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- W4308741409 abstract "Phosphorus (P) is a key limiting nutrient for crops. Oscillation of redox conditions usually induces formation of Fe-enriched cutans in the plow layer of paddy soils. This study investigated P biogeochemistry in the cutans, which were collected from high-yield paddy soils in Taihu Lake region, China. Mössbauer spectroscopy showed that the content of Fe3+ was eight times higher than Fe2+ in the cutans. Based on the evidences from XRD and wet chemical analysis, the enriched Fe in the cutans mostly existed as amorphous oxides, which owned high surface areas for P sorption. In addition, the cutans were composed of spherical particles with diameters of 20–130 μm under microscopy. Moreover , the particles showed evident “trench” structures on their top surface under SEM imaging. These features caused the cutans to retain three times higher P than that in the matrix soils. Furthermore, the cutans demonstrated both high microbial richness and community diversity, in contrast to the matrix soils. In particular, the abundance of phosphate-solubilizing fungi (with relatively highly competitive saprophytic ability) was also significantly promoted. Therefore, the cutans could be considered as hotspots of P accumulation in paddy soils. The subsequent enhancement of the available P would promote rice production." @default.
- W4308741409 created "2022-11-15" @default.
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- W4308741409 date "2023-01-01" @default.
- W4308741409 modified "2023-09-28" @default.
- W4308741409 title "The high accumulation of phosphorus in high-yield paddy soils: A new insight from cutans" @default.
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- W4308741409 doi "https://doi.org/10.1016/j.geoderma.2022.116249" @default.
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