Effect of the Amount of Nitrogen Application and Ratio of Nitrate and Ammonia Nitrogen on Bitterness and Yield of Cucumbers (<i>Cucumis sativus</i> L. 'Kema') in Hydroponics

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  • KAETSU Keiko
    Research Institute of Environment, Agriculture and Fisheries, Osaka Prefectural Government
  • MORIKAWA Shinya
    Research Institute of Environment, Agriculture and Fisheries, Osaka Prefectural Government
  • NAKAMURA Kenji
    Especmic Corp
  • ABE Kazuhiro
    Graduate School of Agriculture and Biological Science, Osaka Prefecture University

Bibliographic Information

Other Title
  • 水耕栽培における窒素施用量およびアンモニア態窒素と硝酸態窒素の割合が‘毛馬’キュウリ（<i>Cucumis sativus</i> L. cv. Kema）の苦味発現および収量に及ぼす影響
  • 水耕栽培における窒素施用量およびアンモニア態窒素と硝酸態窒素の割合が'毛馬'キュウリ(Cucumis sativus L. cv. Kema)の苦味発現および収量に及ぼす影響
  • スイコウ サイバイ ニ オケル チッソシヨウリョウ オヨビ アンモニアタイ チッソ ト ショウサンタイ チッソ ノ ワリアイ ガ'ケ バ'キュウリ(Cucumis sativus L. cv. Kema)ノ ニガミ ハツゲン オヨビ シュウリョウ ニ オヨボス エイキョウ

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Description

<p>　The purpose of this study was to establish a deep - flow hydroponic culture system to reduce the degree of bitterness in cucumbers (Cucumis sativus L. 'Kema') which consumers do not favor. The effect of the amount of nitrogen application and the ratio of nitrate and ammonia nitrogen on the degree of bitterness and yield of 'Kema' cucumbers grown in hydroponics was analyzed. Commercially available 90% nitrate nitrogen and 10% ammonia nitrogen fertilizers were used for this study. In conventional cultivation, cucumbers were cultivated with 1/2 units of standard (Ohtsuka-A) nutrient solution. The 'Kema' cucumbers cultivated with 2/3 units of standard nutrient solution were more bitter in taste than the ones cultivated with 1/3 units of standard nutrient solution. 'Kema' cucumbers cultivated with less nitrate nitrogen were less bitter in taste than the ones cultivated conventionally. Moreover 'Kema' cucumbers cultivated with less nitrate and more ammonia nitrogen showed more yield than the ones cultivated conventionally. These findings suggest that the bitterness of 'Kema' cucumbers is related to the amount of nitrate nitrogen; additionally, hydroponic cultivation utilizing less nitrate and more ammonia nitrogen can help maintain the yield.</p>

Journal

  • Food Preservation Science

    Food Preservation Science 38 (3), 141-146, 2012

    Japan Association of Food Preservation Scientists

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