@article{Liu-Elliott-2021-Phosphorus-runoff,
title = "Phosphorus runoff from Canadian agricultural land: A cross-region synthesis of edge-of-field results",
author = "Liu, Jian and
Elliott, Jane A. and
Wilson, Henry F. and
Macrae, Merrin L. and
Baulch, Helen M. and
Lobb, David A. and
Liu, Jian and
Elliott, Jane A. and
Wilson, Henry F. and
Macrae, Merrin L. and
Baulch, Helen M. and
Lobb, David A.",
journal = "Agricultural Water Management, Volume 255",
volume = "255",
year = "2021",
publisher = "Elsevier BV",
url = "https://gwf-uwaterloo.github.io/gwf-publications/G21-4001",
doi = "10.1016/j.agwat.2021.107030",
pages = "107030",
abstract = "Algal blooms fueled by phosphorus (P) enrichment are threatening surface water quality around the world. Although P loss from arable land is a critical contributor to P loads in many agricultural watersheds , there has been a lack of understanding of P loss patterns and drivers across regions. Here, we synthesized edge-of-field P and sediment runoff data for 30 arable fields in the Canadian provinces of Saskatchewan, Manitoba and Ontario (a total of 216 site-years) to elucidate spatial and temporal differences in runoff and P mobilization in snowmelt and rainfall runoff, and discuss climatic, soil and management drivers for these patterns. Across all regions, precipitation inputs were positively correlated with runoff amounts and consequently P loads. Runoff and P losses were dominated by snowmelt across all sites, however, regional differences in runoff amounts, and P concentrations, loads and speciation were apparent. Proportions of total P in the dissolved form were greater in the prairie region (55{--}94{\%} in Manitoba) than in the Great Lakes region (26{--}35{\%} in Ontario). In Manitoba, dissolved P concentrations in both snowmelt and rainfall runoff were strongly positively correlated to soil Olsen P concentrations in the 0{--}5 cm soil depth; however, this relationship was not found for Ontario fields, where tile drainage dominated hydrologic losses. Although precipitation amounts and runoff volumes were greater in Ontario than Manitoba, some of the greatest P loads were observed from Manitoba fields, driven by management practices. This synthesis highlights the differences across the Canadian agricultural regions in P runoff patterns and drivers, and suggests the need of co-ordinated and standardized monitoring programs to better understand regional differences and inform management. Phosphorus runoff patterns vary with climatic regions across Canada. {\dag}The dissolved P was measured as total dissolved P in MB and dissolved reactive P in SK and ON. {\ddag}Total P was not measured in SK. {\mbox{$\bullet$}} Phosphorus runoff patterns and drivers vary with climatic regions across Canada. {\mbox{$\bullet$}} Co-ordinated and standardized monitoring programs are key to clarify regional differences. {\mbox{$\bullet$}} Snowmelt dominates runoff volume and phosphorus loss across Canada. {\mbox{$\bullet$}} The predominant form of P in runoff differs between the Prairie region and the Great Lakes region. {\mbox{$\bullet$}} Reducing phosphorus sources is important for mitigating phosphorus runoff.",
}
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<abstract>Algal blooms fueled by phosphorus (P) enrichment are threatening surface water quality around the world. Although P loss from arable land is a critical contributor to P loads in many agricultural watersheds , there has been a lack of understanding of P loss patterns and drivers across regions. Here, we synthesized edge-of-field P and sediment runoff data for 30 arable fields in the Canadian provinces of Saskatchewan, Manitoba and Ontario (a total of 216 site-years) to elucidate spatial and temporal differences in runoff and P mobilization in snowmelt and rainfall runoff, and discuss climatic, soil and management drivers for these patterns. Across all regions, precipitation inputs were positively correlated with runoff amounts and consequently P loads. Runoff and P losses were dominated by snowmelt across all sites, however, regional differences in runoff amounts, and P concentrations, loads and speciation were apparent. Proportions of total P in the dissolved form were greater in the prairie region (55–94% in Manitoba) than in the Great Lakes region (26–35% in Ontario). In Manitoba, dissolved P concentrations in both snowmelt and rainfall runoff were strongly positively correlated to soil Olsen P concentrations in the 0–5 cm soil depth; however, this relationship was not found for Ontario fields, where tile drainage dominated hydrologic losses. Although precipitation amounts and runoff volumes were greater in Ontario than Manitoba, some of the greatest P loads were observed from Manitoba fields, driven by management practices. This synthesis highlights the differences across the Canadian agricultural regions in P runoff patterns and drivers, and suggests the need of co-ordinated and standardized monitoring programs to better understand regional differences and inform management. Phosphorus runoff patterns vary with climatic regions across Canada. \dagThe dissolved P was measured as total dissolved P in MB and dissolved reactive P in SK and ON. \ddagTotal P was not measured in SK. \bullet Phosphorus runoff patterns and drivers vary with climatic regions across Canada. \bullet Co-ordinated and standardized monitoring programs are key to clarify regional differences. \bullet Snowmelt dominates runoff volume and phosphorus loss across Canada. \bullet The predominant form of P in runoff differs between the Prairie region and the Great Lakes region. \bullet Reducing phosphorus sources is important for mitigating phosphorus runoff.</abstract>
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%0 Journal Article
%T Phosphorus runoff from Canadian agricultural land: A cross-region synthesis of edge-of-field results
%A Liu, Jian
%A Elliott, Jane A.
