Release and transformation of phosphorus in sediment following seasonal freezing-thawing cycles

Zhang, Zeyu; Jiang, Lai; Chen, Min; Li, Jia; Zhang, Linglei; Zhang, Jing; Liao, Ning

doi:10.1016/j.jconhyd.2022.103978

Cited by 6 publications

(2 citation statements)

References 30 publications

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“…However, its direct influence was negative, whereas the indirect influence through labile Po or labile Pi was positive (β = 0.31 × 0.31 + 0.11 × 0.31 = 0.13). The direct negative influence was due to organisms taking up phosphate from the soil solution and forming organic states in combination with amorphous and crystalline Fe/Al [48]. As soluble Pi became depleted, it was quickly replenished with labile P, which can be further replenished by moderately labile Po through mineralization or solid-phase P diffusion [49].…”

Section: Quantifying the Pathways Of Soil P Transformationsmentioning

confidence: 99%

Structural Equation Modeling of Phosphorus Transformations in Soils of Larix principis-rupprechtii Mayr. Plantations

Tian,

Li,

Song

et al. 2023

Forests

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Understanding the soil phosphorus (P) cycle is a prerequisite for the sustainable management of land resources. The sequential-extraction method was used to determine P fractions in 513 soils of Larix principis-rupprechtii Mayr. plantations. With these data, this study applied structural equation modeling to evaluate the interaction between various soil P fractions. Quantitative analysis was conducted on the importance of different soil P pools and P transformation pathways on soil P availability in a larch plantation. Our study showed that soluble inorganic P (Pi) was directly positively affected by labile Pi, labile organic P (Po), secondary mineral P, and primary mineral P, and was directly negatively affected by moderately labile Po. Soluble Pi was not directly affected by occluded P. The primary mineral P (β = 0.40) had the greatest total impact on soluble Pi, followed by secondary mineral P (β = 0.32) and labile P (labile Pi and Po, β = 0.31), and then occluded P (β = 0.11), with the total impact of moderately labile Po being relatively small (β = −0.06). In summary, this study reveals the important roles of soluble Pi in P transformations and in determining overall P availability in soils, as well as the extensive effects of weathering on soil P dynamics in L. principis-rupprechtii plantations.

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Section: Quantifying the Pathways Of Soil P Transformationsmentioning

confidence: 99%

Structural Equation Modeling of Phosphorus Transformations in Soils of Larix principis-rupprechtii Mayr. Plantations

Tian,

Li,

Song

et al. 2023

Forests

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“…Similarly, Fe, Al and P were always more enriched at the sites that could be sampled during the flood, which most likely skewed the average to higher values on that sampling date. It is likely that more consistently saturated conditions and exposure to river flows through multiple flow paths caused the chemical reduction of FeIII and the consequent release of Al and P that were associated with the Fe oxides (Darke and Walbridge, 2000;Forsmann and Kjaergaard, 2014;Khan et al, 2022;Zhang et al, 2022).…”

Section: Soil Phosphorus Pools During the Spring To Summer Transitionmentioning

confidence: 99%

Shifts in soil phosphorus fractions during seasonal transitions in a riparian floodplain wetland

Coppolino

Munford

Macrae

et al. 2022

Front. Environ. Sci.

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Losses of phosphorus from soil to surface waters in agricultural areas have been linked to substantial declines in water quality. Riparian wetlands can potentially intercept phosphorus mobilized from upland soils before it reaches connecting waterways, but the capacity of wetlands to buffer against downstream losses of P is poorly understood, especially in northern temperate zones. In these regions, the spring freshet releases large volumes of water from snowmelt and soil pore water during the time when microbial productivity, which transfers available P into biomass, is low. In addition, losses of P in runoff may be exacerbated by freeze-thaw cycling (FTC) in soil during late winter and early spring through the physical degradation of organic matter. We investigated P dynamics from late fall through spring thaw and into summer to assess P transfers between inorganic, organic and microbial biomass pools, as functions of season and distance from a river. The site is located on the Grand River in southern Ontario, which discharges to Lake Erie, and consists of riparian wetland and wooded areas. Reactive P (Olsen P) and microbial biomass P (PMBIO) increased with distance from the river and varied more over time in the wetland soil compared to the adjacent wooded area, reflecting higher variability in vegetation, topography and hydrology. The positive correlation between microbial biomass P and microbes linked to ammonification supports the release of N and P through mineralization pathways as spring progresses, with microbial biomass decreasing in June as plant growth increases. There was evidence for leaching of Fe and Al, and lower concentrations of total P, in the transect proximate to the river. Seasonal flooding during spring thaw contributed to a pulse of dissolved reactive P, but temperature monitoring showed that the wetland soil did not experience freeze-thaw cycling. Investigation of FTC using wetland soil in mesocosms indicated that multiple FTC (>3) were necessary to increase the pool of reactive soil P, with the highest amount of soil reactive P observed after six FTC, when dissolved reactive P also tended to increase.

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Advances and hotspots of phosphorus form analysis of sediments based on different extraction methods using CiteSpace

Tang¹,

Bai²,

Zhang³

et al. 2023

Ecohydrology & Hydrobiology

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Release and transformation of phosphorus in sediment following seasonal freezing-thawing cycles

Cited by 6 publications

References 30 publications

Structural Equation Modeling of Phosphorus Transformations in Soils of Larix principis-rupprechtii Mayr. Plantations

Structural Equation Modeling of Phosphorus Transformations in Soils of Larix principis-rupprechtii Mayr. Plantations

Shifts in soil phosphorus fractions during seasonal transitions in a riparian floodplain wetland

Advances and hotspots of phosphorus form analysis of sediments based on different extraction methods using CiteSpace

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