Influência de distintas lâminas de irrigação e percentuais de cinza da casca do arroz em substratos no desenvolvimento de cultivar de kalanchoe blosfeldiana poelln

Abstract

Ornamental production has been gaining a market and the need for correct cultural management is indispensable. The objective of this study was to evaluate the development of the "Debbie" cultivar of Kalanchoe blossfeldiana Poelln in different doses of irrigation and substrates composed of industrial and vegetable residues. The cultivar was developed with the use of materials: rice husk ash, soil, humus, commercial substrate and ground pine seed. Irrigation slides were applied with the dosages in relation to the water retention capacity in the vessel, of 70, 50, 30 and 20% according to CV. The scheme was bifatorial 4x4 in the completely randomized design, with four replications. The parameters of growth, development and final production of the culture were analyzed, the data were submitted to analysis of variance, all variables being significant at the 1% probability level, when applied the Tuckey test, except for number of leaves. The best results were observed for the substrate with zero percentage of rice husk ash. Diameter of stem (mm) and number of leaves had the best response in slides of 27 and 44.10% according to CV. The average daily consumption for the substrates was 0.99, 1.38, 1.08 and 1.26 mm.day -1, respectively. For root and aerial dry matter, the highest volume was obtained for treatments with 15% and 30% of rice husk ash for the slides of 70 and 20% of the CV. The cultivation coefficients obtained were 0.79, 1.03, 0.93 and 1.00 and the ideal substrate was the percentage of 35% of rice husk ash, satisfying density, air space and pore volume and Ideal solids.