Resumen

RODRIGUEZ, Rafael  y  PIRE, Reinaldo. Daily evapotranspiration of tomato using weighing lysimeter. Agronomía Trop. [online]. 2008, vol.58, n.1, pp.73-76. ISSN 0002-192X.

Recently indirect method have been used for getting reference crop evapotranspiratión (ETo), however results from those methods and their relations with other crops are not tested properly. Between the years 2004 and 2005 in Tarabana (Lara State of Venezuela) a research was conducted for estimation and measurements of ETc and ETr for tomato, Lycopersicon esculentun M., using a weighing lysimeter and six methods for ETo including Kc and direct measurements with lysimeters. The values including results between 2,95 and 7,3 mm d-1 in 2004 and 3,3 and 8,62 in the 2005. Kc values were 0, 64 and 0,78; 1,14 and 1,30; and finally 0,5 and 1,22 during initial, development and late state respectively. The highest correlation was found for Penman - Monteith.

Palabras clave : Fenología; tomate; riego.