SUPERAÇÃO DE DORMÊNCIA E PROFUNDIDADE DE SEMEADURA DE SEMENTES DE GRAVIOLEIRA

Abstract

The objective of this work was to evaluate sowing depth and seed dormancy breaking method in the formation of seedlings of the soursup rootstock cv RBR. The experiment was conducted under greenhouse conditions at the orchard of the Lavras Federal University - UFLA. The experimental design was in randomized blocks in a two factors arrangement (4x3), with four replicates and five plants per plot. The dormancy breaking treatments were: witness (control); immersion in water (25 °C for 12 hours); immersion in water (25 °C per 24 hours) and side cut on the seed. The seeds were sowed at 1, 2 and 3 cm of profundity. The characteristics evaluated were germination velocity; germination percentage and after 120 days of sowing the seedlings height (cm); rootsand aerial part fresh matter (g) and roots and aerial part dry matter (g) were also evaluated. There was notinteraction of dormancy brake treatments with the seeds profundity. Seed germination was not influenciated by theprofundity that the seeds were sowed. The side cut on the seed did not provide different results of germination percentage and germination velocity compared to the other treatments, but presented higher of seedlings height.