Consumo hídrico e coeficientes de cultivos simples e dual do coentro.

Abstract

The study was carried out in production unit of small vegetable of the Projeto Pequeno Produtor Grande Empreendedor in the city of Itabaiana, SE, Brazil, with coriander crop during the period from August 2, 2011 to October 12, 2011. The objective of this study was to determine the evapotranspiration and single and dual crop coefficients of coriander grown in tropical environment. The dual coefficient was obtained following FAO- nomenclature. The crop evapotranspiration was obtained based on soil water balance and reference evapotranspiration by Penman-Montcith method (FAOK56), using the data of air temperature, relative humidity, wind speed and solar radiation from automatic weather station next to experimental site. The coriander crop coefficient values for the growth stages: initial, development, mid-season and late season are, respectively, 0.82; 1.03; 1.07 e 0.93. Results also indicate that the dual crop coefficient approach can provide accurate estimates of water requirements for sugar cane growth in tropical environment.