Sensitivity analysis of the AquaCrop model for wheat crop in Campos Gerais region, Paraná

Autores

  • Stefanie Lais Kreutz Rosa UFPR
  • Jorge Luiz Moretti de Souza UFPR
  • Rodrigo Yoiti Tsukahara Fundação ABC
  • Edson Giovanni Kochinski Fundação ABC

Palavras-chave:

mathematical modeling, parameters, Triticum aestivum

Resumo

The use of crop modeling can be useful to understand the interactions between the soil-plant-atmosphere system. The objective of this study was to evaluate sensitivity analysis of the AquaCrop model parameters for wheat crop in the Campos Gerais Region. The varietie tested was TBIO Sinuelo in Castro, Ponta Grossa and Itaberá cities. The analyzed parameters refer to crop phenology, transpiration, biomass production, yield formation, stresses and soil management. The sensitivity analysis was realized varying individually each input parameter in the AquaCrop for the calculation of the Relative Sensitivity Index (SI). The most sensitive parameters of the AquaCrop were: reference harvest index (HIo); water productivity normalized for evapotranspiration and CO2 concentration (WP*); crop coefficient when canopy expansion is complete (KcTR,x); fertility levels; and maximum canopy cover (CCx). The higher sensitivity of HIo and WP* is because they are directly related to two main equations of AquaCrop, linked to the estimates of dry above-ground biomass and yield formation, respectively. The AquaCrop counts WP* reflecting directly on dry above-ground biomass production and on final grain yield. The canopy decline coefficient (CDC) presented considerable sensitivity only in Castro due to the longer duration of the phenological cycle. Fertility levels and saturated hydraulic conductivity (Ksat) in Castro was the least sensitive parameters in the analysis.

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Publicado

2025-06-03

Como Citar

Kreutz Rosa, S. L., Moretti de Souza, J. L., Yoiti Tsukahara, R., & Kochinski, E. G. (2025). Sensitivity analysis of the AquaCrop model for wheat crop in Campos Gerais region, Paraná. Revista Ceres, 70(1), 32–41. Recuperado de https://ojs.ceres.ufv.br/ceres/article/view/8077

Edição

v. 70 n. 1 (2023)

Seção

AGRICULTURAL ENGINEERING

Licença

Creative Commons License
Este trabalho está licenciado sob uma licença Creative Commons Attribution 4.0 International License.