Banca de DEFESA: WELDER LOPES LOYOLA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : WELDER LOPES LOYOLA
DATE: 29/02/2024
TIME: 14:00
LOCAL: meet.google.com/tad-nqgm-hvq
TITLE:

Microbiome enrichment practices in corn production: a study carried out in the municipality of Taiobeiras, State of Minas Gerais

KEY WORDS:

Corn. Soil. Rhizospheric microbiome. Inoculant. Compost. Gongocompost

PAGES: 21
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUMMARY:

Brazil is the third largest producer of corn (Zea mays) in the world, however, the production chain is very dependent on the import of agricultural inputs. Among the alternatives capable of contributing to the increase of product and soil preservation, the enrichment of rhizospheric microbiomes or microbial communities – fungi, protozoa and bacteria – that coexist and interact with plants have received increasing attention. This study aimed to evaluate the effect of microbiome enrichment on corn production by the addition of (1) EFANE compost, (2) gongocompost, and (3) the mixture of EFANE compost with gongocompost; or inoculation with (4) liquid inoculant containing the Ab-v5 and Ab-v6 strains of Azospirillum brasilense, and (5) soil sample transplanted from a high fertility area with a history of agroecological management; beyond the untreated control. The experiment was implemented during the summer harvest on 11/14/2022, in an area with a history of agroecological practices in the municipality of Taiobeiras, Minas Gerais. An experimental design in randomized blocks (DBC) consisting of 6 treatments and 6 replications was implemented. The blocks were separated by the marking of the irrigation system. Each plot received 128 seeds, distributed in 32 cradles. The spacing was 0.60 cm between plants and between rows. Shoot heights were carried out biweekly. At 60 days after planting, the number of open leaves, stem diameter and height of the first ear were determined. At the end of the experiment, the number of plants per useful area, the number of ears per cob, the accumulated mass of 100 seeds, the number and accumulated mass of grains per ear were determined. Among the parameters observed, the accumulated mass of 100 seeds demonstrated that the treatments that received the mixture of EFANE compost and gongocompost, only the EFANE compound and the commercial inoculant presented an average of 29.16 g. This value is approximately 5% higher than the control. The average productivity index calculated for these treatments is 13.39 tons per hectare, which corresponds to a value 36.5% higher than the control. On the other hand, inoculation with a soil sample from a high fertility area, despite not having contributed to productivity, promoted greater diameter and length of ears, values similar to the best treatments that led to an increase in productivity. These results suggest that enriching the corn rhizospheric microbiome can be a sustainable alternative practice capable of increasing crop productivity, meeting agricultural needs, as well as enhancing the effect of microbial communities present in the rhizosphere.

COMMITTEE MEMBERS:
Externo à Instituição - JHONATAN MARINS GOULART - UFRRJ
Externa à Instituição - LINDETE MIRIA VIEIRA MARTINS - UNEB
Presidente - ***.536.817-** - NORMA GOUVÊA RUMJANEK - EMBRAPA