Banca de DEFESA: GIÓRGIA SÁTIRO DE MOURA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : GIÓRGIA SÁTIRO DE MOURA
DATE: 28/05/2024
TIME: 09:00
LOCAL: Ambiente Virtual
TITLE:

Anthropic contribution and nitrogen and phosphorus balances in mangrove soils in the Botafogo River estuary - PE

KEY WORDS:

Eutrophication, nitrogen fertilization, phosphate fertilization

PAGES: 60
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Ciência do Solo
SPECIALTY: Química do Solo
SUMMARY:

The Botafogo river basin is an important source of water for the population and industries north coast of Pernambuco. However, the discharge of loaded anthropogenic effluents nitrogen (N) and phosphorus (P) directly in estuarine waters and soils poses serious risks eutrophication. The availability of these nutrients is regulated by their forms of stabilization in soil. These forms play a crucial role in the mobility of nutrients in the soil and its exchange with the underlying water. The aim of this study was to evaluate the contribution and stability of phosphorus and nitrogen in mangroves based on activities near the estuary of the Botafogo River. Chemical and physical analyzes were performed to characterize the soils and determine the total nitrogen and phosphorus content, as well as the fractionation of phosphorus. The results indicate a higher nitrogen supply related to activities of shrimp farming and higher phosphorus input from sugarcane cultivation.

Inorganic fractions such as P-Ext, F-Fe, P-Al and P-Ca may be more or less available depending on the soil pH, while the availability of the P-Ha fraction can increase based changes in redox potential (Eh) and soil organic matter stability. The mangroves are considered nutrient sinks and store sediments in a efficient. However, its accumulation capacity can be reduced due to impacts environmental. Therefore, finding solutions for conflicting uses of this ecosystem is crucial to identify conservation and management priorities.

COMMITTEE MEMBERS:
Presidente - CAROLINE MIRANDA BIONDI
Interna - ***.055.504-** - ANA DOLORES SANTIAGO DE FREITAS - UFRPE
Interno - YGOR JACQUES AGRA BEZERRA DA SILVA
Externo ao Programa - ***.952.028-** - FELIPE JOSÉ CURY FRACETTO - USP