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Publicação
Aplicação da espectroscopia de infravermelho próximo na avaliação de alguns atributos de qualidade em pêra Rocha e maçã Gala
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Orientador(es)
Resumo(s)
Firmness, soluble solids content (SSC) and dry matter (DM) were assessed in pear ‘Rocha’ and
‘Gala’ apple through the performance of calibration equations by the comparison between the values
of quality attributes obtained with destructive methods and the values predicted by the
spectrophotometer NIR CASE (NIRS). Measurements were done in 750 ‘Rocha’ pears and 450 ‘Gala’
apples. These fruits were from different growers, orchards, picking date, stages of maturation and
storage conditions. The model for ‘Rocha’ pear gave good prediction for SSC (r2 = 0,87; SEP = 0,56
ºBrix; ME = 0,86) and excellent prediction for DM (r2 = 0,96; SEP = 0,29 %; ME = 0,94). For firmness
the model wasn’t suitable (r2 = 0,16; SEP = 8,83 N; ME = -1,09). For ‘Gala’ apple the model gave good
results for SSC (r2 = 0,77; SEP = 0,47 ºBrix; ME = 0,69) but for firmness the model wasn’t
appropriated (r2 = 0,10; SEP = 9,97 N; ME = -3,25). The results show that NIR CASE can be used to
predict SSC and DM in pear and SSC in apple. NIR CASE values for firmness do not correlate with
those measured with the penetrometer.
Descrição
Mestrado em Engenharia Agronómica - Hortofruticultura e Viticultura - Instituto Superior de Agronomia
Palavras-chave
pear apple non destructive methods near infrared spectroscopy quality pera Rocha maça métodos não destrutivos qualidade