Correlations between growth and production variables of two coffee cultivars fertirrigated by microirrigation

This work aimed to address the correlations between growth and production variables of coffee cultivars fertigated by microirrigation. The experiment was conducted in experimental area of the Technical Irrigation Centerof the State University of Maringá. The coffee seedlings were planted at a spacing of 2.0 meters between rows and 1.0 meters between plants. The localized drip irrigation system was used so that the drippers were installed at 0.2 meters from the plants and were 0.40 m apart at the planting line and 2 m apart. The treatments applied to the plants of each coffee cultivar (Obatã and IAPAR-59), in this work, were formed by combining the four doses of NPK, with three crops (not irrigated, irrigated and fertigated), with a total of 24 treatments, with four repetitions, with ten plants, representing one repetition. In this experiment, a completely randomized design was adopted, with subdivided plots. The determination of simple correlations and partial correlations between growth and production variables was carried out using the Genes statistical software. Through partial correlations it was possible to verify the relationship between the growth and production variables of the plants, since it was highly significant in the irrigated and fertigated crops of the cultivars.