Rapid Evaluation of Salty Wind Damage by the Amount of Salt Adhered to the Panicles of Rice Plant using Electric Conductivity(EC)

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  • Mori Shizuka
    Yamagata General Agricultural Research Center, Department of Agro-Production Science
  • Shibata Yasushi
    Yamagata General Agricultural Research Center, Department of Agro-Production Science
  • Oda Kunio
    Yamagata General Agricultural Research Center, Department of Agro-Production Science
  • Fujii Hiroshi
    Yamagata Univ.
  • Ando Ho
    Yamagata Univ.

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  • 電気伝導率を利用した水稲穂部塩分量の簡易測定による潮風害程度・範囲の把握
  • 栽培 電気伝導率を利用した水稲穂部塩分量の簡易測定による潮風害程度・範囲の把握
  • サイバイ デンキ デンドウリツ オ リヨウシタ スイトウ スイブ エンブンリョウ ノ カンイ ソクテイ ニ ヨル シオフウガイ テイド ハンイ ノ ハアク

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Abstract

Decline of rice yield by salty wind is related to the amount of Na adhered to the rice panicles. Generally, the amount of Na (and/or Cl) in solution is determined by titration with silver nitrate,atomic absorption spectrophotometry and ion chromatography.Although the accurate values can be obtained using these methods, the equipment is not available to most farmers. Therefore, we established a new simple and rapid method for evaluation of Na adhered to panicles using an electric conductivity (EC) meter to quickly determine the amount of Na. We found that the amount of salt per panicle of rice plant evaluated with the EC meter was significantly related to the amount of Na per panicle determined using ion chromatography. The larger the amount of salt per panicle determined using the EC meter, the severer the damage observed in the grains. In addition, a negative relationship was observed between the amount of salt per panicle determined with an EC meter and the distance from sea.

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