Sulfur Distribution and Transformations in Everglades Agricultural Area Soil as Influenced by Sulfur Amendment

Ye, Rongzhong; Wright, Alan L.; Orem, William H.; McCray, J. Mabry

doi:10.1097/ss.0b013e3181e16168

Cited by 23 publications

(6 citation statements)

References 31 publications

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“…Management challenges with implementing the CERP 1 mg/L measure, or one similar, are as follows: (1) The Everglades is underlain by ground water that is higher in sulfate [20–58 mg/L (Bates et al 2002 )] and surrounded by seawater [~2,700 mg/L (28.93 mM) (Pilson 1998 )] that can interact with the fresh water Everglades through atmospheric deposition, seepage, tidal effects, and surface water-groundwater interaction; (2) The Everglades receives continuous drainage from Everglades Agricultural Area (EAA) soils that contain sulfur from legacy applications and natural processes (Schueneman 2001 ; Ye et al 2010 ; Orem et al 2011 ) and drainage from STAs that contain sediments which at times and locations have high-oxidized sulfur levels; and (3) Approximately 25 % of the water entering the Everglades originates from Lake Okeechobee (30–40 mg/L surface water sulfate) by way of canal delivery (James and McCormick 2012 ). Despite the surrounding influence of groundwater and atmospheric deposition, current evidence shows neither are major sulfur sources to the Everglades system (Orem et al 2011 ; James and McCormick 2012 ), at least currently.…”

Section: Resultsmentioning

confidence: 99%

Fish Mercury and Surface Water Sulfate Relationships in the Everglades Protection Area

Gabriel

Howard

Osborne

2014

Environmental Management

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Few published studies present data on relationships between fish mercury and surface or pore water sulfate concentrations, particularly on an ecosystem-wide basis. Resource managers can use these relationships to identify the sulfate conditions that contain fish with health-concerning total mercury (THg) levels and to evaluate the role of sulfate in methyl-mercury (MeHg) production. In this study, we derived relationships between THg in three fish trophic levels (mosquitofish, sunfish, and age-1 largemouth bass) and surface water sulfate from 1998 to 2009 for multiple stations across the Everglades Protection Area (EPA). Results show the relationship between sulfate and fish THg in each fish type is nonlinear and largely skewed, similar to the relationship between MeHg production and sulfate concentration in peatland sediment pore water identified by other researchers. Peak fish THg levels occurred in ~1 to 12 mg/L sulfate conditions. There was significant variability in the fish THg data, and there were several instances of high-fish THg levels in high-sulfate conditions (>30 mg/L). Health-concerning fish THg levels were present in all surface water sulfate conditions; however, most of these levels occurred in 1–20 mg/L sulfate. The data in this study, including recent studies, show consistent and identifiable areas of high- and low-fish THg across the spectrum of surface water sulfate concentration, therefore, applying an ecosystem-wide sulfur strategy may be an effective management approach as it would significantly reduce MeHg risk in the EPA.

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Section: Resultsmentioning

confidence: 99%

Fish Mercury and Surface Water Sulfate Relationships in the Everglades Protection Area

Gabriel

Howard

Osborne

2014

Environmental Management

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“…In the EAA, sulfur (S) has a long history of being used as soil amendments, fertilizers, and fungicides (Orem et al, ). Large‐scale S application increased the SO 4 2− concentration in the EAA soils, with the soil extractable SO 4 2− concentrations of 376, 129, and 21 mg SO 4 2— S kg −1 at 2, 6, and 9 months after S application (Ye et al, ). Methane emission has been found under suppression with SO 4 2− addition higher than 15 mg SO 4 2 –S kg −1 (Ro et al, ).…”

Section: Discussionmentioning

confidence: 99%

Greenhouse Gas Emissions Under Different Drainage and Flooding Regimes of Cultivated Peatlands

