CONCENTRATION OF THE NUTRIENT SOLUTION FOR PRODUCTION OF YOUNG PLANTS OF Dietes bicolor (IRIDACEAE)
Abstract
There is a lack of technical information about the commercial production of young plants of Dietes bicolor Steud Sweet ex Klatt. This study, carried out at Floriculture Sector of Universidade Federal do Rio Grande do Sul (UFRGS), in Porto Alegre, RS/Brazil, had the objective to measure the vegetative growth of D. bicolor as affected by increasing fertilization level and its sensibility to salt concentration. Plants were weekly fertilized with tive concentrations of Weihenstephan nutrient solution: 0, 2, 4, 8 and 12 g/1. The experiment was designed in randomized blocks, with 4 replications and 10 plants per plot (one plant/pot of one liter volume). Plants were analyzed for the production of biomass and commercial quality. The salt accumulation in the substrate was quantified according to the total soluble salt concentration of leachates. Increasing the salt concentration, decreased the production of biomass and commercial quality. Plants fertilized with 2 g/1 solution showed excellent commercial quality.
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