Banca de QUALIFICAÇÃO: JOYCILENE TEIXEIRA DO NASCIMENTO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : JOYCILENE TEIXEIRA DO NASCIMENTO
DATA : 22/11/2019
HORA: 09:00
LOCAL: Auditório da Pós-graduação em Agronomia
TÍTULO:

PRODUCTION OF NET MELON (Cucumis melo L.) SUBMITTED TO DIFFERENT SOIL WATER TENSIONS AND POTASSIC FERTILIZATION IN NORTHEAST  PARÁ.

PALAVRAS-CHAVES:

Cucumis melo L. tensiometry, fertigation, protected cultivation, fruit production.

PÁGINAS: 56
GRANDE ÁREA: Ciências Agrárias
ÁREA: Engenharia Agrícola
SUBÁREA: Engenharia de Água e Solo
ESPECIALIDADE: Irrigação e Drenagem
RESUMO:

Amid the various varieties of melon, the net melon has gained prominence in the market competitively because it is a better looking melon with peel and pulp color, aroma, texture, firmness and sweetness. The objective of this work was to evaluate the behavior of the melon in a protected environment, subjected to different soil water stresses and potassium doses applied via fertigation, focused on the climatic conditions of the northeast Pará mesoregion. The experiment was conducted between April and August 2019 at the School of Igarapé-Açu (FEIGA), UFRA, located in the municipality of Igarapé-Açu - PA. The soil of the region consists of a dystrophic yellow argisol of medium sandy texture. The experimental design was a randomized complete block design (DBC), in a 4 x 5 factorial scheme, with 20 treatments and three replications, totaling 60 experimental plots, consisting of five percentage doses of potassium (0, 50, 100, 150 and 200%) of the recommended dose for culture, which corresponded to 0, 123.84, 247.68, 371.52 and 495.36 kg ha^-1 of K₂O respectively and four soil water stresses (15, 30, 45 and 60 kpa) used as an indication of when to irrigate the critical voltage. The variables analyzed were: fruit weight (kg plant^-1), transversal and longitudinal diameter of the fruits (mm), pulp thickness (mm), ° Brix (%) and pH. Significant effect was observed for potassium dose and soil water tension (K x T) interactions, only for pulp thickness (EP), ° Brix and fruit cross diameter, obtaining a better index in the combination of 100% K₂O and soil tension. 37.73 kPa (42.80 mm), 100% (9.5%) and 150% (9.5%) with voltage of 24.67 KPa respectively, showing no difference between both and 43.8 kPa and potassium dose and 100%  (128.88 mm), respectively For fruit weight and longitudinal diameter the best results were obtained when irrigation was performed at 15 kPa tension, with 1.54 kg of plant^-1 fruit and 127.7 mm, respectively. Significant quadratic effect was observed for potassium doses, with larger longitudinal diameter (127, 506 mm) and fruit weight (1.70 kg plant^-1), at 94% and 103%, respectively, of the recommended fertilization potassium. The tension of 15 Kpa presents better results of fruit weight and longitudinal diameter of the fruit under the conditions of the study. Potassium fertilization via irrigation water affects the fruit weight and longitudinal diameter. The interaction potassium doses and soil water stress affect the ° Brix, pulp thickness and longitudinal diameter of the fruits. Soil water stress and potassium dose showed no significant effect on the pH of the melon fruit pulp.

MEMBROS DA BANCA:
Interno - 2747716 - JOAQUIM ALVES DE LIMA JUNIOR
Externo ao Programa - 1521789 - RODRIGO OTAVIO RODRIGUES DE MELO SOUZA
Externo ao Programa - 2078696 - DANILO MESQUITA MELO
Externo à Instituição - PATRÍCIA RIBEIRO MAIA - UFPA