Banca de DEFESA: MARINA BEATRIZ DA SILVA BEZERRA SANTOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MARINA BEATRIZ DA SILVA BEZERRA SANTOS
DATE: 28/06/2024
TIME: 13:00
LOCAL: Sala Virtual - Google Meet
TITLE:

Methods of applying pyroligneous extract to initial growth of Handroanthus impetiginosus seedlings

KEY WORDS:

biochar, forest seedling quality, seedling production, vigor

PAGES: 52
BIG AREA: Ciências Agrárias
AREA: Recursos Florestais e Engenharia Florestal
SUBÁREA: Silvicultura
SPECIALTY: Sementes Florestais
SUMMARY:

The exploration of new approaches for utilizing resources from forest ecosystems is important for optimizing the forestry sector. In this context, the present study aimed to evaluate different methods of applying wood vinegar (EP) on the initial growth of Handroanthus impetiginosus seedlings. The investigation involved incorporating EP into the substrate in different proportions of biochar (B) + commercial substrate (S) and biochar enriched with wood vinegar (BP) + commercial substrate (S), specifically in the proportions of 20%B + 80%S (BS20), 20%BP + 80%S (BPS20), 30%B + 70%S (BS30), and 30%BP + 70%S (BPS30). A second trial was conducted after seedling emergence, in which EP was applied at concentrations of 0, 0.2, 0.4, and 0.6%, using two methods: direct application to the substrate and foliar spray. Seedlings were evaluated at 30, 60, 90, and 120 days after sowing, measuring height, stem diameter, and leaf number. At 120 days after sowing, seedlings were sectioned and dried in an oven to determine dry mass and Dickson's quality index (IQD). Regression analysis and analysis of variance were performed using the collected data. The results indicated that the methods of applying EP influenced the initial growth of the seedlings. Notably, incorporating EP into the substrate resulted in inferior performance in height and the ratio between shoot dry mass and root dry mass. On the other hand, applying EP after seedling emergence, either through direct application to the substrate or foliar spray, increased seedling height at all tested concentrations, differing only from the control treatment. Root dry mass, total dry mass, and IQD showed significant differences in the interaction between the application method and EP concentrations.

COMMITTEE MEMBERS:
Presidente - 1721230 - MAURO VASCONCELOS PACHECO
Externo à Instituição - FERNANDO DOS SANTOS ARAÚJO - UFAPE
Externo à Instituição - FRANCIVAL CARDOSO FELIX - UFRPE