INFLUENCE OF SHADING ON THE QUALITY OF THE SEEDLINGS MANGROVE CULTIVATED IN NURSERY.

Abstract

In the need to cultivate quality plants, the importance of producing seedlings in nursery, as they have greater robustness. Therefore, the aim was to investigate the effect of shading on the parameters and morphological indices of seedlings of mangrove tree species produced in nursery. The propagules of the mangrove species were sown under two conditions: 0% (Full sun) and 70% of shade, and remained for 360 days under these conditions. Bimonthly a certain number of seedlings were transported to the laboratory. The parameters evaluated were total height (H), stem diameter (DC) and height/diameter ratio (H/D). The data were tested in the Primer v 0.6 statistical package, by making similarity matrices from the original biological matrix and using the Bray-Curtis coefficient, the similarity analyzes (ANOSIM) compared the species structure in terms of treatments: Full sun and 70% shade. The means generated by descriptive statistics were compared by the Duncan test at 5%.  It was concluded that the 70% shading favored the growth in height and diameter of R. mangle, A.germinans and L. racemosa seedlings, and provided higher quality seedlings. Based on the results, shading for the production of mangrove seedlings is recommended.