Measurement and modelling of water flows and pesticide leaching under low input cropping systems.

Autor: Mamy L; Université Paris-Saclay, INRAE, AgroParisTech, UMR ECOSYS, 91120 Palaiseau, France. Electronic address: laure.mamy@inrae.fr., Marín-Benito JM; Université Paris-Saclay, INRAE, AgroParisTech, UMR ECOSYS, 91120 Palaiseau, France; Institute of Natural Resources and Agrobiology of Salamanca (IRNASA-CSIC), Cordel de Merinas 40-52, 37008 Salamanca, Spain., Alletto L; Université de Toulouse, INRAE, UMR AGIR, F-31326 Castanet-Tolosan, France., Justes E; Université de Toulouse, INRAE, UMR AGIR, F-31326 Castanet-Tolosan, France; CIRAD, Persyst Department, Avenue Agropolis, 34398 Montpellier, France., Ubertosi M; Agroécologie, INRAE, Institut Agro, Univ. Bourgogne, Univ. Bourgogne Franche Comté, 21000 Dijon, France., Munier-Jolain N; Agroécologie, INRAE, Institut Agro, Univ. Bourgogne, Univ. Bourgogne Franche Comté, 21000 Dijon, France., Nicolardot B; Agroécologie, INRAE, Institut Agro, Univ. Bourgogne, Univ. Bourgogne Franche Comté, 21000 Dijon, France., Bonnet C; Université de Toulouse, INRAE, UMR AGIR, F-31326 Castanet-Tolosan, France; Université de Toulouse, INRAE, UMR DYNAFOR, 31326 Castanet-Tolosan, France., Moeys J; Swedish University of Agricultural Sciences (SLU), Department of Soil and Environment, Box 7014, 750 07 Uppsala, Sweden; Statistics Sweden (SCB), Environmental Accounts and Environment, Solna strandväg 86, 171 54 Solna, Sweden., Larsbo M; Swedish University of Agricultural Sciences (SLU), Department of Soil and Environment, Box 7014, 750 07 Uppsala, Sweden., Pot V; Université Paris-Saclay, INRAE, AgroParisTech, UMR ECOSYS, 91120 Palaiseau, France., Bedos C; Université Paris-Saclay, INRAE, AgroParisTech, UMR ECOSYS, 91120 Palaiseau, France., Benoit P; Université Paris-Saclay, INRAE, AgroParisTech, UMR ECOSYS, 91120 Palaiseau, France., Barriuso E; Université Paris-Saclay, INRAE, AgroParisTech, UMR ECOSYS, 91120 Palaiseau, France.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2024 Nov 27; Vol. 957, pp. 177607. Date of Electronic Publication: 2024 Nov 27.
DOI: 10.1016/j.scitotenv.2024.177607
Abstrakt: One current challenge in sustainable agriculture is to redesign cropping systems to reduce the use and impacts of pesticides, and by doing so protect the environment, in particular groundwater, and human health. As a large range of systems could be explored and a wide number of pesticides used, field experiments cannot be carried out to study the sustainability of each of them. Thus, the objectives of this work were (1) to measure water flows and pesticide leaching in six contrasted low input cropping systems based on sunflower-wheat rotation, oilseed rape-wheat-barley rotation, and maize monoculture, experimented for three years in three different soil and climatic conditions, and (2) to assess and to compare the ability of three pesticide fate models (MACRO, PEARL, PRZM) to simulate the observed water flows and pesticide concentrations. The systems were designed using various crop rotations, including cover crops and intercrops. The models were parameterized with generic parameter estimation routines as done for regulatory risk assessment, and a method was developed to parameterize intercrops, not represented in the models: the use of average crop factors, maximum LAI, crop height and rooting depth of the crops constituting the intercrop allowed acceptable simulations of cumulative water flows, but not their dynamic. Twelve pesticides of 70 applied were quantified in lysimeter samples (e.g. bentazone, glyphosate, S-metolachlor), and their concentrations exceeded 0.1 μg L -1 in several occasions. The performance of the models to reproduce pesticide concentrations was generally poor illustrating the great challenge and the progress needed to simulate accurately pesticide transfers into the soil. The best fits to measured data were attained using "worst-case" pesticide sorption and degradation parameters. Overall, MACRO performed better than PEARL and PRZM. The method developed to parameterize intercrops could be used for risk assessment of groundwater contamination by pesticides in low input cropping systems, but the use of the three models without any calibration is likely to underestimate pesticide leaching in several situations.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 The Authors. Published by Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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