Banca de QUALIFICAÇÃO: EDUARDO PEREIRA DA ROCHA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : EDUARDO PEREIRA DA ROCHA
DATE: 30/05/2025
TIME: 08:30
LOCAL: Departamento de Solos
TITLE:

Bioinput obtained from composting waste from the beer agroindustry as an alternative for growing vegetables

KEY WORDS:

Organic fertilizer. Sustainable agriculture. Circular economy.

PAGES: 35
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Fitotecnia
SUMMARY:

The increase in global demand for food, combined with growing concerns about environmental sustainability, is driving the search for more efficient and environmentally friendly agricultural practices. In this scenario, the reuse of agro-industrial waste from beer production, such as malt bagasse and hop crop residues, has the potential to mitigate environmental impacts, mainly caused by the improper disposal of these residues, and to generate sustainable agricultural inputs. Given the above, the general objective of this study is to evaluate the potential of the bioinput obtained from the composting of waste from the beer agro-industry (malt bagasse and hop crop residues) for the cultivation of vegetables. The specific objectives are: a) to evaluate the composting process of these residues and characterize their chemical and elemental composition over 90 days, aiming at obtaining a biostabilized organic compound (BOC); b) to evaluate the phytotechnical performance of root, leaf and fruit vegetables, such as radish, arugula and cucumber, when subjected to fertilization with the formulated BOC; and c) to compare the levels of heavy metals in the soil and plants after fertilization with the biostabilized compound and with soluble mineral fertilizers. To this end, the waste will be collected at the factory and at the Grupo Petrópolis farm, in Teresópolis, RJ. The eucalyptus sawdust will be obtained through the processing of untreated supports. The characterization of the material will include analyses of pH, electrical conductivity (EC), moisture, total carbon and nitrogen, particle size, density, macro and micronutrients, in addition to the presence of heavy metals. The composting process will be conducted for 90 days, with temperature monitoring and humidity adjustment to 50-60%. Throughout the process, material will be collected at 0, 7, 14, 21, 30, 60 and 90 days for subsequent analysis of the parameters previously listed in the characterization of the residues, in addition to the evaluation of CO2 and NH3 emissions. Subsequently, the experiments will be installed in pots in a greenhouse at UFRRJ, with the 3 vegetables, using a randomized block design, with a 2x3+2 factorial arrangement in four replicates per crop. The treatments will be: 2 fertilizers (fresh MB and BOC), 3 doses, and two additional treatments (no fertilization and mineral fertilization). The parameters fresh and dry mass of the aerial part and root, diameter and mass (dry and fresh) of the fruits, total mass per plant, production per plant and accumulated levels of nutrients and toxic elements will be evaluated. The soil will also be analyzed after cultivation to verify chemical changes. The data will be analyzed for normality and homoscedasticity. They will then be subjected to analysis of variance (p <0.05), and when significant, they will be compared by the Tukey test or by regression models. They may also be subjected to principal component analysis to verify the relationships between soil and plant parameters in the different treatments. It is expected that the compound will have agronomic potential to partially or totally replace mineral fertilizers, promoting gains in the production and quality of vegetables, improving the chemical properties of the soil and reducing environmental contamination.

COMMITTEE MEMBERS:
Presidente - 1412091 - ERICA SOUTO ABREU LIMA
Interno - ***.960.133-** - EDNALDO DA SILVA ARAÚJO - EMBRAPA
Externo à Instituição - CARLOS ANTÔNIO DOS SANTOS