Banca de QUALIFICAÇÃO: HELANE CRISTINA AGUIAR SANTOS

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : HELANE CRISTINA AGUIAR SANTOS
DATA : 19/12/2018
HORA: 09:00
LOCAL: UFRA - Campus Belém - Prédio de Solos - Sala A
TÍTULO:

PRODUCTION YIELD OF FERTIRRIGATED BELL PEPPER WITH NITROGEN DOSES AND SUBMITTED TO WATER TENSIONS 

IN THE SOIL

PALAVRAS-CHAVES:

Nitrogen fertilization, Green house, drip irrigation, tensiometry

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

The bell pepper is one of the most important vegetables in Brazil and in the world, because it
presents advantages such as water efficiency, greater production and greater product quality,
the bell pepper can be found the whole year and better use of production factors. This paper
aims to study the effect of different soil water stresses and nitrogen doses via fertirrigation in
the cultivation of bell pepper in a greenhouse in the State of Pará, Brazil. The experiment was
conducted in a greenhouse at Fazenda Escola de Igarapé-açu - UFRA. The hybrid product
used was DAHRA RX in the spacing 1.0 m between rows and 0.50 m between plants, using
the experimental design of randomized blocks in a 5x4 factorial scheme with three replicates.
Each plot had a dimension of 3.5 m in length and 0.20 m in width (0.7 m²), totaling 7 plants
per row, considering the five central plants being useful. The treatments consisted of five soil
water stresses (15, 25, 35, 45 and 65 kPa) as indicative of the irrigation moment (critical
stress), using drip irrigation, and four nitrogen doses (0, 135, 265 and 395 kg ha-1). The plant
height (PH), fresh and dry shoot mass (FSM and DSM) there was only significant difference
for two nitrogen doses, respectively 77.65 cm; 1,151.49 g and 177.15 g corresponding to
doses 224.33; 256.09 and 233.33 kg ha-1 of nitrogen. For dry mass of commercial fruits
(DMCFr) it present an ideal tension of 11.20 kPa to 79.46 g of fruits, and 237.86 kg ha-1 of
nitrogen for 74.19 g of fruits, however for ΨAm it get the -0.51 MPa for a tension 39 , 84 kPa
and 350 kg ha-1 of nitrogen to -0.39 MPa. The number of commercial fruits (NCFr), length
and diameter of the fruit (LFr and DFr) showed significant difference only for soil water
stresses, respectively, with 16.48 fruits, 90 and 47.57 mm, respectively, corresponding to the
strains 31.72 ; 32.58 and 35.34 kPa. There was interaction between the factors soil water
tension and nitrogen rates for the commercial fresh fruit mass (CFFrM), Yield data
representation (PROD) and water use efficiency (WUE), where the best indexes were
obtained with the combination of 35 kPa and 265 kg ha-1 of nitrogen, reaching 1,966.47 kg of
fruits, 17,206.58 kg ha-1 and 24.45 kg ha-1 mm-1, respectively.

MEMBROS DA BANCA:
Presidente - 2747716 - JOAQUIM ALVES DE LIMA JUNIOR
Interno - 1356961 - PAULO JORGE DE OLIVEIRA PONTE DE SOUZA
Externo ao Programa - 2143334 - RAFAELLE FAZZI GOMES
Externo à Instituição - EDUARDO CEZAR MEDEIROS SALDANHA - UFRA