EFEITOS DE DIFERENTES LÂMINAS DE IRRIGAÇÃO NO DESENVOLVIMENTO DO CAFÉ CONILON (Coffea canephora), EM CAMPOS DOS GOYTACAZES - RJ

Abstract

: The goal of this work was to study the vegetative growth of coffee conilon able to irrigation by surfasse and subsurface drip with diferente water blades applied in Campos dos Goyacazes municipality. For this, an experiment was installed in an existing field in the area belonging to the PESAGRO-RIO Experimental Station, in Campos dos Goytacazes, RJ. The genotypes used were clones of the Vitória variety. The experimental design was a randomized block with four replications in a split plot. The irrigation was carried out with a localized drip system and determined by ETo, calculated with data from an agrometeorological station installed near the experiment. The spacing used was 2.5 m between lines and 1.5 m between plants, totaling an area of 22.5 m 2 per subplot and useful area of 15 m 2 subplot. Each subplot consisted of six plants, both ends being bordered. To facilitate the management of irrigation, emitters with different flow rates were used, and the whole experiment could be irrigated at once, and the control of the applied blades was performed as a function of the flow rates of the emitters. For better expression of the development factor, agronomic data of plant height, average crown diameter, stem diameter and length of the first plagiotropic branch, number of internodes and lengths of lateral shoots were evaluated monthly. By the Tukey Test (T Test) at 5% significance, it was possible to verify that the application forms (Factor I) did not present significance for the evaluated characteristics, except for plant height and lateral branch 1. And by the analysis of variance, the different irrigation depths (Factor II) showed significant for all the evaluated characteristics. The 100% ETo blade, in general, presented greater increment for the analyzed characteristics.