Phosphorus interception in floodwater of paddy field during the rice-growing season in TaiHu Lake Basin

Zhang, Zhijian; Zhang, Jianying; He, Ruo; Wang, Zhaode; Zhu, Yiyong

doi:10.1016/j.envpol.2006.05.031

Cited by 48 publications

(31 citation statements)

References 42 publications

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“…The concentration of PP and DP had a tendency to decline over time, especially in the first week after fertilization and the concentration of P coll did not fluctuate much. The main proportion of P in paddy floodwater changed from DP to PP, which was in accordance with the results of previous studies (Zhang et al 2007). At the early stage of fertilization, the DP occupied 60 % of total P under OM treatment and the proportion was less than 80 % under IP 1 and IP 2 treatments.…”

Section: Dynamics Of P Coll In Paddy Floodwater and Runoffsupporting

confidence: 92%

“…Dynamics of P concentration in paddy floodwater was similar to previous reports in this region (Zhang et al 2007). Organic fertilization increased P concentration in floodwater to a higher level than inorganic fertilization, which posed a high risk of P loss potential.…”

Section: Dynamics Of P Coll In Paddy Floodwater and Runoffsupporting

confidence: 86%

“…In a previous study, a limit of total P concentration in paddy drainage (0.25 mg L −1 ) was proposed (Sharpley 1995). Since the concentrations of P in particle, colloidal and dissolved phases were rapidly increased after P fertilization, much importance should be attached to the risk of P loss via paddy runoff in the first week after fertilization and zero-drainage can be a priority to reduce P loss (Zhang et al 2007). In this study, the concentration of total P at late stage in 2013 was 0.12 mg L −1 under different treatments, which was between the II (0.1 mg L −1 ) and III (0.2 mg L −1 ) level of national integrated wastewater discharge standard of China (GB3838-2002).…”

Section: Dynamics Of P Coll In Paddy Floodwater and Runoffmentioning

confidence: 99%

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Release and migration of colloidal phosphorus from a typical agricultural field under long-term phosphorus fertilization in southeastern China

et al. 2015

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Purpose Colloid-facilitated migration of phosphorus (P) is a widely accepted phenomenon in surface and subsurface environment. Release and migration of colloidal P (P coll ) in agricultural fields are closely related to P fertilization regimes. In this study, a site-specific experiment with rice/oilseed rape rotation was conducted to determine the export potential of P coll from the field and literatures reporting the impact of P fertilization regimes on release and migration of P coll in other agricultural fields were compared. Materials and methods In this 2-year field experiment, four P fertilization regimes (no fertilizer control, inorganic P fertilizer of low and high rates, and swine manure treatment) with three replicates were conducted. Floodwater and runoff samples were collected in flooding season and the 100-cm-depth soil samples were collected after both crops' harvest seasons. Colloidal particles were separated by microfiltration and ultracentrifugation processes and determined gravimetrically. The P coll value was calculated as the difference between the concentration of total P in non-ultracentrifuged and ultracentrifuged samples. The same method was applied for the colloidal mineral elements (Fe and Al) and organic carbon.Results and discussion Total P concentration in paddy floodwater significantly increased after fertilization but decreased quickly in the following days, maintaining at 6.0 mg m −2 . In soil extracts, concentration of P coll was low but stable, which ranged from 6 to 22 % of total P after oilseed rape season and from 7 to 18 % after rice season. In runoff samples, there were positive correlations between P coll , colloidal Fe (Fe coll ), colloidal Al (Al coll ), and colloidal TOC (TOC coll ); the majority of P forms was molybdate reactive P. In both crops' seasons, the amount of colloids increased with soil depth. Content of soil P coll was low and occupied 0.1-2 % of total P. The literature review showed that P coll in soil solution, runoff, and leachate ranged from 1.4 to 94 % of total P. Conclusions These results suggested that although the concentrations of P coll were not high, they widely distributed in paddy floodwater, runoff, and soil profile. Fertilization regimes and planting systems had a significant influence on the contents of P coll . Moreover, the P coll binding with Fe/Al minerals and organic carbon might be an alternative route of P loss in paddy field.

