Influência da temperatura na emergência de plântulas de canola

Abstract

Canola is one of the main oilseeds grown in the world and is considered as the new option for the production of vegetable oil. The knowledge of the germination process allows the use of varieties intended for agriculture for the use of genetic characteristics useful for the improvement of cultivars, in addition to being useful for the conservation of species in their place of origin and in the composition of germplasm banks. Thus, the present study aimed to verify the influence of temperature on the emergence of canola seedlings. The experiment was conducted at the Seed Analysis Laboratory (LASEM), Institute of Agricultural Sciences, Federal University of Uberlandia, in a completely randomized block design with four replications in a 3x2 factorial scheme, with 3 temperatures (20ºC, 30ºC and 20 -30ºC alternating) for emergence in sand, combined with two canola hybrids (Hyola 350TT and Hyola 433). The readings were taken daily at predefined times (6:00 am, 2:00 pm and 10:00 pm) for a period of 7 days. The number of emerged seedlings and the emergence speed index (IVE) were analyzed. There was a significant interaction between canola hybrids and temperature in the emergency for the percentage variable of emerged seedlings. The Hyola 433 hybrid, responded significantly at temperatures of 20-30ºC alternating or 30ºC constant. The evaluation of the IVE pointed out that there was no interaction between the factors analyzed. Temperature is a factor that influences