Banca de QUALIFICAÇÃO: LUÍS PAULO ALVES PORTUGAL

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : LUÍS PAULO ALVES PORTUGAL
DATE: 30/08/2024
TIME: 08:00
LOCAL: Altamira
TITLE:

EFFECT OF WATER USE AND THERMAL REGIME ON THE MATURATION TIME OF COCOA TREE (Theobroma Cacao L.) IN THE TRANSAMAZONA AND XINGU REGION

KEY WORDS:

Theobroma-Cacao, Degree-days, Thermal Time, Basal Temperature

PAGES: 31
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Agrometeorologia
SUMMARY:

The growing demand for chocolate, especially in Europe, drove the expansion of cocoa production in different regions of Brazil. However, the lack of technical cocoa policies in the past has highlighted the need to understand the thermal demands of the crop and the need to use water to ensure its long-term sustainability and profitability. Considering the economic importance of cocoa farming in the state of Pará, where official data from 2020 indicates a cocoa harvested area of approximately 150,000 hectares, and production of almost 150,000 tons of almonds, resulting in an average productivity close to 1 ton per hectare. This research raises the hypothesis that variation in temperature and lack of water directly affect the maturation process of cocoa fruits, influencing both the productivity and quality of the beans. In this sense, the objective of this study is to evaluate the contribution of water use to the thermal regime in the cocoa tree, in terms of degree days and the thermal time between fertilization and ripe fruit. To do this, define the thermal sum of the different phenological stages of Cocoa Farming, determine the upper and lower basal temperatures through phenological monitoring of cocoa trees in Transamazônica and Xingu and discuss the effects of agriculture on phenology and productivity. The study is being carried out on a commercial cocoa plantation property combined with açaí in a total area of 10 hectares, located on Rodovia BR 230 - Rodovia Transamazônica. For ametric measurement of rainfall, meteorological sensors were used to monitor rainfall occurrence (TB4, Hydrological Services, Sydney, NSW, Australia), incident solar radiation (CMP6-L, Campbell Scientific Instrument, Logan, UT, USA). Temperature and relative humidity (HTP201 Humidity and temperature probe with analog outputs). The results of this research are expected to provide information for cocoa producers in the region, contributing to the development of more efficient and sustainable management practices.

COMMITTEE MEMBERS:
Presidente - 1356961 - PAULO JORGE DE OLIVEIRA PONTE DE SOUZA
Externo ao Programa - 2666418 - MARCUS JOSE ALVES DE LIMA - UFRAExterno à Instituição - HILDO GIUSEPPE GARCIA CALDAS NUNES - SEMAS
Externa à Instituição - SANDRA ANDREA SANTOS DA SILVA - UFPA