Efeitos da submersão em água na germinação de sementes e no crescimento inicial de plântulas de Lithraea molleoides (Vell.) em diferentes substratos

Abstract

The study aimed to analyze in which submergence seeds present best germination and substrate in which the seedlings will have a better development. Seeds were collected Lithraea molleoides (Vell.) and selected, we used six periods of submersion namely: 0, 2, 4, 8, 16, 32 days at the end of each period of submersion five replicates containing 40 seeds the physiological seeds was analyzed by means of the following tests: Index of germination velocity (IVG), mean germination time (MGT), fresh weight (FW), root fresh weight (RFW), shoot dry weight (SDW), root dry weight (RDW), stem diameter (DS), shoot length (LS) and root length (LR). To assess seedling growth on different substrates, the transplant was performed in tubes: Oxisol (O), sand (S), Oxisol + Sand (O + S) (1:1), Oxisol + Bioplant ® (O + Bio) (1:1) and Oxisol + Sand + Bioplant ® (O + S + Bio) (1:1:1). The features were analyzed at 50, 65, 80 and 95 days after sowing. The experimental design was a completely randomized factorial with substrates 5 x 4 time and 10 reps with one plant per pot. Seeds of L. molleoides not germinate in conditions of anoxia. The best substrate for development is Oxisol and Sand (O + S).