Efeito de dosadores mecânicos sobre a emergência de canola

Abstract

The canola culture (Brassica napu L. var. Oleifera) has been used in the southern region of Brazil as an alternative way to crop rotation, especially for the issue of crop management. For the cultivation it is not necessary to acquire new specific equipment. The farmer can use the same machines he uses in other crops as wheat and soybeans. However, canola seeds present a greater risk of mechanical damage because they are very small and fragile, thus requiring greater care in relation to the seed dispenser of the sowing machine. This study aimed to evaluate the effect of mechanical dispensers on the emergence of canola. In the test, 3 different brands of precision mechanical dispenser were evaluated, in two different speeds. The results indicate that the seed dispenser with 128 holes with ramp do not harm the emergency, while the discs with 50 holes damage a large number of seeds, which impairs germination.