Banca de QUALIFICAÇÃO: JOAO VITOR DE NOVOA PINTO

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : JOAO VITOR DE NOVOA PINTO
DATE: 30/07/2021
TIME: 08:00
LOCAL: laboratorio de agrometeorologia (defesa virtual)
TITLE:

PRODUCTIVE CHARACTERISTICS OF THE “TAHITI” ACID LIME IRRIGATED IN THE EDAPHOCLIMATE CONDITIONS OF THE EASTERN AMAZON

KEY WORDS:

Irrigated citrus, Yield, evapotranspiration, efficient water use

PAGES: 40
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Agrometeorologia
SUMMARY:

Brazil is the fifth largest producer of Persian lime in the world. Among the existing citrus species, this is the one with the second largest cultivated area in the country, only surpassed by orange. In the state of Pará – Eastern Amazon, citrus production has been growing in recent years, and Persian lime already occupies 25% of the area cultivated with citrus in the State. In this region, flowering occurs at the end of June and the period of phenological development of fruits extends until mid-November. Harvest season is concentrated from December until April, period where Persian lime reaches the lowest prices in the regional markets. The response of Persian lime irrigated with four different irrigation depths was evaluated in a randomized block design experiment carried out in the edaphoclimatic conditions of Eastern Amazon.  Irrigation leads to an anticipation of the Harvest period, and a general increase in cumulative crop yield during the harvest season 2020-2021, until February. However, water stress caused a second flowering period in mid-October in the plants with the least irrigation depths, what leads to a longer harvest period for this treatment. The coefficient  used on the standard FAO equation to estimate yield reduction as a function of water deficit was fit to the experimental data, based on a relation between relative yield and relative crop evapotranspiration.  () was found. The different irrigation depths also influenced the fresh weight of the harvested fruits, which was higher in the treatment with greater irrigation depth. In the second part of the work, we intend to adjust a model to estimate the actual crop evapotranspiration from remote sensing, calibrated from surface measurements of evapotranspiration and soil moisture. These results will allow real-time yield estimation from remote sensing data and the crop water balance. A third proposal for this thesis is to analyze the water use efficiency in the production of Persian lime and to estimate the economic efficiency and the water pathway of the crop, as well as the sustainability of irrigated Persian lime. In the last chapter, the aim is to do an analysis of ecophysiological responses of Persian lime to different availabilities of water. Stomatal conductance, and photosynthesis rate will be evaluated by means of a infrared Gas Analyzer (IRGA), following the same experimental design.

BANKING MEMBERS:
Presidente - 1356961 - PAULO JORGE DE OLIVEIRA PONTE DE SOUZA
Externo à Instituição - ANTONIO HÉLDER RODRIGUES SAMPAIO - IFBaiano
Externo à Instituição - GLAUCO DE SOUZA ROLIM - UNESP
Externo à Instituição - SAMUEL ORTEGA FARIAS - UTALCA