conventional urea. The use of DMPP would benefit from more urea than ASN mainly in sandy-textured soils, where the leaching losses were observed to be increased. The reduction in NO3−-N and NH4+-N losses highlights the potential of DMPP to mitigate the impact of N-based fertilizer application on N leaching, thereby improving agronomic efficiency, N uptake, and cotton growth–related responses under tropical soil conditions.
URI: https://link.springer.com/article/10.1007/s42729-022-00824-w
http://repositorio.ufla.br/jspui/handle/1/55406
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