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Irrigation requirements and transpiration coupling to the atmosphere of a citrus orchard in Southern Brazil

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  • Marin, Fabio R.
  • Angelocci, Luiz Roberto

Abstract

Crop evapotranspiration (ETc) was measured as evaporative heat flux from an irrigated acid lime orchard (Citrus latifolia Tanaka) using the aerodynamic method. Crop transpiration (T) was determined by a stem heat balance method. The irrigation requirements were determined by comparing the orchard evapotranspiration (ETc) and T with the reference evapotranspiration (ETo) derived from the Penman-Monteith equation, and the irrigation requirements were expressed as ETc/ETo (Kc) and T/ETo (Kcb) ratios. The influence of inter-row vegetation on the ETc was analyzed because the measurements were taken during the summer and winter, which are periods with different regional soil water content. In this study, the average Kc values obtained were 0.65 and 0.24 for the summer and winter, respectively. The strong coupling of citrus trees to the atmosphere and the sensitivity of citrus plants to large vapor pressure deficits and air/leaf temperatures caused variations in the Kcb in relation to the ETo ranges. During the summer, the Kcb value ranged from 0.34 when the ETo exceeded 5 mm d-1 to 0.46 when the ETo was less than 3 mm d-1.

Suggested Citation

  • Marin, Fabio R. & Angelocci, Luiz Roberto, 2011. "Irrigation requirements and transpiration coupling to the atmosphere of a citrus orchard in Southern Brazil," Agricultural Water Management, Elsevier, vol. 98(6), pages 1091-1096, April.
    • Handle: RePEc:eee:agiwat:v:98:y:2011:i:6:p:1091-1096
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    Citations

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    Cited by:

    1. Rallo, G. & Paço, T.A. & Paredes, P. & Puig-Sirera, À. & Massai, R. & Provenzano, G. & Pereira, L.S., 2021. "Updated single and dual crop coefficients for tree and vine fruit crops," Agricultural Water Management, Elsevier, vol. 250(C).
    2. Marin, Fábio R. & Angelocci, Luiz R. & Nassif, Daniel S.P. & Costa, Leandro G. & Vianna, Murilo S. & Carvalho, Kassio S., 2016. "Crop coefficient changes with reference evapotranspiration for highly canopy-atmosphere coupled crops," Agricultural Water Management, Elsevier, vol. 163(C), pages 139-145.
    3. Gonçalves, I.Z. & Ruhoff, A. & Laipelt, L. & Bispo, R.C. & Hernandez, F.B.T. & Neale, C.M.U. & Teixeira, A.H.C. & Marin, F.R., 2022. "Remote sensing-based evapotranspiration modeling using geeSEBAL for sugarcane irrigation management in Brazil," Agricultural Water Management, Elsevier, vol. 274(C).
    4. da Silva, Evandro H.F.M. & Gonçalves, Alexandre O. & Pereira, Rodolfo A. & Fattori Júnior, Izael M. & Sobenko, Luiz R. & Marin, Fábio R., 2019. "Soybean irrigation requirements and canopy-atmosphere coupling in Southern Brazil," Agricultural Water Management, Elsevier, vol. 218(C), pages 1-7.
    5. Peddinti, Srinivasa Rao & Kambhammettu, BVN P, 2019. "Dynamics of crop coefficients for citrus orchards of central India using water balance and eddy covariance flux partition techniques," Agricultural Water Management, Elsevier, vol. 212(C), pages 68-77.

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