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

Autor(es)

de Oliveira, Luciano Alves ^[1] ; Honorio, de Miranda Jarbas ^[1] ; Grecco, Katarina L. ^[1] ; Tornisielo, Valdemar Luiz ^[2] ; Woodbury, Bryan L. ^[3]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: Journal of Environmental Management; v. 248, OCT 15 2019.
• Citações Web of Science: 0

Resumo

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)

• Processo FAPESP: 17/07443-6 - Simulação da dinâmica da atrazina pelo modelo HYDRUS 2D sob cultivo de milho em regiões de solo tropical e temperado
• Beneficiário: Luciano Alves de Oliveira
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 18/01915-6 - Simulação da dinâmica da atrazina pelo modelo Hydrus 2D sob cultivo de milho em regiões de solo tropical e temperado
• Beneficiário: Luciano Alves de Oliveira
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 18/10164-4 - Simulação da dinâmica da atrazina, nitrato, fósforo e potássio em solos não saturados pelo modelo Hydrus
• Beneficiário: Jarbas Honorio de Miranda
• Modalidade de apoio: Auxílio à Pesquisa - Regular