Open AccessEnergy balance in a renewal sugarcane area with fallow period and soybean cultivation
Author(s) -
Rubmara Ketzer Oliveira,
Luciano Sobral Fraga,
Larissa Brêtas Moura,
Débora Regina Roberti,
Felipe Gustavo Pilau
Publication year - 2020
Publication title -
ciência e natura
Language(s) - English
Resource type - Journals
eISSN - 2179-460X
pISSN - 0100-8307
DOI - 10.5902/2179460x53222
Subject(s) - latent heat , energy balance , eddy covariance , environmental science , sensible heat , agronomy , closing (real estate) , flux (metallurgy) , bowen ratio , geography , ecosystem , biology , ecology , meteorology , chemistry , organic chemistry , political science , law
Brazil is the main sugarcane producer in the world, which is intended for various purposes, from food to power generation. Soybean cultivation in areas of sugarcane under renewal has been growing progressively in Brazil. Quantifying energy fluxes at different stages of this process is essential for better management. The work was carried out in Piracicaba city, with the objective of analyzing the behavior of energy fluxes and the closing of the energy balance in a sugarcane renewal area with a fallow period followed by soybean cultivation. The latent and sensitive heat fluxes were obtained with the “Eddy covariance” method. The closing of the energy balance in the fallow period with straw-covered uncovered and soybean-cultivated soil presented a correlation coefficient of 0.88, 0.78 and 0.71, respectively. In the period without cultivation, the sensible heat flux was predominant in relation to the latent heat flux, varying according to the rainfall regime. The presence of straw under the soil in the fallow period affected the latent heat flux. With soybean cultivation, the latent heat flux surpassed the sensible heat flux.