Relationship between Root Respiration during the Seedling Stage and Rooting Ability of Cabbage and Broccoli Plants after Transplantation.

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  • キャベツ・ブロッコリーセル成型苗の根の呼吸活性と定植後の発根力との関係
  • キャベツ ブロッコリーセル セイケイ ナエ ノ ネ ノ コキュウ カッセイ ト

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The present investigations were conducted to establish a relationship between seedling root respiration rate and the subsequent rooting ability of cabbage and broccoli plants.<BR>1. Root respiration of seedlings was affected by cultural conditions such as shade, defoliation, photoperiod, soil temperature, and flooding treatments. The extremes of these conditions resulted in a decrease in respiration in the root.<BR>2. Drag resistance of the seedlings after planting as measured by universal testing machine was found to be closely related to rooting ability ; its value became lower as root weight decreased and the root distribution became limited.<BR>3. Root respiration was also found to be closely related to rooting ability. It was observed that the higher the rate of root respiration, the more vigorously the root grew. Conversely, a lower rate of root respiration resulted in diminished root growth.<BR>From these data, we conclude that root generation by cabbage and broccoli nursery plants can be predicted by measuring the root respiration rate during the seedling stage.

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