Desenvolvimento e crescimento de Kalanchoe Blosfeldiana Poelln submetida a diferentes métodos de irrigação

Abstract

The objective of this work was to evaluate the irrigation methods on the growth and development of kalanchoe blossfeldiana Poelln cultivar 'Debbie'. The experiment was carried out in a greenhouse, located in the experimental area of the Agricultural Engineering course of the Federal University of Pampa Campus Alegrete / RS, in a three-factorial scheme (2x5x2) in a completely randomized design with four replications, totaling 80 experimental units. Seedlings were prepared by cutting method in Styrofoam trays filled with commercial substrate and when they reached four leaves, they were transplanted to plastic pots filled with commercial substrate with capacity of 0.91 L. Irrigation by sub-irrigation was performed by capillary ascension. in plastic basins according to the height of the water load and the time, and by surface applied with a manual beaker according to the water retention capacity in the vessel (CV). The water consumption of the cultivar was defined using the water balance method, and the crop coefficients were obtained through the relationship between the actual crop evaporation and the reference evapotranspiration. Throughout the experiment were evaluated the plant height, leaf area, number of flowers, number of leaves. Data were subjected to statistical analysis at 1% and 5% probability. Through the results, a significant interaction was observed between the factors at the 1% probability level for the leaf area variable. In all analyzed variables the water load was significant. Irrigation methods were significant at 1% probability only in leaf area parameters. The average daily water consumption was 1.60 mm.day-1. The cultivar under study obtained higher growth, development and productivity when submitted to a water loading height of 7.5 cm, in the time corresponding to 10% of the CV time.