Use this url to cite publication: https://hdl.handle.net/20.500.14172/19961
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Agricultural practices regulate the seasonality of groundwater-river nitrogen exchanges
Type of publication
Straipsnis Web of Science ir Scopus duomenų bazėje / Article in Web of Science and Scopus database (S1)
Type of document
type::text::journal::journal article::research article
Author(s)
Monica Pinardi | National Research Council | IT | ||
Elisa Soana | University of Ferrara | IT | ||
Edoardo Severini | University of Parma | IT | ||
Erica Racchetti | University of Parma | IT | ||
Fulvio Celico | University of Parma | IT | ||
LT | University of Parma | IT |
Title
Agricultural practices regulate the seasonality of groundwater-river nitrogen exchanges
Publisher
Amsterdam : Elsevier
Date Issued
Date Issued | Volume | Issue | Start Page | End Page |
---|---|---|---|---|
2022 | vol. 273 | art. no. 107904 | 1 | 12 |
Is part of
Agricultural water management
Field of Science
Abstract
Soil System Budgets (SSB) of nutrients are generally performed annually over arable land to infer their use efficiency
and water pollution risk in highly exploited agricultural watersheds. They are seldom partitioned into
seasonal budgets and matched with seasonal nutrient transport in adjacent river reaches. We calculated seasonal
soil nitrogen (N) budgets in a Mincio River sub-basin (Italy), and we analyzed the dissolved inorganic N net
export in the river reach draining such sub-basin. Our results show seasonal differences of SSB with N excess in
winter and even more in spring, equilibrium among sources and sinks during autumn and N deficit during
summer. Seasonal inorganic N loads transported by the river were not correlated with SSB as they peaked in late
summer and were at their minimum in early spring. Fertilization uncoupled to significant uptake supports N
excess in winter and spring, whereas crop uptake uncoupled to N inputs supports summer N deficit. Nitrification
cannot explain nitrate accumulation in the river reach, suggesting alternative dynamics driving the local hydrology.
Flood irrigation results in large soil nitrate solubilization, transport and in upward migration of the
groundwater piezometric head during spring and summer periods. River water is likely replaced by nitrate-rich
groundwater when the groundwater recharge exceeds a certain threshold coinciding with late summer. Irrigation
is then interrupted and the piezometric head, together with nitrate exchange, decreases. This work suggests that
a deep understanding of N dynamics in agricultural watersheds with flooding irrigation on permeable soils needs
the reconstruction of the vertical pathways of nitrate and of river-groundwater interactions. Moreover, the
partitioning of annual into seasonal N budgets and their combination with irrigation practices allows the
identification of hot moments in N cycling. Agricultural practices minimizing nitrate excess, its mobility and the
risk of surface and groundwater pollution are suggested for this area.
and water pollution risk in highly exploited agricultural watersheds. They are seldom partitioned into
seasonal budgets and matched with seasonal nutrient transport in adjacent river reaches. We calculated seasonal
soil nitrogen (N) budgets in a Mincio River sub-basin (Italy), and we analyzed the dissolved inorganic N net
export in the river reach draining such sub-basin. Our results show seasonal differences of SSB with N excess in
winter and even more in spring, equilibrium among sources and sinks during autumn and N deficit during
summer. Seasonal inorganic N loads transported by the river were not correlated with SSB as they peaked in late
summer and were at their minimum in early spring. Fertilization uncoupled to significant uptake supports N
excess in winter and spring, whereas crop uptake uncoupled to N inputs supports summer N deficit. Nitrification
cannot explain nitrate accumulation in the river reach, suggesting alternative dynamics driving the local hydrology.
Flood irrigation results in large soil nitrate solubilization, transport and in upward migration of the
groundwater piezometric head during spring and summer periods. River water is likely replaced by nitrate-rich
groundwater when the groundwater recharge exceeds a certain threshold coinciding with late summer. Irrigation
is then interrupted and the piezometric head, together with nitrate exchange, decreases. This work suggests that
a deep understanding of N dynamics in agricultural watersheds with flooding irrigation on permeable soils needs
the reconstruction of the vertical pathways of nitrate and of river-groundwater interactions. Moreover, the
partitioning of annual into seasonal N budgets and their combination with irrigation practices allows the
identification of hot moments in N cycling. Agricultural practices minimizing nitrate excess, its mobility and the
risk of surface and groundwater pollution are suggested for this area.
ISSN (of the container)
0378-3774
1873-2283
WOS
000876856000004
Scopus
2-s2.0-85138442581
Coverage Spatial
Nyderlandai / Netherlands (NL)
Language
Anglų / English (en)
Bibliographic Details
80
Journal | IF | AIF | AIF (min) | AIF (max) | Cat | AV | Year | Quartile |
---|---|---|---|---|---|---|---|---|
Agricultural Water Management | 6.7 | 3.9 | 3.4 | 4.4 | 2 | 1.73 | 2022 | Q1 |
Journal | IF | AIF | AIF (min) | AIF (max) | Cat | AV | Year | Quartile |
---|---|---|---|---|---|---|---|---|
Agricultural Water Management | 6.7 | 3.9 | 3.4 | 4.4 | 2 | 1.73 | 2022 | Q1 |
3.9 | ||||||||
3.965 | ||||||||
3.965 |
Journal | Cite Score | SNIP | SJR | Year | Quartile |
---|---|---|---|---|---|
Agricultural Water Management | 10.7 | 2.018 | 1.524 | 2022 | Q1 |