Banca de DEFESA: ANA LUA TELLES LIMA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ANA LUA TELLES LIMA
DATE: 30/08/2024
TIME: 09:00
LOCAL: meet.google.com/whi- pumv-owa
TITLE:

Agricultural management practices and their relationships with soil attributes under sugarcanecultivation

KEY WORDS:

Coastal Tablelands; Vinasse; Beerkan; Mechanization; Compaction.

PAGES: 77
BIG AREA: Engenharias
AREA: Engenharia Sanitária
SUMMARY:

The sugarcane cultivation, one of the main agricultural products in Brazil, has great socio economic importance, especially in the state of Alagoas. Soil management is crucial for agricultural sustainability and productivity, directly impacting soil attributes. In this context, the objective of the research was to analyze the effects of agricultural management practices on the soil attributes under sugarcane cultivation. The research was carried out in areas in the Coastal Tablelands region of Alagoas, with different times of vinasse application and harvesting practices (manual and mechanized). To this end, four profiles were opened: P1, under sugarcane cultivation, with vinasse application for 80 years, and mechanized harvesting; P2, sugarcane cultivation, with application of vinasse for one year, and mechanized harvesting; P3, sugarcane cultivation, without application of vinasse, and manual harvesting; P4, native forest. In each profile, in the first four horizons, six undeformed samples were collected via volumetric core (≅100 cm3), in addition to deformed samples. In cores samples, the following attributes were determined: Ksat; total porosity and pore classes; retention curve; available water; soil bulk density. The deformed samples (TFSA) were used for the physical (particle size analysis, particle density) and chemical (pH, assortative complex, cation exchange capacity - CEC, OM) characterization of the soils. During sampling, infiltration tests were also carried out via Beerkan. Chemical analyzes reveal that the soils in areas cultivated with vinasse application (P1 and P2) have higher levels of fertility, with high levels of potassium and phosphorus, in addition to high CEC. Liming contributed to neutralizing soil acidity and reducing aluminum saturation, improving the availability of essential nutrients. Physical analysis indicated that cultivated soils have a more compacted structure, especially in profiles subjected to mechanized harvesting (P1 and P2), which can affect porosity and water infiltration. In these profiles, soil compaction, resulting from heavy machinery traffic, is more evident in the first horizons, negatively impacting Ksat and water storage capacity. The Ksat, determined by laboratory and field tests (Beerkan), was significantly lower in the areas under cultivation compared to the forest. Sustainable management practices are essential to maintain the long-term viability of sugarcane cultivation areas, promoting soil conservation and maintaining productivity. These findings provide a solid basis for agricultural management recommendations that balance productivity with environmental sustainability, highlighting the importance of integrated strategies that consider soil conservation and efficiency in the use of inputs.

COMMITTEE MEMBERS:
Presidente - BRIVALDO GOMES DE ALMEIDA
Interno - MARCUS METRI CORREA
Externo à Instituição - WAGNER LUÍS DA SILVA SOUZA - IFPE