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Revista Brasileira de Fruticultura

Print version ISSN 0100-2945On-line version ISSN 1806-9967


TEIXEIRA, Antônio Heriberto de Castro et al. Evaluation of water consumption of guava trees by automatic and conventional agrometeorological stations. Rev. Bras. Frutic. [online]. 2003, vol.25, n.3, pp.457-460. ISSN 0100-2945.

The crop evapotranspiration (ETc) and the crop coefficient (Kc) of guava cv. Paluma irrigated with a microsprinkler were estimated for two years and three months after planting and over one growing season at Petrolina, Pernambuco State, Brazil. The ETc was estimated by Bowen ratio, and the reference evapotranspiration (ETo) was estimated using data collected by conventional and automatic agrometeorological stations. The accumulated ETc from pruning (June 2001) to harvest (December 2001) was 906 mm in 200 days, which corresponds to an average of 4.53 ± 0.68 mm day-1. Kc varied from 0.75 to 0.93 when the conventional station was used, and from 0.61 to 0.84 when using an automatic station.

Keywords : Psidium guajava L.; energy balance; evapotranspiration; crop coefficient.

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