zéro de germination

CONT: Température : Zéro de germination 5 °C. Le tournesol demande un climat chaud. Sa teneur en huile dépend beaucoup de la quantité de chaleur que reçoit la plante, tout particulièrement durant la phase de maturation des graines.
OBS: Les zéros de végétation ou de germination correspondent à des seuils climatiques.

CONT: It was observed that the germination in laboratory was significantly lower than the germination percentages printed on the envelope, being those ones 14; 55; 48 and zero of germination, while in the envelopes were displayed 65; 94; 80 and 80%, respectively. It was observed that the seeds had dormancy, since after the imbibition and pre-chilling treatment the germination percentages increased becoming 62; 80; 67, and 24%, respectively.