Factor Analysis of Nondestructive Measurements of Onion Bulb Internal Rot

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  • NISHINO Masaru
    Agriculture Institute, Hyogo Prefectural Technology Center for Agriculture, Forestry and Fisheries
  • KUROKI Shinichiro
    Graduate School of Agricultural Science, Kobe University
  • NAKANO Shinichi
    Agriculture Institute, Hyogo Prefectural Technology Center for Agriculture, Forestry and Fisheries
  • DEGUCHI Youhei
    Technological Development Department, SAIKA Technological Institute Foundation
  • ITOH Hiromichi
    Graduate School of Agricultural Science, Kobe University

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  • タマネギ内部腐敗球の非破壊判別精度に及ぼす要因の解析
  • タマネギ ナイブ フハイキュウ ノ ヒハカイ ハンベツ セイド ニ オヨボス ヨウイン ノ カイセキ

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Abstract

<p>Some rotten onion bulbs cannot be detected by visual inspection or palpation. Contamination of rotten bulbs into the shipping products diminishes the reliability of production area. In this study, the feasibility of using visible and near-infrared spectroscopy for the nondestructive detection of rotten bulbs on a belt conveyance system in a typical onion packing house was investigated. A partial least squares regression model for bulb rot was developed from the acquired spectra. Datasets including different sample sizes and temperatures with a ratio of sound to rotten bulbs of 3 : 1 supported the development of a robust discriminant model. The model achieved correct onion classification of 95.0% when the bulb rot presence-absence threshold was set to level 1.</p>

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