VanZomeren

Inglett

et al. 2017

JGR Biogeosciences

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Globally, approximately 10–20% of peatlands have been drained for agricultural purposes. A strategy to protect peatlands and mitigate carbon dioxide (CO2) emissions, while continuing agricultural production, is the use of intermittent flooding and drainage. A potential drawback of this strategy could be increases in methane (CH4) and nitrous oxide (N2O) emissions. The objective of this study was to compare greenhouse gas (GHG) emissions from peatlands under various flooding–drainage cycles. A laboratory study was performed using intact soil cores subjected to different durations of flooding and drainage for 6 months. Average daily emissions of CO2 and N2O were significantly higher (P < 0.001) under drained (667 ± 37 mg CO2–C m−2 d−1 and 135 ± 19 μg N2O–N m−2 d−1) than flooded conditions (86 ± 6 mg CO2–C m−2 d−1 and 48 ± 2 μg N2O–N m−2 d−1). Methane emissions were not influenced by drained/flooded conditions, with an average rate of 116 ± 11 μg CH4–C m−2 d−1. Peaks of CH4 and N2O emissions were observed after flooding events and lasted less than 24 h. The peak emissions were approximately 8 and 19 times higher than the mean CH4 and N2O emissions, respectively. Carbon dioxide was the dominant component of GHGs, irrespective of hydrologic regime, accounting for more than 92% of overall global warming potential. Global warming potential was inversely proportional to the flooding period, indicating that prolonging the flooding period of peatlands would help mitigate soil oxidation and GHG emissions and enhance sustainability of these agricultural peatlands.

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“…However, most researchers reported a much higher value (>90%) of organic S in soils. This happened because they computed the value of organic S indirectly by deducting the available S from the total S (Wang et al, 2006;Ye et al, 2010) thereby including nonsulphate S with the organic pool. On the other hand, those who separately estimated organic S and nonsulphate S, obtained results similar to ours (Ghodke et al, 2016;Rai & Singh, 2018).…”

Section: Sulphur In Soilsmentioning

confidence: 99%

Sulphur flow in soil–plant system with long‐term agricultural practices on a Vertisol

Ghosh

Murmu

Adhikary

et al. 2022

European J Soil Science

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Sulphur (S) deficiency is widespread in agricultural fields across the globe. Its flow in the soil–plant system under different management practices is too poorly understood to strategize S fertilisation with increased efficiency. Accordingly, an attempt was made to elucidate the pathways of S flow in soils and to plants under organic, inorganic, and integrated nitrogen (N) management practices using a 30‐year‐old long‐term field experiment planted with sorghum in the semi‐arid tropics. Partitioning soil S into pools, we observed that exchangeable (4.2%) and adsorbed (4.6%) pools constituted a small part of total soil S but contributed mainly to S nutrition (46% and 33%) of sorghum; it also contributed to the variability of S extractable by six commonly used extractants. Using multiple criteria, the superiority of monocalcium phosphate as an extractant for assessment of S in Vertisols was established. Among the N management practices, integrated N management performed better in supplying S in soils and to sorghum, and excelled, both in retention (35.9% of applied) and utilisation (13%) of S, curbing its losses (51.1%) from the system, over the organics (26%, 8.4%, and 65.6%, respectively) and inorganic (11.6%, 7.1%, and 81.3%, respectively) management practices. The integrated management practices with farmyard manure (FYM) excelled in improving S in soils, including economics. Out of the organics, FYM was more effective in improving S availability in soils and its nutrition of the crop over the crop residue, and green manure. Changes in organic C, and oxides and hydroxides of Fe and Al in soils are the keys governing the flows of S in the soil–plant system. A detailed pathway of the increased efficacy of S fertilisation upon conjoint application of N sources over the others was highlighted for adoption in Vertisols of semi‐arid tropics. Highlights Inter‐relationship between pools and extractants of S were elucidated. Organic C and sesquioxides played a key role in S transformation in soils. Monocalcium phosphate was the most sensitive extractant for S in soils. Sixty two percent of the applied S was lost, 28% retained and 10% utilised.

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Sulfur Distribution and Transformations in Everglades Agricultural Area Soil as Influenced by Sulfur Amendment

Cited by 23 publications

References 31 publications

Fish Mercury and Surface Water Sulfate Relationships in the Everglades Protection Area

Fish Mercury and Surface Water Sulfate Relationships in the Everglades Protection Area

Greenhouse Gas Emissions Under Different Drainage and Flooding Regimes of Cultivated Peatlands

Sulphur flow in soil–plant system with long‐term agricultural practices on a Vertisol

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