FREITAS, Paulo S. L. de.; REZENDE, Roberto.; STIPP, Oelcio J.; ZOLIN, Cornélio A.
Résumé:
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.
