Efeito bioestimulante da biomassa de Chlorella sp. e seu potencial na produção de mudas de Meloeiro.

Abstract

Melon is a crop of great economic importance for the Northeast region. However, the development of alternative technologies that cause less environmental damage and favor the development of culture is of great importance for the region. That said, the application of suspensions with biostimulant effects based on microalgae in small amounts, favors the improvement of the soil, the formation of roots, the increase in the diameter of the stem and the dry matter. That way, the objective was to evaluate the biostimulant effect of different concentrations based on the microalgae Chlorella sp. applied to the soil for the production of 'Cantaloupe' and 'Amarelo' melon seedlings. Two experiments were carried out and suspensions were prepared with different concentrations of the microalgae Chlorella sp. 0.0%, 0.8% and 1.6% of distilled water. The experiments were evaluated at 15, 18, 21, 24 and 27 days after sowing, regarding the number of leaves, stem diameter, plant height, total leaf area, root length, shoot fresh mass, root, mass shoot dry mass, root dry mass, total dry mass and Dickson quality index. The tested concentrations did not influence the emergence percentage and emergence speed index. However, the application of 0.8 and 1.6% concentration of Chlorella sp. provided the greatest growth and accumulation of seedling biomass in most of the variables analyzed, and at 24 days after sowing, based on the parameters used for seedling classification, it was concluded that the seedlings are ready to be sent to the field.