秋期栽培における品種の異なるホウレンソウの還元糖,アスコルビン酸,シュウ酸および硝酸含量

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タイトル別名
  • Effect of Growth Stage on Contents of Reducing Sugar, Ascorbic Acid, Oxalate and Nitrate in Spinach
  • シュウキ サイバイ ニ オケル ヒンシュ ノ コトナル ホウレンソウ ノ カンゲン トウ アスコルビンサン シュウサン オヨビ ショウサン ガンリョウ

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Seven cultivars of spinach (Spinacia olerancea L.)-Parade, Hoyo, Jiromaru, Orai, Orakuru, Okame, and Orion-were studied under the same fertilization and climatic conditions. Changes in the contents of reducing sugar, ascorbic acid, oxalate and nitrate in each cultivar were determined. The cultivars were all harvested 41 days after sowing. Hoyo, Jiromaru, and Orai were harvested again 7 days later (at day 48), Orakuru, Okame, and Orion were also harvested again 19 days later (at day 60). The contents of reducing sugar and ascorbic acid in the fast-growing Parade were lower than in the other cultivars. The ascorbic acid contents of Hoyo, Jiromaru, and Orai increased as the harvesting time was delayed. The nitrate content of Hoyo also increased. The amounts of ascorbic acid in Orakuru, Okame, and Orion were higher than those of other cultivars throughout the growing period until day 41. However, they did not show any increase when determined at the harvest time.

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