養液栽培におけるアールスメロン(Cucumis melo L.)の生育時期別の窒素吸収と分配

元データ 2000-02-05 社団法人日本土壌肥料学会

概要

The dynamics of nitrogen in hydroponically grown muskmelons was examined in detail from the stage of vegetative growth to harvest. At harvest, 70% of the plant nitrogen was absorbed after pollination and 76% of it was distributed to the fruit. It was suggested that a substantial amount of the nitrogen absorbed via the roots before and just after pollination was directly distributed to the infant fruit and that, after pollination, the fruit development and maturation were caused by the redistribution of the nitrogen from other organs. In order to clarify this point, we examined the nitrogen dynamics in plants from the viewpoint of the source-sink relationship. In summary, fruit always functions as a large 'sink,' and nearly 50% of the fruit nitrogen at harvest is derived from the redistribution of nitrogen from other organs, mainly from the leaves. The leaves were classified into three groups in terms of their function, either as a source organ or a sink organ. It was then found that they function as a large 'source' of nitrogen after pollination.

著者

久保 研一 熊本県農業研究センター
久保 研一 熊本県農業研究センター農産園芸研究所
寺岡 裕子 熊本県農業研究センター:(現)玉名農業改良普及センター
福徳 康雄 佐賀大学農学部
児藤 俊一 佐賀大学農学部
福徳 康雄 佐賀大学農学部:(現)鹿児島大学アイソトープ総合センター

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