Abstract

ANDRADE JUNIOR, A.S. de  and  KLAR, A.E. MANEJO DA IRRIGAÇÃO DA CULTURA DA ALFACE (Lactuca sativa L.) ATRAVÉS DO TANQUE CLASSE A. Sci. agric. [online]. 1997, vol.54, n.1-2, pp. 31-38. ISSN 0103-9016.  http://dx.doi.org/10.1590/S0103-90161997000100005.

An experiment was carried out to evaluate the effects of four irrigation levels, based on fractions of the Class A pan evaporation (0.25; 0.50; 0.75 e 1.00) on the yield and the water use efficiency of a lettuce crop, grown under plastic house conditions and drip irrigation, from July to September, 1993. The results of yield and fresh matter showed a quadratic response of the applied irrigation levels, with maximum values of 818.72 g and 90.97 t.ha-1 for the 0.75 Class A Pan evaporation level, respectively. The water use efficiency showed, however, a decreasing linear response with respect to the irrigation levels.

Keywords : lettuce; irrigation; management; class A pan.