Influência do extrato de alga (Ascophyllum nodosum) sobre o desempenho da cultura da canola

Abstract

The canola's crops (Brassica napus L. Var. Oleifera) is one of the main oleaginous crops grown in Brazil, but studies on methods that increase its productive potential are still necessary. Therefore, the objective of this work was to verify the influence of the seaweed extract (Ascophyllum nodosum) applied through seed treatment and in foliar applications on the canola's performance. The research was realized in the experimental area of the Universidade Federal da Fronteira Sul (UFFS), in Cerro Largo / RS, and it was utilized a randomized complete block design (DBC) was used in a two- factorial arrangement (2 x 4) with subdivided plots. The first factor consists of: With seed treatment (2 ml / kg) of A. nodosum extract and without seed treatment. The other factor evaluates the foliar application of the extract (1 L/ha), being performed in stages B5 (Vegetative), F1 (Beginning of Flowering) and B5 (0,5 L/ha) plus F1 (0,5 L/ha) and No Foliar Application. The parameters stem diameter, plant height, leaf area, shoot dry mass, number of silicas per plant, grain mass per silica, weight of one thousand grains and crop yield were evaluated. After the data collection, they were submitted to analysis of variance and interpreted with aid of the statistical program Assistat, and the means compared by the Tukey test at a 5% probability level. Only showed statistical superiority for stem diameter at 43 DAS in the seed treatment factor, with an increase of 26% over this parameter, where the application of the extract of A. nodosum via seeds was efficient in this case.