%A Wilson, Henry F.
%A Macrae, Merrin L.
%A Baulch, Helen M.
%A Lobb, David A.
%J Agricultural Water Management, Volume 255
%D 2021
%V 255
%I Elsevier BV
%F Liu-Elliott-2021-Phosphorus-runoff
%X Algal blooms fueled by phosphorus (P) enrichment are threatening surface water quality around the world. Although P loss from arable land is a critical contributor to P loads in many agricultural watersheds , there has been a lack of understanding of P loss patterns and drivers across regions. Here, we synthesized edge-of-field P and sediment runoff data for 30 arable fields in the Canadian provinces of Saskatchewan, Manitoba and Ontario (a total of 216 site-years) to elucidate spatial and temporal differences in runoff and P mobilization in snowmelt and rainfall runoff, and discuss climatic, soil and management drivers for these patterns. Across all regions, precipitation inputs were positively correlated with runoff amounts and consequently P loads. Runoff and P losses were dominated by snowmelt across all sites, however, regional differences in runoff amounts, and P concentrations, loads and speciation were apparent. Proportions of total P in the dissolved form were greater in the prairie region (55–94% in Manitoba) than in the Great Lakes region (26–35% in Ontario). In Manitoba, dissolved P concentrations in both snowmelt and rainfall runoff were strongly positively correlated to soil Olsen P concentrations in the 0–5 cm soil depth; however, this relationship was not found for Ontario fields, where tile drainage dominated hydrologic losses. Although precipitation amounts and runoff volumes were greater in Ontario than Manitoba, some of the greatest P loads were observed from Manitoba fields, driven by management practices. This synthesis highlights the differences across the Canadian agricultural regions in P runoff patterns and drivers, and suggests the need of co-ordinated and standardized monitoring programs to better understand regional differences and inform management. Phosphorus runoff patterns vary with climatic regions across Canada. \dagThe dissolved P was measured as total dissolved P in MB and dissolved reactive P in SK and ON. \ddagTotal P was not measured in SK. \bullet Phosphorus runoff patterns and drivers vary with climatic regions across Canada. \bullet Co-ordinated and standardized monitoring programs are key to clarify regional differences. \bullet Snowmelt dominates runoff volume and phosphorus loss across Canada. \bullet The predominant form of P in runoff differs between the Prairie region and the Great Lakes region. \bullet Reducing phosphorus sources is important for mitigating phosphorus runoff.
%R 10.1016/j.agwat.2021.107030
%U https://gwf-uwaterloo.github.io/gwf-publications/G21-4001
%U https://doi.org/10.1016/j.agwat.2021.107030
%P 107030
Markdown (Informal)
[Phosphorus runoff from Canadian agricultural land: A cross-region synthesis of edge-of-field results](https://gwf-uwaterloo.github.io/gwf-publications/G21-4001) (Liu et al., GWF 2021)
ACL
- Jian Liu, Jane A. Elliott, Henry F. Wilson, Merrin L. Macrae, Helen M. Baulch, David A. Lobb, Jian Liu, Jane A. Elliott, Henry F. Wilson, Merrin L. Macrae, Helen M. Baulch, and David A. Lobb. 2021. Phosphorus runoff from Canadian agricultural land: A cross-region synthesis of edge-of-field results. Agricultural Water Management, Volume 255, 255:107030.
