Banca de DEFESA: MARIA FERNANDA DE ALBUQUERQUE TENÓRIO ALVES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MARIA FERNANDA DE ALBUQUERQUE TENÓRIO ALVES
DATE: 30/07/2024
TIME: 09:00
LOCAL: Google Meet
TITLE:

CARBON SEQUESTRATION AND WATER USE EFFICIENCY IN FORAGE PALM CULTIVATED IN THE AGREST OF PERNAMBUCO

KEY WORDS:

Eddy covariance, evapotranspiration, WUE, Opuntia cochenillifera, semiarid, carbon sequestration

PAGES: 63
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Agrometeorologia
SUMMARY:

The Brazilian semi-arid region is one of the region’s most facing the effects of climate change, which puts the maintenance of ecosystems and agricultural production at risk. Changes in the use and occupation of edaphoclimatic resources alter atmospheric dynamics and disrupt net energy exchanges between the soil and the atmosphere. Some plant species adapted to the semi-arid region can be promising alternatives for mitigating the effects of climate change, an example of this is the forage palm (Opuntia cochenillifera), which is a xerophytic species due to its morphology and physiology, in addition to showing high tolerance to environments with periods of intense drought. Several studies have been carried out to measure the flows of water, energy and CO₂ in agroecosystems and ecosystems in Brazil and around the world, with the aim of determining whether carbon emissions or sequestration are occurring. However, there is still little research on the dynamics of these flows in cactus pear. Therefore, this study aimed to evaluate evapotranspiration, energy and CO₂ flows in cactus pear. For this purpose, a micrometereological tower was installed in a cactus production area in São Bento do Una – PE. This tower is equipped with a three-dimensional sonic anemometer and a CO₂ and H₂O analyzer, obtaining values for CO₂ fluxes, net radiation (Rn) and latent heat (LE) and sensible heat (H) fluxes, in addition to evapotranspiration (ET), through the eddy covariance methodology. Water use efficiency (WUE) and cactus cactus productivity were also measured. From the results, it was found that H was higher than LE, which indicates that the more energy was used in air heating. The WUE grew at the same time as net palm productivity. The palm acted most of the time sequestering atmospheric carbon, with an average carbon sequestration of 3.87 t. ha^-1. Due to its great suitability for soil types and its high resistance to water stress, the palm stands out as an important production option in the range of forage plants and an alternative under climate change scenarios in view of its preservation and its imminent integration potential to the market for carbon credits and environmental services provided to society.

 

COMMITTEE MEMBERS:
Presidente - JOSE ROMUALDO DE SOUSA LIMA
Externo à Instituição - ANTONIO CELSO DANTAS ANTONINO - UFPE
Externa à Instituição - MARIA CAMILA DE BARROS SILVA