Journal of
Stored Products and Postharvest Research

  • Abbreviation: J. Stored Prod. Postharvest Res.
  • Language: English
  • ISSN: 2141-6567
  • DOI: 10.5897/JSPPR
  • Start Year: 2010
  • Published Articles: 147

Full Length Research Paper

Application of NIR-Spectroscopy to predict the harvesting maturity, fruit ripening and storage ability of Ca-chitosan treated baby kiwifruit

J. G. Kim
  • J. G. Kim
  • Department of Horticulture, College of Agriculture and Life Sciences, Gyeongsang National University, Jinju 52828, Korea.
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Y. Park
  • Y. Park
  • Division of Special-Purpose Trees, Korea Research Institute, Suwon 16632, Korea.
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M. H. Shin
  • M. H. Shin
  • Department of Horticulture, College of Agriculture and Life Sciences, Gyeongsang National University, Jinju 52828, Korea.
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S. Muneer
  • S. Muneer
  • Department of Horticulture, College of Agriculture and Life Sciences, Gyeongsang National University, Jinju 52828, Korea.
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R. Lerud
  • R. Lerud
  • Felix Instruments, 1554 NE 3rd Avenue, Camas, WA, 98607, USA.
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C. Michelson
  • C. Michelson
  • Felix Instruments, 1554 NE 3rd Avenue, Camas, WA, 98607, USA.
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D. Il Kang
  • D. Il Kang
  • Department of Horticulture, College of Agriculture and Life Sciences, Gyeongsang National University, Jinju 52828, Korea.
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J. H. Min
  • J. H. Min
  • Department of Horticultural Science, College of Agriculture and Life Science, Chungnam National University, Daejeon, 34134, Korea.
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H. M. P. Chamidha Kumarihami
  • H. M. P. Chamidha Kumarihami
  • Department of Horticulture, College of Agriculture and Life Sciences, Gyeongsang National University, Jinju 52828, Korea.
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  •  Received: 07 April 2018
  •  Accepted: 13 June 2018
  •  Published: 30 June 2018

Abstract

In this study, near infrared (NIR) spectroscopy was performed to establish a non-destructive method to predict the harvesting maturity, fruit ripening and storage ability of Ca-chitosan treated baby kiwifruit. Destructive measurements of firmness, dry matter (DM), soluble solids content (SSC), and acidity was performed. The calibration range investigated for dry matter content (DM) and SSC using NIR reflectance spectrums were observed at 729-975 nm wavelengths. NIR predictions of those quality factors were calculated using the modified partial least square regression method. The predicted R2 value for DM and SSC was 0.73, and the standard error deviation (SED) value was greater than 2. The correlation between the actual value and predicted model of DM were r = 0.74. The correlation between the predicted DM content and the actual SSC, using SSC model was r = 0.65. The correlation between the predicted value of SSC and the actual value of SSC (baby kiwifruits ripen with ethylene) was r = 0.48, which was lower than the actual SSC model. Further, Ca-chitosan pre-harvest treatment on baby kiwifruit showed considerable effects on baby kiwifruit quality. The actual DM content of untreated fruits was 21.4% and it was 22.3% in Ca-chitosan treated fruits. Also, the predicted DM content was significantly high in Ca-chitosan treated fruits (22.7%) compared to untreated fruits. NIR spectroscopy is an effective and efficient method to measure DM and SSC to determine the fruit harvest maturity hence, date of harvest and storability for quality baby kiwifruits from the marketing point of view.
 
Key words: Ca-chitosan, firmness, harvest index, maturation, nondestructive measurement.