Uso do bioestimulante à base de algas marinhas e água residuária de piscicultura na produção de mudas de Mulungu( Erythrina Velutina Wild) em solo de área degradada

Abstract

Water is an increasingly scarce natural resource, especially in the agricultural area, being a decisive factor in the production of forest seedlings for the recovery of degraded areas. By integrating aquaculture with agriculture, from the reuse of fish farming wastewater, it has been a more sustainable strategy for the use and maintenance of water resources, especially for the cultivation of native species such as Mulungu (Erythrina velutina Wild). The objective of this research was to evaluate the use of marine algae biostimulants and different doses of fish farming wastewater in the production of mulungu seedlings in degraded area soil. The experiment was conducted from October to December 2020 in the experimentation area of the Research, Teaching and Extension in Shrimp Farming group – LABPEC (EAJ/UFRN). A randomized block design (DBC) was used and for each block of the experiment, eight treatments were applied with four replications, corresponding to the combinations between doses of biostimulants (0.0 or 100g) and fish farming wastewater (ARP) applied in the irrigation of plants in concentrated or diluted with sweetwater form in the proportions ARP:AD (0:100; 50:50; 75:25 and 100:0). The following variables were analyzed: number of leaves, stem diameter, plant height, root length, shoot fresh mass, shoot dry mass, root system dry mass and root system fresh mass. The results showed that the addition of the biostimulant did not promote growth in mulungu seedlings. However, treatments irrigated with 50% of fish farm wastewater provided a better development of mulungu seedlings under the experimental conditions evaluated.