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Revista Brasileira de Engenharia Agrícola e Ambiental
versión impresa ISSN 1415-4366
GONDIM, Rubens Sonsol; AGUIAR, José Vanglésio de y COSTA, Raimundo Nonato Távora. Strategies of irrigation scheduling in cowpea. Rev. bras. eng. agríc. ambient. [online]. 2000, vol.4, n.1, pp.14-18. ISSN 1415-4366. http://dx.doi.org/10.1590/S1415-43662000000100003.
A field study was conducted from September to December 1997 at the Federal University of Ceará Experimental Farm in Pentecoste, Brazil. The irrigation scheduling was based on a tensiometer, Class A pan evaporation and Hargreaves equation. The purpose of the research was to evaluate the three treatments (Treatment 1 - tensiometer, Treatment 2 - pan evaporation and Treatment 3 - Hargreaves equation) with four replications in a completely randomized design. Sprinkler irrigated cowpea (Vigna unguiculata (L.) Walp), cultivar João Paulo II for fresh consumption was grown on the experimental area. Plants were spaced at 0.90 x 0.40 m, maintaining two plants per hole. Crop yield showed no significant difference, although using the tensiometer to schedule irrigation, the water consumption was 28 and 30% lower compared to the Class A Pan Evaporation and Hargreaves equation, respectively. The tensiometer may be indicated as an instrument for saving water in irrigation scheduling.
Palabras clave : tensiometer; Class A evaporation pan; Vigna unguiculata L. (Walp); water depth.