Banca de DEFESA: ARIANE SILVA PEREIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ARIANE SILVA PEREIRA
DATE: 12/03/2025
TIME: 09:00
LOCAL: Prédio Prof. Mateus Rosas Ribeiro
TITLE:

Microbial inoculants and biochar as sustainable alternatives for corn cultivation

 

KEY WORDS:

Phosphorus. Rhizophagus clarus. Plant growth promotion. Zea mays.

PAGES: 33
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUMMARY:

Corn (Zea mays L.) is widely cultivated in Brazil, with its production reaching over 130 million tons in 2023. However, this high productivity requires intensive use of fertilizers and irrigation. A solution to reduce fertilizer dependency and its negative impacts is the inoculation of microorganisms, such as arbuscular mycorrhizal fungi (AMF) and phosphate-solubilizing bacteria (PSB), as well as the addition of biochar, which can enhance the activity of these microorganisms in soil. Thus, this study hypothesizes were: (I) PSB inoculation increases P bioavailability in maize cultivation under greenhouse conditions; (II) AMF inoculation enhances phosphorus uptake in maize; and (III) the application of sewage sludge biochar to the cultivation substrate has positive effects on maize development. The study aims to evaluate the effect of co-inoculation of AMF and PSB, along with the addition of sewage sludge biochar to the plant-growing substrate. The experiment was conducted in a greenhouse at the Federal Rural University of Pernambuco, using a completely randomized experimental design with a factorial arrangement, comprising eight inoculation treatments and two doses of biochar, with four replications. After 62 days, the experiment was collected, and soil, aerial plant parts, and roots were stored. Plant growth parameters, nutrient content in plants and soil, enzymatic activity, and microbiological aspects such as mycorrhizal colonization, microbial biomass carbon and phosphorus, and basal respiration were evaluated. The results partially supported the hypothesis that the co-inoculation of AMF and PSB promotes growth and nutrient absorption, as the co-inoculation resulted in higher mycorrhizal colonization rates and increased nitrogen absorption, but did not promote higher phosphorus accumulation in the plant. Moreover, biochar had a negative effect on AM development and the production of glomalin-related soil proteins, despite promoting higher carbon in the microbial biomass in soils with B. cereus and AMF.

COMMITTEE MEMBERS:
Externa à Instituição - CÍNTIA CAROLINE GOUVEIA DA SILVA
Interna - GISELLE GOMES MONTEIRO FRACETTO
Interno - MARIO DE ANDRADE LIRA JUNIOR