Aplicação de técnicas pré e pós-colheita em tangerina ‘Dekopon’
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2019-02-11
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Universidade Federal de Goiás
Resumo
The 'Dekopon' tangerine is a little known fruit in the consuming community, and emerging in
research, nevertheless gains space within the citrus culture for its agronomic and sensorial
characteristics, opening market for mandarins. The objective of the present work was to evaluate
the application of calcium chloride in pre-harvest and post-harvest of 'Dekopon' tangerine, with
associations of processing, refrigeration, passive modified atmosphere and ultraviolet radiation C.
The study was carried out in a commercial orchard and the fruits analyzed in the laboratory. For
the pre-harvest treatments, different doses of calcium chloride (100, 200, 300 and 400% of the
recommended dosage) were used for the post-harvest, the association with UVC radiation was used
(control and 10 minutes of exposure), processing (presence and absence of processing) and passive
modified atmosphere (control, PVC and LDPE); and thereafter, all UVC radiation times (0, 3, 6
and 9 minutes) and refrigeration (24, 12 and 6 ° C). Loss of fresh mass, color (ºHue and chroma),
soluble solids, hydrogenation potential (pH), titratable acidity, ripeness index, geometric
characteristics, ascorbic acid, firmness and fruit fractions were evaluated. The data originated from
the quantitative variables analyzed were submitted to regression analysis by means of an F test at
the 5% probability level to measure the meaning of the proposed model, while the data originated
from the analyzed qualitative variables were submitted to analysis of variance (P <0.05), and when
significant the Scott-Knott averages comparison test was done at 5% probability. Based on the
results, it was concluded that the use of pre-harvest calcium chloride, for most variables, desirable
post-harvest characteristics were observed for 100 and 200% of the recommended CaCl2 dosage
during 21 days of evaluation . While the beneficiation did not act in a beneficial way, but the
association between ultraviolet light and passive modified atmosphere, they acted to maintain postharvest
attributes at room temperature. And, refrigerated storage at 12ºC allowed for the
maintenance of desirable post-harvest characteristics, allowing the fruit to be preserved for a longer
period, physical and physicochemical quality with higher stability, and longer shelf life associated
with this storage the UVC radiation time of 3 minutes, showing promise in the maintenance of
adequate post-harvest quality.
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VASCONCELOS, L. H. C. Aplicação de técnicas pré e pós-colheita em tangerina ‘Dekopon’. 2019. 152 f. Tese (Doutorado em Agronomia) - Universidade Federal de Goiás, Goiânia, 2019.