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Section: Dynamics Of P Coll In Paddy Floodwater and Runoffsupporting

confidence: 92%

Section: Dynamics Of P Coll In Paddy Floodwater and Runoffsupporting

confidence: 86%

Section: Dynamics Of P Coll In Paddy Floodwater and Runoffmentioning

confidence: 99%

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Release and migration of colloidal phosphorus from a typical agricultural field under long-term phosphorus fertilization in southeastern China

et al. 2015

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“…In a study investigating the export of P from farmlands to the Tai Lake region of China, it was found that the amount of P lost increased with P fertilizer rate, decreased with time after P fertilizer application, and was smaller in soil with better water infiltration than in soil with poor infiltration. The period of greatest risk for P losses from paddy fields was within 1-2 months after P application (Zhang et al 2007). A number of experiments have shown that incorporating fertilizers into the soil minimizes P loss (Withers et al 2005).…”

Section: Effects Of P Fertilizer Application On P Runoff and Eutrophimentioning

confidence: 98%

Agronomic and environmental aspects of phosphate fertilizers varying in source and solubility: an update review

Chien

Prochnow

Tu³

et al. 2010

Nutr Cycl Agroecosyst

241

155

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This review discusses and summarizes the latest reports regarding the agronomic utilization and potential environmental effects of different types of phosphate (P) fertilizers that vary in solubility. The agronomic effectiveness of P fertilizer can be influenced by the following factors: (1) water and citrate solubility; (2) chemical composition of solid watersoluble P (WSP) fertilizers; (3) fluid and solid forms of WSP fertilizers; and (4) chemical reactions of P fertilizers in soils. Non-conventional P fertilizers are compared with WSP fertilizers in terms of P use efficiency in crop production. Non-conventional P fertilizers include directly applied phosphate rock (PR), partially acidulated PR (PAPR), and compacted mixtures of PR and WSP. The potential impacts of the use of P fertilizers from both conventional (fully acidulated) and non-conventional sources are discussed in terms of (1) contamination of soils and plants with toxic heavy metals, such as cadmium (Cd), and (2) the contribution of P runoff to eutrophication. Best practices of integrated nutrient management should be implemented when applying P fertilizers to different cropping systems. The ideal management system will use appropriate sources, application rates, timing, and placement in consideration of soil properties. The goal of P fertilizer use should be to optimize crop production without causing environmental problems.

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“…NaOH+ EDTA-P represents the amounts of organic P in soil in addition to orthophosphate (Cade-Menumand and Preston 1996;Koopmans et al 2007). As to P turnover in the sediment, the ease of biodegradation of organic P by phosphatase would result in the release of phosphate (Sharpley et al 1994;Ahlgren et al 2005;Turner and Newman 2005;Zhang et al 2007). Therefore, the presence of a considerable amount of organic P during the biodegradation bioprocess would break the P equilibrium between the sediment and overlying water under anoxic conditions.…”

Section: P Status Of Sedimentsmentioning

confidence: 98%

Spatial Status and Retention Potential of Phosphorus in Riparian Wetlands of the Southern Taihu Basin, China

Wang

Yao

et al. 2009

Wetlands

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Surface waters in Taihu Basin, China are increasingly threatened by phosphorus (P) related eutrophication. This study investigated the temporal-spatial status of P in sediment-water in riparian wetlands located in the southern region of Taihu Basin. Two sets of laboratory simulation study, 1) static columns and 2) steady-flow flumes representing wetland in both dry and rainy seasons, were carried out to understand the characteristics and mechanisms of P interaction between sediment and overlying water. In wetland sediments, significant increases in total P (TP) and NaHCO 3 (pH=8.5) extractable P (Olsen-P) occurred with the increase of NaOH+EDTA extractable P (NaOH+ EDTA-P). After comparing the P adsorption capacity (Q max ) with TP in the sediment, there could be a risk of P export from the sediment. In the static column experiment, dynamic characteristics of dissolved reactive phosphorus (DRP) in the overlying water can be divided into buffer reaction, rapid adsorption, and slow adsorption. A quasi U-pattern curve was observed in the steady-flow flume experiment, i.e., DRP in the overlying water decreased initially and then increased. Because upstream water with high P concentration flowed over the test wetland during rainy seasons, the ecological role of P interception by the sediment could be weakened.

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Phosphorus interception in floodwater of paddy field during the rice-growing season in TaiHu Lake Basin

Cited by 48 publications

References 42 publications

Release and migration of colloidal phosphorus from a typical agricultural field under long-term phosphorus fertilization in southeastern China

Release and migration of colloidal phosphorus from a typical agricultural field under long-term phosphorus fertilization in southeastern China

Agronomic and environmental aspects of phosphate fertilizers varying in source and solubility: an update review

Spatial Status and Retention Potential of Phosphorus in Riparian Wetlands of the Southern Taihu Basin, China

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