Evaluating fall application of soil amendments to mitigate phosphorus losses during spring snowmelt

Lasisi, Ahmed; Kumaragamage, Darshani; Casson, Nora J.; Amarakoon, Inoka; Indraratne, S. P.; Wilson, Henry F.; Goltz, Douglas M.

doi:10.1016/j.catena.2022.106908

Cited by 5 publications

(11 citation statements)

References 53 publications

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“…A recent field study conducted under Canadian prairie field conditions reported a decrease in dissolved reactive phosphorus (DRP) loads in snowmelt runoff with fall application of alum, gypsum, or Epsom salt to field plots. The decrease in snowmelt DRP load in this study was <20% and not statistically significant in an unmanured site, but >42% in a manured site with differences being significant only with Epsom salt amendment (Lasisi, Kumaragamage, et al., 2023). More information on P forms and speciation changes is needed to better understand the mechanisms responsible for the reduction in P loss to snowmelt with fall‐amended soils.…”

Section: Introductioncontrasting

confidence: 59%

“…In brief, the mean snowmelt DRP concentrations across sampling days were 0.73 ± 0.31, 0.61 ± 0.17, 0.57 ± 0.22, and 0.51 ± 0.24 mg L −1 in unamended, alum‐amended, gypsum‐amended, and Epsom salt‐amended plots, respectively. The snowmelt DRP concentrations and loads (calculated as the product of DRP concentration and snowmelt volume) in alum‐, gypsum‐, and Epsom salt‐amended soils were less than in unamended soils; however, the differences were significant only for DRP load in the Epsom‐salt amended plot (Lasisi, Kumaragamage, et al., 2023), with a 62% lower cumulative DRP load than that of control treatment. The cumulative snowmelt DRP load from alum and gypsum‐amended treatments was 51% and 48% lower, respectively, than the control treatment, even though not statistically significant.…”

Section: Resultsmentioning

confidence: 98%

“…The daily DRP concentrations in snowmelt, snowmelt volume, and daily and cumulative DRP loads in unamended and amended plots are presented elsewhere (Lasisi, Kumaragamage, et al., 2023). In brief, the mean snowmelt DRP concentrations across sampling days were 0.73 ± 0.31, 0.61 ± 0.17, 0.57 ± 0.22, and 0.51 ± 0.24 mg L −1 in unamended, alum‐amended, gypsum‐amended, and Epsom salt‐amended plots, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The field has a history of manure application and received liquid swine manure in October 2020. More details on field site and soil properties are given elsewhere (Lasisi, Kumaragamage, et al., 2023).…”

Section: Methodsmentioning

confidence: 99%

“…More details of the snowmelt collection and analysis are given in Lasisi, Kumaragamage, et al. (2023).…”

Section: Methodsmentioning

confidence: 99%

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Phosphorus fractions and speciation in an alkaline, manured soil amended with alum, gypsum, and Epsom salt

Kumaragamage,

Hettiarachchi,

Amarakoon

et al. 2024

J of Env Quality

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Snowmelt runoff is a dominant pathway of phosphorus (P) losses from agricultural lands in cold climatic regions. Soil amendments effectively reduce P losses from soils by converting P to less soluble forms; however, changes in P speciation in cold climatic regions with fall‐applied amendments have not been investigated. This study evaluated P composition in soils from a manured field with fall‐amended alum (Al2(SO4)3·18H2O), gypsum (CaSO4·2H2O), or Epsom salt (MgSO4·7H2O) using three complementary methods: sequential P fractionation, scanning electron microscopy with energy‐dispersive X‐rays (SEM‐EDX) spectroscopy, and P K‐edge X‐ray absorption near‐edge structure spectroscopy (XANES). Plots were established in an annual crop field in southern Manitoba, Canada, with unamended and amended (2.5 Mg ha−1) treatments having four replicates in 2020 fall. Soil samples (0–10 cm) taken from each plot soon after spring snowmelt in 2021 were subjected to P fractionation. A composite soil sample for each treatment was analyzed using SEM‐EDX and XANES. Alum‐ and Epsom salt‐treated soils had significantly greater residual P fraction with a higher proportion of apatite‐like P and a correspondingly lower proportion of P sorbed to calcite (CaCO3) than unamended and gypsum‐amended soils. Backscattered electron imaging of SEM‐EDX revealed that alum‐ and Epsom salt‐amended treatments had P‐enriched microsites frequently associated with aluminum (Al), iron (Fe), magnesium (Mg), and calcium (Ca), which was not observed in other treatments. Induced precipitation of apatite‐like species may have been responsible for reduced P loss to snowmelt previously reported with fall application of amendments.

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Section: Introductioncontrasting

confidence: 59%

Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…More details of the snowmelt collection and analysis are given in Lasisi, Kumaragamage, et al. (2023).…”

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Phosphorus fractions and speciation in an alkaline, manured soil amended with alum, gypsum, and Epsom salt

Kumaragamage,

Hettiarachchi,

Amarakoon

et al. 2024

J of Env Quality

Self Cite

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Release of phosphorus and metal(loid)s from manured soils to floodwater during a laboratory simulation of snowmelt flooding

Weerasinghe,

Amarakoon,

Kumaragamage

et al. 2024

J of Env Quality

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Phosphorus (P) and metal accumulation in manured agricultural soils and subsequent losses to waterways have been extensively studied; however, the magnitudes and the factors governing their losses during spring snowmelt flooding are less known. We examined the P and metal release from long‐term manured soil to floodwater under simulated snowmelt flooding with recent manure additions. Intact soil columns collected from field plots located in Randolph, Southern Manitoba, 2 weeks after liquid swine manure treatments (surface‐applied, injected, or control with no recent manure addition) were flooded and incubated for 8 weeks at 4 ± 1°C to simulate snowmelt conditions. Floodwater (syringe filtered through 0.45 µm) and soil porewater (extracted using Rhizon‐Mom samplers) samples were periodically extracted and analyzed for dissolved reactive phosphorus (DRP), pH, zinc (Zn), manganese (Mn), iron (Fe), magnesium (Mg), calcium (Ca), and arsenic (As). Mean floodwater DRP concentrations (mg L−1) for manure injected (2.0 ± 0.26), surface‐applied (2.6 ± 0.26), and control (2.2 ± 0.26) treatments did not differ significantly. Despite manure application, DRP loss to floodwater did not significantly increase compared to the control, possibly due to the elevated residual soil P at this site from the long‐term manure use. At the end of simulated flooding, the DRP concentrations increased by 1.5‐fold and 5‐fold in porewater and floodwater, respectively. Metal(loid) concentrations were not affected by manure treatments in general, except for Zn and Mg on certain days. Unlike DRP, where porewater and floodwater concentrations increased with time, metalloid concentration in porewater and floodwater did not show consistent trends with flooding time.

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Residual benefits of alum, gypsum, and magnesium sulfate amendments in reducing phosphorus losses to snowmelt runoff

Perry,

Kumaragamage,

Goltz

et al. 2024

CATENA

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Evaluating fall application of soil amendments to mitigate phosphorus losses during spring snowmelt

Cited by 5 publications

References 53 publications

Phosphorus fractions and speciation in an alkaline, manured soil amended with alum, gypsum, and Epsom salt

Phosphorus fractions and speciation in an alkaline, manured soil amended with alum, gypsum, and Epsom salt

Release of phosphorus and metal(loid)s from manured soils to floodwater during a laboratory simulation of snowmelt flooding

Residual benefits of alum, gypsum, and magnesium sulfate amendments in reducing phosphorus losses to snowmelt runoff

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