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Effects of a Nitrification Inhibitor on Nitrogen Species in the Soil and the Yield and Phosphorus Uptake of Maize5.48 MB
Accepted VersionCC BY-NC-ND V4.0, Open Access
Journal article
Effects of a Nitrification Inhibitor on Nitrogen Species in the Soil and the Yield and Phosphorus Uptake of Maize
Science of the Total Environment, Vol.715, pp.136895-136895
2020
PMID: 32007883
Abstract
Phosphorus (P) resource availability is declining and the efficiency of applied nutrients in agricultural soils is becoming increasingly important. This is especially true for P fertilizers from recycled materials, which often have low plant availability. Specific co-fertilization with ammonium can enhance P plant availability in soils amended with these P fertilizers, and thus the yield of plants. To investigate this effect, we performed a pot experiment with maize in slightly acidic soil (pH 6.9) with one water-soluble (triple superphosphate [TSP]) and two water-insoluble (sewage sludge-based and hyperphosphate [Hyp]) P fertilizers and an ammonium sulfate nitrate with or without a nitrification inhibitor (NI). The dry matter yield of maize was significantly increased by the NI with the Hyp (from 14.7 to 21.5 g/pot) and TSP (from 40.0 to 45.4 g/pot) treatments. Furthermore, P uptake was slightly increased in all three P treatments with the NI, but not significantly. Olsen-P extraction and P K-edge micro-X-ray absorption near-edge structure (XANES) spectroscopy showed that apatite-P of the water-insoluble P fertilizers mobilized during the plant growth period. In addition, novel nitrogen (N) K-edge micro-XANES spectroscopy and the Mogilevkina method showed that the application of an NI increased the fixation of ammonium in detectable hot spots in the soil. Thus, the delay in the nitrification process by the NI and the possible slow-release of temporarily fixed ammonium in the soil resulted in a high amount of plant available ammonium in the soil solution. This development probably decreases the rhizosphere pH due to release of H+ by plants during ammonium uptake, which mobilizes phosphorus in the amended soil and increases the dry matter yield of maize. This is especially important for water-insoluble apatite-based P fertilizers (conventional and recycled), which tend to have poor plant availability.
Details
- Title
- Effects of a Nitrification Inhibitor on Nitrogen Species in the Soil and the Yield and Phosphorus Uptake of Maize
- Authors
- Christian Vogel (Author) - Federal Institute for Materials Research and Testing, GermanyRyo Sekine (Author) - Griffith UniversityJianyin Huang (Author) - University of South AustraliaDaniel Steckenmesser (Author) - Justus-Liebig University, GermanyDiedrich Steffens (Author) - Justus-Liebig University, GermanyThomas Huthwelker (Author) - Paul Scherrer Institute, SwitzerlandCamelia N Borca (Author) - Paul Scherrer Institute, SwitzerlandAna E Pradas del Real (Author) - ESRF - The European Synchrotron, FranceHiram Castillo-Michel (Author) - ESRF - The European Synchrotron, FranceChristian Adam (Author) - Federal Institute for Materials Research and Testing, Germany
- Publication details
- Science of the Total Environment, Vol.715, pp.136895-136895
- Publisher
- Elsevier BV
- Date published
- 2020
- DOI
- 10.1016/j.scitotenv.2020.136895
- ISSN
- 0048-9697; 1879-1026
- PMID
- 32007883
- Organisation Unit
- School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 99450832902621
- Output Type
- Journal article
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