Effects of the Fruit Set Position and Training Method on Brix of Fall-Cropped Muskmelon Fruit

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  • Hirai Goh
    Hokkaido Nuclear Energy Environmental Research Center
  • Goto Eiji
    Hokkaido Nuclear Energy Environmental Research Center
  • Nakamura Ryuichi
    Hokkaido Nuclear Energy Environmental Research Center

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Other Title
  • メロンのハウス抑制地ばい栽培における着果節位および整枝方法が果実糖度に及ぼす影響
  • メロン ノ ハウス ヨクセイチバイ サイバイ ニ オケル チャッカセツイ オヨビ セイシ ホウホウ ガ カジツ トウド ニ オヨボス エイキョウ
  • メロンのハウス抑制地ばい栽培における着果節位および整枝方法が果実糖度に及ぼす影響(栽培管理・作型)

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Effects of the fruit set position and training method on Brix of fall-cropped muskmelon fruit (cv. ‘Rupia Red’) were examined. Plants were topped at the 3rd node and two primary lateral shoots were grown as the main stems. Two bearing shoots were left at the 6-7th, 8-9th, 10-11th or 12-13th node of each primary lateral shoot and one fruit was set at the 1st node of each bearing shoot. Secondary lateral shoots except the bearing shoots were removed up to the 15th or 20th node of the primary lateral shoots. As the node order of the bearing shoot rose from the 6-7th to 12-13th, Brix decreased from 13.1% to 11.6%. However, the total yield decreased as the node order of fruit set lowered. Topping of the main stem had a large effect on Brix. The average Brix was 10.9% when topped at the 25th node, while it was 12.2% for non-topped plants. The parameter that had the greatest effect on Brix was the fresh weight of the leaf blades above the fruits, and the effect was significant. These results suggest that the number of healthy leaves above the fruits is critical for stabilization of the fruit quality of fall-cropped muskmelon.

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