Banca de DEFESA: ERMANO PREVOIR

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : ERMANO PREVOIR
DATE: 18/12/2024
TIME: 09:00
LOCAL: Sala Virtual – Google meet
TITLE:

EFFECT OF IRRIGATION AND FERTIGATION ON THE PRODUCTION OF GREEN DWARF COCONUT IN THE AMAZON

KEY WORDS:

Cocos nucifera L., Plant nutrition. Phenology. Coconut water quality. Amazon.

PAGES: 76
BIG AREA: Ciências Agrárias
AREA: Engenharia Agrícola
SUBÁREA: Engenharia de Água e Solo
SPECIALTY: Irrigação e Drenagem
SUMMARY:

In recent years, Brazil has significantly expanded the cultivation of green dwarf coconut (Cocos nucifera L.) under irrigation, driven by the increasing demand for coconut water and the establishment of processing industries. Despite the favorable tropical conditions, challenges such as rainfall seasonality and climatic variability in the Amazon justify the adoption of irrigation and fertigation technologies to enhance crop productivity and quality. This study was conducted at Fazenda Reunidas Sococo, in Santa Izabel do Pará, using a randomized block design (3 x 4). The efficiency of different levels of NPK+Mg fertilization (100%, 200%, and 300%) and four soil water tensions (15, 30, 45, and 60 kPa) was evaluated in terms of productivity and coconut water quality. Variables assessed included foliar nutrient concentrations (N, P, K, and Mg), production metrics, and coconut water quality indicators. The results revealed that lower soil water tensions (15 kPa and 30 kPa) combined with higher fertigation levels (200% and 300%) significantly increased productivity, reflected in higher numbers of fruits per plant (NFP), fruit weight (PF), and water volume (VA). Additionally, coconut water quality was optimized, with notable improvements in soluble solids content (Brix) and balanced acidity (ATT) and electrical conductivity. Regarding foliar nutrients, higher concentrations of N and K were observed in treatments with 200% and 300% fertilization, particularly under soil water tensions of 15 kPa and 30 kPa, whereas P and Mg exhibited better performance under moderate tensions (30 kPa and 45 kPa). At higher tensions (45 kPa and 60 kPa), nutrient absorption was reduced, indicating water stress in the plants.

COMMITTEE MEMBERS:
Presidente - 2747716 - JOAQUIM ALVES DE LIMA JUNIOR
Externo ao Programa - 1521789 - RODRIGO OTAVIO RODRIGUES DE MELO SOUZA - UFRAExterno à Instituição - ANDRE LUIZ PEREIRA DA SILVA
Externo à Instituição - ITALO MARLONE GOMES SAMPAIO
Externa à Instituição - MARIANA CASARI PARREIRA
Externo à Instituição - PAULO MANOEL PONTES LINS