Avaliação da altura e produção da cultura de pupunha (Bactris Gasipaes Kunth) irrigada no noroeste do Paraná.

Abstract

This experiment was carried out under field conditions of the Campus Experimental do Arenito, in Cidade Gaúcha county, Paraná State, in Brazil, at 23º 22’ SL, 52º 56’ WL and altitude of 404 meters to verify the effects in the plant height and yield of the pupunha palm trees of two irrigation systems, the microsprinkler and the drip irrigation, using four quantities of water in a randomized block design. The quantities relative to 100%, 75%, 50%, 25% of water depth evaporated from a Class A Pan were applied into the soil and compared to the control. The plants were irrigated in a constant time interval of two days. The plant height was taken in november, 2003 and no difference was found (P>0.05) within the irrigated treatments, but all trees in the control were found dead in the early stages of plant development. The use of the Class A Pan indicate 25% of water evaporation as a quantity of water high enough to promote the tree development under those field conditions. Quadratic responses were found for yield of tree in both irrigation systems, and the maximum for the microsprinkler was 3910 kg.ha-1, and 3311 kg.ha-1 was found under drip irrigation.