Calibration and validation of FAO-AquaCrop model to estimate the total biomass and yacon root yield

Authors

  • Ramon Amaro de Sales 1. Departament of Plant Science, Federal University of Viçosa, Minas Gerais, Brazil;
  • Alexandre Cândido Xavier 2. Center of Agrarian Sciences and Engineering, Federal University of Espirito Santo, Espírito Santo, Brazil;
  • Evandro Chaves de Oliveira 3. Federal Institute of Education, Science and Technology of Espírito Santo - Campus Itapina, Espírito Santo, Brazil;
  • Fábio Luiz de Oliveira 2. Center of Agrarian Sciences and Engineering, Federal University of Espirito Santo, Espírito Santo, Brazil;
  • Diego Mathias Natal da Silva 4. Federal Institute of Education, Science and Technology of Southeast Minas Gerais - Campus Manhuaçu, Minas Gerais, Brazil
  • Sávio da Silva Berilli 3. Federal Institute of Education, Science and Technology of Espírito Santo - Campus Itapina, Espírito Santo, Brazil;

Keywords:

Smallanthus sonchifolius, root yield simulation, modelling, agrometeorology

Abstract

Due to the current water scarcity in the world, it is extremely important to improve the use of this natural and exhaustible resource in agriculture, by contributing to increase agricultural production and sustainability. Several models of crop growth simulation were developed to predict the edaphoclimatic effects on crop yield. These models are calibrated and validated for a given region using the data generated from field experiments. Therefore, the objective of this study was to calibrate and validate the FAO AquaCrop model for yacon (Smallanthus sonchifolius) crop in a tropical climate. The experiment was conducted in an experimental area located in the municipality of Ibatiba, state of Espírito Santo (Brazil) during the years of 2013 and 2014. The calibration was done using the Autumn planting and validation with the Winter and Spring plantings. For the statistical analysis, the coefficient of determination, Willmott concordance index, bias for the systematic error, root mean square error and the mean absolute error to test the model performance were used. In general, the FAO AquaCrop model predicted the root yield, total biomass and harvest index with acceptable accuracy, and with deviations of less than 6% for total and root biomass. Late planting of yacon showed a reduction in yield as well as total biomass. Keywords: Smallanthus sonchifolius, root yield simulation, modelling, agrometeorology DOI: 10.25165/j.ijabe.20201303.5012 Citation: de Sales R A, Xavier A C, de Oliveira E C, de Oliveira F L, da Silva D M N, Berilli S S. Calibration and validation of FAO-AquaCrop model to estimate the total biomass and yacon root yield. Int J Agric & Biol Eng, 2020; 13(3): 123–128.

Author Biographies

Alexandre Cândido Xavier, 2. Center of Agrarian Sciences and Engineering, Federal University of Espirito Santo, Espírito Santo, Brazil;

Center of Agrarian Sciences and Engineering Department of Rural Engineering

Fábio Luiz de Oliveira, 2. Center of Agrarian Sciences and Engineering, Federal University of Espirito Santo, Espírito Santo, Brazil;

Center of Agrarian Sciences and Engineering

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Published

2020-06-08

How to Cite

de Sales, R. A., Xavier, A. C., de Oliveira, E. C., de Oliveira, F. L., Natal da Silva, D. M., & da Silva Berilli, S. (2020). Calibration and validation of FAO-AquaCrop model to estimate the total biomass and yacon root yield. International Journal of Agricultural and Biological Engineering, 13(3), 123–128. Retrieved from https://www.ijabe.migration.pkpps06.publicknowledgeproject.org/index.php/ijabe/article/view/5012

Issue

Vol. 13 No. 3 (2020): IJABE

Section

Natural Resources and Environmental Systems

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