Evapotranspiration Soybean: Comparison Between Eddy Covariance Method and the Estimate of Cropgro-Soybean Model

Evandro Chaves de Oliveira, Waylson Zancanella Quartezani, Leonardo de Oliveira Neves, Leonardo José Gonçalves Aguiar, Graciela Redies Fischer, Débora Regina Roberti, Geilson Silva Costa, José Maria Nogueira da Costa

Abstract


The performance of CROPGRO - Soybean model for soybean evapotranspiration simulation was assessed using data derived from field experiments using eddy covariance method conducted by Network Sulflux (Brazilian South Network Surface Flows and Climate Change ) Cruz Alta, Rio Grande do Sul State - Brazil , (28° 36' S, 53° 40' W and altitude 409 m), in the agricultural year 2009/2010. The results indicate that the model overestimates evapotranspiration throughout the crop cycle, probably it does not represent realistically the crop residues, indicating a need for adjustments in water balance parameters in the soil in no-till system.


Keywords


DSSAT . Till. Water balance in soil.

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DOI: https://doi.org/10.5902/2179460X19885

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