Banca de DEFESA: RENATO LUIS TERTULIANO DE GOIS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : RENATO LUIS TERTULIANO DE GOIS
DATE: 11/09/2023
TIME: 10:00
LOCAL: Google Meet
TITLE:

Characterization of organic matter from termite mounds in the agreste region of Alagoas state: prospects for agricultural application. 

KEY WORDS:

termite mounds; organic matter; mounds; humic substances.

PAGES: 70
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUMMARY:

Termites, considered pests in some societies, may represent a source of nutrients for agricultural application, due to the presence of organic matter derived from the action of organisms decomposers. The soil, type of vegetation and organisms directly influence the characteristics of this material. In this sense, the present work aimed to extract and characterize the organic matter

present in mounds of pasture termite mounds in two cities in the rural area of Alagoas, São Sebastião and Great Fair. Studies were carried out on the physical-chemical composition of the soil that makes up the mounds of the termite mounds. The analyzes consisted of determining the pH in water, the organic matter of the samples was determined by the calcination method. The organic matter content was significant in all samples, highlighting the termite mound soils of São Sebastião (12.8%) and the termite mound of Feira Grande (9.15%), which showed higher average organic matter content when compared to the other soil samples. What directly influenced the increase in cation exchange capacity. The micro, macronutrients and species Metallic concentrations were determined in soil samples by plasma atomic emission spectroscopy. microwave induced (MP-AES) and physical attributes (soil texture, soil bulk density, particles, total porosity) and the extraction of humic substances occurred by the method adopted by International Society of Humic Substances (IHSS). The characterization of samples of substances humic samples was carried out by ultraviolet spectroscopy in the visible region and spectroscopy in the Fourier Transform Infrared – FTIR. Absorbance readings were taken at 270nm, 407nm, 465nm and 665nm, through the E4/E6 ratio, the E2/E4 ratio. It showed that humic substances showed humification aromatic characteristics, the E2/E4 ratio indicated the presence of structures porphyrins in the samples of humic substances studied. Therefore, the present research becomes relevant in order to obtain a more in-depth knowledge about the organic matter of mounds of termite mounds in pastures in the wild of Alagoas for agricultural application, mainly in regions subject to desertification like the Alagoas wild.

COMMITTEE MEMBERS:
Externo(a) à Instituição - DANIELLE GOVEIA
Interno(a) - 1127609 - DIOGENES MENESES DOS SANTOS
Presidente - 1697766 - WANDER GUSTAVO BOTERO