Spatial distribution of phosphorus fractions in sediment and the potential mobility of phosphorus in Dianchi Lake

Li, Lingping; Liu, Lei; Wang, Shengrui; Liu, Wenbin; Jiao, Lixin; Yang, Yang; Yang, Rui

doi:10.1007/s12665-015-4151-y

Cited by 19 publications

(10 citation statements)

References 34 publications

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“…Li et al . () reported greater calcium‐bound Pi in the sediment of the south of Dian Lake than that in other parts of the lake.…”

Section: Discussionmentioning

confidence: 94%

Soil phosphorus fractions in aggregate size classes in southwestern China

Zhang

2018

Soil Use and Management

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The build‐up of topsoil phosphorus (P) through excess fertilizer application can increase P losses in run‐off leading to negative impacts on aquatic ecosystems. To better understand the risk of P losses, the fractions of soil P in four aggregate size classes were quantified for two vegetable production sites (<10 and >25 yrs) and a conservation buffer site (8 yrs) in southwestern China. Sequential extraction methods of inorganic P (Pi) and organic P (Po) were carried out on samples from Nitisol and Gleysol soils from 0 to 5 cm and 5 to 10 cm depths. On average, soil Pi concentrations exceeded Po concentrations threefold, primarily in the bioavailable Pi fractions (labile Pi, loosely bound Pi and non‐occluded Pi). Soil Po fractions and bioavailable Pi fractions were significantly greater under the >25 yrs field than in the <10 yrs field. The conversion of fields under vegetable production to forested buffer substantially decreased the levels of the bioavailable Pi and labile Po in the Gleysol after 8 yrs. Soil macro‐aggregates (>0.25 mm) had greater concentrations of bioavailable Pi fractions and of labile and moderately labile Po than did micro‐aggregates and silt and clay size components. Although more P was stored in recalcitrant P forms, a larger percentage of all P fractions was found in macro‐aggregates in these soils. Small active P‐enriched aggregates potentially intensify export of P from the vegetable soils by run‐off, and therefore, management practices must be optimized to enhance agricultural P efficiencies.

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“…Li et al . () reported greater calcium‐bound Pi in the sediment of the south of Dian Lake than that in other parts of the lake.…”

Section: Discussionmentioning

confidence: 94%

Soil phosphorus fractions in aggregate size classes in southwestern China

Zhang

2018

Soil Use and Management

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“…However, this fraction is susceptible to low pH. In other words, it may release under weakly acidic condition [31,32]. In contrast, Water-P is available because it is labile easily release to the pore water [14,33].…”

Section: Phosphorus Fractionmentioning

confidence: 99%

Adsorption of Phosphorus Infiltrating Andosol in Aso Caldera, Kumamoto

Yumioka

Hama

Kitamura

et al. 2020

J. of Wat. & Envir. Tech.

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High concentration (more than 1.0 mgP/L) of phosphorus was detected in groundwater in Aso caldera, Kumamoto. The fact indicates phosphorus can be transported by groundwater flows. The objective of this study is to clarify the characteristics of paddy soil (Andosol) in phosphorus adsorption process. Adsorption capacity of the Andosol was evaluated by continuously-flowing system using the soil column. In addition, soil phosphorus was categorized into five fractions; water-extractable phosphorus (Water-P), phosphorus extracted by sodium bicarbonate and sodium dithionate (DB-P), phosphorus extracted by sodium hydroxide (NaOH-P), phosphorus extracted by hydrochloric acid (HCl-P) and residual phosphorus (Res-P). As a result, it is confirmed that the flow rate of water is an important factor to control the phosphorus adsorption by the Andosol. The lower the flow rate is, the more phosphorus is adsorbed on the upstream soil. On the other hand, when the flow rate was high, phosphorus was evenly distributed in column soil. In addition, the fraction of NaOH-P accounted for 52% of the adsorbed phosphorus, suggesting that NaOH-P is the most important fraction which controls phosphorus adsorption to Andosol.

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“…Most of the GPES and vegetation in this region are located in the mountainous area around the Dianchi and Fuxian Lakes (Li et al 2015) (Fig. 1).…”

Section: Study Areamentioning

confidence: 99%

Leaf nitrogen and phosphorus stoichiometry of plant communities in geochemically phosphorus-enriched soils in a subtropical mountainous region, SW China

Yan

Duan

et al. 2015

Environ Earth Sci

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Leaf nitrogen (N) and phosphorus (P) stoichiometry might reflect the biogeochemical features of ecosystems, yet the potential range of stoichiometric flexibility under geochemically P-enriched soils (GPES) is still unclear. Leaf N and P of 126 plant species in 70 vegetation plots in GPES were investigated in central Yunnan, southwestern China, and leaf P fractions (i.e., inorganic vs. organic P) of the dominant species were examined. Our objectives were to improve the understanding of the role of soil N and P variability in controlling leaf N and P stoichiometry of plant communities in GPES. We found that plants in GPES had higher mean leaf P (4.07 mg/g) and lower N:P ratios (4.94) than average plant values that have been recorded in other parts of the world so far. Some fastgrowing plants had extremely high leaf P ([10 mg/g).Community leaf N and P contents increased as soil N availability increased, but soil N variability was unrelated to community leaf N:P. Instead, community leaf P and N:P ratios were primarily determined by soil P; as soil P availability increased, leaf P increased and leaf N:P significantly decreased. Greater accumulation of inorganic P relative to organic P in leaf was the direct driving factor for community leaf P and N:P ratio patterns in GPES. Although soil P availability was the main controlling factor of leaf N:P patterns, community composition could be manipulated to restore the balance of N and P stoichiometry based on the different responses across species and plant types.

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Spatial distribution of phosphorus fractions in sediment and the potential mobility of phosphorus in Dianchi Lake

Cited by 19 publications

References 34 publications

Soil phosphorus fractions in aggregate size classes in southwestern China

Soil phosphorus fractions in aggregate size classes in southwestern China

Adsorption of Phosphorus Infiltrating Andosol in Aso Caldera, Kumamoto

Leaf nitrogen and phosphorus stoichiometry of plant communities in geochemically phosphorus-enriched soils in a subtropical mountainous region, SW China

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