Influência de extrato aquoso da soja sobre a germinação da canola

Abstract

Cultivation of an economical alternative space for use in crop technology systems, canola (Brassica napus L.) is an oilseed species that has gradually been intelligent in crops in RS. Sown after the harvest of soybean (Glycine max [L.] Merril), and in rotation used with wheat (Triticum) producers - usually a winter crop - it can show as a great management option in the control of phytosanitary problems of grasses and legumes, among other benefits. However, allelopathic interactions between species are still poorly understood. Therefore, the objective of this work was to verify if the aqueous extract of soybean leaves from different technologies (RR® and INOX®) have allelopathic effects on seed germination and the initial development of canola plants. The bioassays for extracts were treated in 25 Gerbox boxes, totaling 12 treatments (concentrators of 0, 1, 2,5, 5, 7,5 and 10% of aqueous soybean), with four retentions, kept in a BOD-type incubator, without exposure to photoperiod and at a controlled temperature of 20°C. With the study, it can be seen that the aqueous extract of soybean leaves from INOX® and RR® technologies hurt germination, as well as on IVG, fresh mass, and root length of raw canola plants. However, about the length of the shoot, positive influences were found in the relations with the extension.