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- W4387579298 abstract "ABSTRACTPhosphorous fixation in the soil is the most limiting factor for P-management, and previous studies have indicated that coupling nanoparticulated P sources (e.g. hydroxyapatite) in adequate matrices (nanocomposites) can increase nutrient uptake. However, how the nanocomposite affects the P fixation is still an open question. Herein we describe X-ray absorption near edge structure (XANES) experiments to investigate the role of phosphate fertilizer (P) composite in reducing P complexation in soil. Experiments in a greenhouse (maize cultivation) and soil incubation comparatively revealed that a composite formed by the dispersion of hydroxyapatite (phosphate source) into urea could increase the production of dry matter (compared to monoammonium phosphate, MAP), keeping the residual P available in the soil for future cultivations (i.e. not strongly bonded to minerals). This behavior was evidenced by P-XANES, which indicated that the composite induced the bonding of remnant P to more labile organic fractions instead of mineral phases, as seen in MAP cultivation.KEYWORDS: Controlled releasefertilizersP-complexationP-speciation AcknowledgementsThis work was supported by FAPESP (São Paulo State Research Foundation, grants #2013/11821-5, #2016/09343-6, #2016/10636-8 and #2018/10104-1), CNPq (Brazilian National Council for Scientific and Technological Development, grant #2014/142348-7 and 311463/2017-7), and CAPES (Coordination for the Improvement of Higher Education Personnel, Finance Code 001). XANES measurement facilities were provided by LNLS-Campinas, SP, Brazil (research proposal no. 20160386). The authors thank the Agronano Network (Embrapa Research Network), the Agroenergy Laboratory, and the National Nanotechnology Laboratory for Agribusiness (LNNA) for providing institutional support and facilities.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThe work was supported by the Fundação de Amparo à Pesquisa do Estado de São Paulo [2013/11821-5;2018/10104-1]." @default.
- W4387579298 created "2023-10-13" @default.
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- W4387579298 date "2023-10-12" @default.
- W4387579298 modified "2023-10-14" @default.
- W4387579298 title "Effect of Urea: Hydroxyapatite Composites for Controlled-Release Fertilization to Reduce P Complexation in Soils" @default.
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- W4387579298 doi "https://doi.org/10.1080/00103624.2023.2268645" @default.
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