Métodos de regeneração do mangal na Baía de Maputo

Abstract

A trial was conducted to test the influence of different seedling production methods in the nursery for two mangrove species, Avicennia marina and Rhizophora mucronata and to determine the best seedling production method for each species by analyzing growth in height and diameter of the mangrove. plant collar. Six (6) treatments were established for each species based on a combination of two factors (type of seedling - in pot and direct sowing; and environment - natural, faculty irrigated with salt water and faculty irrigated with drinking water), arranged in an experimental design completely randomized with five (5) replications and twenty (20) plants per plot. The treatments had the following designation: treatment 1 - watering vessel with drinking water, treatment 2 - watering vessel with sea water, treatment 3 - flood vessel, treatment 4 - direct watering with drinking water, treatment 5 - direct watering with sea water and treatment 6 - direct flooding. From the statistical analysis performed, treatments 3 and 4 for Avicennia marina and 3 and 6 for Rhizophora mucronata were significantly higher in the growth in height and stem diameter of the plants. These treatments produced seedlings with a mean growth in height of 33.56 and 39.60 cm and diameters of 0.53 and 0.52 cm for Avicennia and mean heights of 14.04 and 12.90 cm, diameters of 0.57 and 0.56 cm for Rhizophora without including the hypocotyl. Of these treatments, treatment 3 (pot in natural habitat) is recommended for Avicennia marina and 3 and 6 (direct sowing in natural habitat) for Rhizophora mucronata for use in reforestation programs in order to reconcile the aspects of production time ( greater growth in a short time) and better seedling quality (balanced root/stem index and a good stem diameter). The recommended treatments, although they present losses, they are low compared to (TRADUÇÃO NOSSA)