Habilidade competitiva de cultivares de canola (Brassica napus l. var. oleífera) em convivência com o nabo (Raphanus sp.)

Abstract

The culture of canola has gained space in the Brazilian market, mainly in the southern region, as an option for winter cultivation, its most prominent use is in the oil market for consumption and biodiesel, main axes of growth of the crop, and byproducts, such as meal for animal feed. However, one needs to know about the behavior, in all its stages. A major factor limiting the production is carried competition by weeds, interference process that can lead to losses in both productivity and quality. Thus, the objective was to evaluate the competitive ability of canola cultivars (Brassica napus L. var. Oleifera) in coexistence with radish (Raphanus sp.). For it was conducted, the court, a trial with three canola genotypes in coexistence with different densities of turnip. The experimental design was a factorial 6 x 3, with randomized blocks, where the first factor was formed by canola genotypes: Hyola 61, Hyola 411 and Hyola 433 and the second factor the turnip densities (0, 2, 4, 8 , 16, 32 plants per m²). The turnip negatively interferes with the development and productivity of the canola crop, the damage is significant even with low population densities of weed, adding every turnip plant per square meter. The Hyola 411 and 433 Hyola cultivars showed higher productivity when compared to Hyola 61. The turnip caused loss of high productivity in all canola genotypes even at low populations, their control is necessary even in a situation of low density Turnip.