Estimation of Chlorophyll a Content by Reflectance Spectrum of Phyllode and Timing of Ferns Cutting in Semi-forcing Green Asparagus Cultivation

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  • アスパラガスの半促成長期どり栽培における光判別による擬葉内クロロフィルa含量の推定と地上部刈り込み時期の判定
  • アスパラガス ノ ハンソクセイチョウキドリ サイバイ ニ オケル ヒカリ ハンベツ ニ ヨル ギヨウ ナイ クロロフィル a ガンリョウ ノ スイテイ ト チジョウブ カリコミ ジキ ノ ハンテイ

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Optical monitoring system of chlorophyll a (Chl. a) content in phyllode was used to quantify the colour change of a phyllode in mother fern cultivation of asparagus in Kagawa prefecture. Changes in phyllode colour represented Chl. a derived from reflectance at wavelengths 590 nm, 620 nm, and 680 nm. This technique will be useful to determine the cutting time of mother fern to achieve stable yields, because the monitoring of Chl. a content will enable estimation of nutrient content in soil. Higher spear yield, especially in spring, was obtained when the mother fern was cut in mid-March, which is the period when Chl. a is absent in the phyllode, compared with that cut in January.

Journal

  • Shokubutsu Kankyo Kogaku

    Shokubutsu Kankyo Kogaku 29 (2), 49-55, 2017

    Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists

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