Evapotranspiração e coeficiente de cultura do cafeeiro irrigado por pivô central
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Data
2011
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Resumo
Evapotranspiration and crop coefficient (Kc) were estimated through water balance for coffee crop (cultivar
Rubi), irrigated by center pivot. The experiment was carried out at the experimental area of Federal
University of Lavras. Randomized block was used as statistical design, with 6 treatment and 3 replicates.
The treatment levels were set by water depth applied as percentage of Kc values predefined and used by
farmers in the region, established as 60, 80, 100, 120 e 140% of the predefined Kc value for a given
period. The experiment included a control (non-irrigated), totalizing 18 plots, being considered in each
one 8 effective plants for measurements. According to results obtained for soil water potential, the best
treatment levels indicate coffee evapotranspiration of 3.46, 7.14 and 5.41 mm, for periods, B (April 4 to
July 31), C (August 1 to October 31) and D (November 1 to December 31) during 2007, respectively. For
periods A (January 1 to March 31) and B in 2008, the ETc values were 5.57 and 3.07 mm d -1 , respectively,
with average of 4.93 mm d -1 . The best Kc values found were 1.32, 1.06, 1.61 and 1.25 for periods A, B,
C and D, respectively.
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Palavras-chave
Irrigação, Café, Aspersão, Balanço hídrico, Sprinkler irrigation, Coffee, Water balance
Citação
SILVA, Antonio C. da; LIMA, Luiz A.; EVANGELISTA, Adão W. P.; MARTINS, Carla P. Evapotranspiração e coeficiente de cultura do cafeeiro irrigado por pivô central. Revista Brasileira de Engenharia Agrícola e Ambiental, Campina Grande, v. 15, n. 2, p. 1215-1221, 2011.