Banca de DEFESA: WILLIAN PEREIRA DO NASCIMENTO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : WILLIAN PEREIRA DO NASCIMENTO
DATE: 29/07/2025
TIME: 10:00
LOCAL: Plataforma on line
TITLE:

USE OF MICROALGAE REMOVED FROM LAKE AÇU FOR THE DEVELOPMENT OF ORGANOMINERAL FERTILIZER

KEY WORDS:

maize; sustainability; eutrophication.

PAGES: 20
BIG AREA: Ciências Agrárias
AREA: Engenharia Agrícola
SUBÁREA: Engenharia de Água e Solo
SPECIALTY: Conservação de Solo e Água
SUMMARY:

Brazil has a high dependence on imported mineral fertilizers, which increases agricultural production costs and contributes to environmental impacts such as soil acidification and the eutrophication of water bodies. In this context, organomineral fertilizers, which combine mineral nutrients and organic matter, present a promising alternative. This study aimed to evaluate the use of microalgae from Lago Açu, an eutrophic water body located at the Federal Rural University of Rio de Janeiro (UFRRJ), in the formulation of organomineral fertilizers (OMF). The microalgae were cultivated using the Algal Turf Scrubber (ATS) system, collected weekly, dried, ground, and chemically and biologically characterized. The biomass was used in different proportions and combined with mineral sources of phosphorus and potassium to formulate the OMF, which were applied to pots containing two types of soil (Argisol and Planosol) cultivated with maize (Zea mays L.). The experiment was conducted for 45 days in a randomized block design, in a 2x7 factorial scheme, with four replicates. The dry mass of the aerial part of the plants and the effects of the treatments on the chemical properties of the soil were evaluated. Data were analyzed by ANOVA and Tukey's test at 5% significance. The results showed that the application of microalgae-based OMF improved plant nutrition and soil fertility, demonstrating the potential of this biomass as a sustainable agricultural input.

COMMITTEE MEMBERS:
Interno - 1133133 - HENRIQUE VIEIRA DE MENDONCA
Externo ao Programa - 1282206 - JULIANO BAHIENSE STAFANATO - UFRRJExterno à Instituição - DAVID VILAS BOAS DE CAMPOS - EMBRAPA