Banca de DEFESA: ELISIANE MARTINS DE LIMA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : ELISIANE MARTINS DE LIMA
DATE: 26/03/2025
TIME: 08:00
LOCAL: meet
TITLE:

Development of a product based on biochar and Trichoderma spp. derived from and applied in the grape production system.

KEY WORDS:

Soil Microbiome. Soil Enzymes. Soil Quality. Vitis vinifera

PAGES: 84
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Ciência do Solo
SPECIALTY: Microbiologia e Bioquímica do Solo
SUMMARY:

Population growth has increased the demand for food, generating large volumes of agricultural and agro-industrial waste. The sustainable management of this waste represents a challenge for the implementation of more efficient and sustainable agricultural practices. On the other hand, the reuse of this waste, especially in the form of biochar—a carbon-rich product resulting from the pyrolysis of organic residues—can enhance soil properties and reduce environmental impacts. Although biochar stands out for its versatility in agricultural and environmental systems, its interaction with soil microorganisms, particularly with the Trichoderma genus, still needs to be better understood. Fungi of the Trichoderma genus are widely recognized for their efficiency in the biological control of phytopathogens and their role as plant growth promoters. However, studies addressing the interaction between biochar and Trichoderma are still scarce, requiring further investigation to understand their impact on soil microbiota. To bridge this gap, this study aimed to evaluate the effects of biochar produced from grape pomace and grape fermentation residues—generated after wine production—applied in combination with Trichoderma aureoviride URM 5158 and Trichoderma hamatum URM 6656 in soils cultivated with grapevines of the Cabernet Sauvignon and Malbec varieties. The experiments were conducted in a randomized block design with nine treatments and three replications. Soil chemical and microbiological attributes, as well as grapevine productivity, were evaluated. The results demonstrated that the application of biochar and Trichoderma in soil cultivated with Cabernet Sauvignon grapes led to significant changes in the structure and diversity of microbial communities. Interestingly, soil chemical variables such as pH, Na⁺, and K⁺, attributed to biochar inputs, played a modulatory role in shaping microbial community structure, favoring certain groups over others. At the phylum level, fungal communities were predominantly composed of Ascomycota, Basidiomycota, Chytridiomycota, and Glomeromycota, phyla essential for organic matter decomposition and nutrient cycling. On the other hand, when evaluating the effects of biochar and Trichoderma application on soil chemical and enzymatic attributes in Malbec grapevines, our results revealed that both treatments significantly altered soil properties. The greatest increases were observed with the co-application of grape fermentation biochar (GFB) and T. hamatum (GFB+Th), resulting in substantial increases of 569.23% in microbial biomass carbon (MBC), 60.73% in total organic carbon (TOC), and 86.70% in potassium (K) content. Additionally, the isolated application of GFB biochar increased acid phosphatase activity by 38.76%, while its co-application with T. hamatum enhanced β-glucosidase activity by 56.46%. These findings are particularly relevant for viticulture, as they indicate that the combined use of biochar and Trichoderma can be an effective strategy to improve soil health by promoting microbial balance and nutrient availability.

COMMITTEE MEMBERS:
Interna - ERIKA VALENTE DE MEDEIROS
Externo à Instituição - CARLOS ALBERTO FRAGOSO DE SOUZA - UFPE
Externo à Instituição - CLAUDE HAMMECKER
Externa à Instituição - JAMILLY ALVES DE BARROS
Externo à Instituição - JOSE ROMUALDO DE SOUSA LIMA