Banca de DEFESA: BRENO SALES DO NASCIMENTO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : BRENO SALES DO NASCIMENTO
DATE: 29/05/2026
TIME: 15:00
LOCAL: sala de aula do PPGCAP
TITLE:

INTEGRATION OF BIOINPUTS IN SEED MICROBIOLIZATION AS A STRATEGY FOR THE SUSTAINABLE INTENSIFICATION OF FORAGE GRASSES

KEY WORDS:

Biochar, biofertilization, Forage sorghum, Plant growth-promoting bacteria, Sustainable agriculture.

PAGES: 92
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUBÁREA: Pastagem e Forragicultura
SUMMARY:

The intensification of agricultural production based on the excessive use of chemical fertilizers has generated significant environmental impacts, thereby increasing the demand for more sustainable strategies. In this context, the use of bioinputs based on plant growth-promoting bacteria (PGPB) and biochar has emerged as a promising alternative for forage grass production. This study aimed to evaluate the effect of seed microbiolization in forage sorghum (Sorghum bicolor (L.) Moench) through inoculation and co-inoculation of PGPB associated with biochar pelleting on seed germination, morphophysiology, biomass production, and plant morphogenesis. In addition, the study sought to develop a modified culture medium supplemented with L-tryptophan and magnesium sulfate (MgSO4) to induce metabolic pathways in bacterial strains and stimulate greater production of indoleacetic acid, phosphate solubilization, and biological nitrogen fixation, thereby enhancing crop performance. Experiments were conducted under germination chamber, greenhouse, and field conditions using Rhizobium cauense and Burkholderia heleia strains, applied either individually or in co-inoculation, associated or not with biochar pelleting and different nitrogen fertilization levels. Germinative, morphophysiological, productive, and morphogenetic traits of forage sorghum were evaluated. Overall, biological treatments (inoculation, co-inoculation, pelleting, or their association) promoted significant improvements in crop performance. The integration between PGPB and biochar increased plant height by up to 35.57%, leaf area by 21.78%, total green biomass by 120.77%, and total dry biomass by 68.28% compared to the control treatment, in addition to expressive increases in chlorophyll contents. In comparison with conventional nitrogen fertilization, biological treatments showed similar or superior performance for several evaluated parameters. The results highlight the functional complementarity of the bacterial strains and their synergistic interaction with the pelleting material. Furthermore, the modified inoculant formulation promoted improvements in vegetative and productive traits, indicating greater bacterial metabolic efficiency and enhancement of plant growth-promoting mechanisms. Overall, the findings demonstrate that the integration of seed microbiolization, PGPB, biochar, and bioactive formulations represents a promising strategy for the sustainable intensification of forage grass production.

COMMITTEE MEMBERS:
Presidente - 1086602 - JOAO TIAGO CORREIA OLIVEIRA
Externo à Instituição - DANIEL BEZERRA DO NASCIMENTO - UFAPE
Externo à Instituição - CAIO CESAR GOMES FREITAS