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The objective of this work is to evaluate the effects of nitrogen doses on the ministrain of C. aurea conducted in minigarden system regarding productivity, rooting and root system quality of minicuttings at different seasons. The experiment was conducted at a greenhouse, and the treatments consisted of collection times (autumn, winter, spring and summer) and nitrogen doses (0, 0.3, 1.12, 1.95 and 3.60 g L-1). We evaluated the survival of ministrains, productivity of minicuttings, percentage of rooting and root dry matter. The experiment comprised randomized blocks in a 5 x 4 factorial design. Data were subjected to analysis of variance and polynomial regression, and means were compared by Tukey test at 5%. The mean productivity was 10.0 and 18.9 minicuttings per ministrain in the spring and summer, respectively. Rooting was hindered by the increase in nitrogen doses. We concluded that the survival of ministrains is influenced by nitrogen fertilization, and that the N dose 1.12 g L-1 provides better results for productivity and rooting of minicuttings when collected during the spring and summer.

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Nitrogen fertilization for ministrains of Campomanesia aurea O. Berg and its influence on productivity and rooting of minicuttings at different seasons of the year