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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Atrazine movement in corn cultivated soil using HYDRUS-2D: A comparison between real and simulated data

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de Oliveira, Luciano Alves [1] ; Honorio, de Miranda Jarbas [1] ; Grecco, Katarina L. [1] ; Tornisielo, Valdemar Luiz [2] ; Woodbury, Bryan L. [3]
Total Authors: 5
[1] Univ Sao Paulo, Luiz de Queiroz Coll Agr ESALQ, Dept Biosyst Engn, LEB, Ave Pddua Dias 11, BR-13418900 Piracicaba, SP - Brazil
[2] Univ Sao Paulo, CENA, Ecotoxicol Lab, Cx 96, BR-13400970 Piracicaba, SP - Brazil
[3] USDA ARS, Meat Anim Res Ctr, POB 166, Clay Ctr, NE 68933 - USA
Total Affiliations: 3
Document type: Journal article
Source: Journal of Environmental Management; v. 248, OCT 15 2019.
Web of Science Citations: 0

Atrazine is an herbicide that is applied in corn around the world and in sugarcane in Brazil. It is known to be hazardous for animals' health, mobile in the soil, and its analysis is considered expensive and onerous. Solute movement studies are essential to provide information about dangerous molecules movement, which can avoid contamination. While field investigations demand time and financial resources, numerical models are an alternative to describe water and solute distribution in the soil profile. Thus, the objective of this work was to use HYDRUS 2-D model for simulations of atrazine movement in containers packed with tropical soil cultivated with corn and to compare simulated and observed data through statistical parameters. The research was carried out in a greenhouse during 116 days after planting. Atrazine was analyzed in the soil solution at three different depths to validate HYDRUS-2D. Simulations were carried out using hydraulic properties fitted directly to measured retention data and parameters for corn growing and atmospheric characteristics. The mixed procedure analysis indicated that there are differences in atrazine concentration among depths and along time. In general, atrazine concentration is higher at shallow depths and right after application. However, it is possible to find atrazine in deeper soil layers, which might be a concern regarding contamination. RMSE, Willmott and Pearson coefficients indicated a favorable capacity of the model to simulate atrazine concentration on corn cultivation. HYDRUS-2D is a reliable tool to obtain trends in atrazine movement under these experiment's conditions. The uptake parameters, the crop root growth and distribution parameters depend on further specific studies to better describe the relationship between the plant and atrazine and meteorological parameters need to be updated. (AU)

FAPESP's process: 17/07443-6 - HYDRUS 2D simulation of atrazine movement in tropical and temperate soils under maize cultivation
Grantee:Luciano Alves de Oliveira
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 18/01915-6 - Hydrus 2D simulation of atrazine movement in tropical and temperate soils under corn cultivation
Grantee:Luciano Alves de Oliveira
Support Opportunities: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 18/10164-4 - Simulation of atrazine, nitrate, phosphorus, and potassium dynamics in unsaturated soils using the Hydrus software
Grantee:Jarbas Honorio de Miranda
Support Opportunities: Regular Research Grants