Effects of 15N-Urea Application to Trunk or Spurs after Peeling the Bark on Shoot Growth of ‘Pione’ Vines under Forced Condition

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  • Ono Toshiro
    Agricultural Experiment Station, Okayama Prefictural General Agricultural Center
  • Tagami Oscar Kotaro
    Agricultural Experiment Station, Okayama Prefictural General Agricultural Center

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Other Title
  • 加温栽培したブドウ‘ピオーネ’の新梢生長に及ぼす樹皮剥皮後の15N-尿素枝幹処理の影響
  • 栽培管理・作型 加温栽培したブドウ'ピオーネ'の新梢生長に及ぼす樹皮剥皮後の15N-尿素枝幹処理の影響
  • サイバイ カンリ サクガタ カオン サイバイ シタ ブドウ ピオーネ ノ シン ショウ セイチョウ ニ オヨボス ジュ カワハギ ヒ ゴ ノ 15N ニョウソ シ カン ショリ ノ エイキョウ

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Abstract

Eight-year-old ‘Pione’ vines were grown in plastic containers under forced conditions. Twelve vines, that were trained to cordon with spur pruning, were used for the experiment. Bark was peeled by high-pressure water two weeks after forcing. After that, 10% 15N-urea solution was applied to the trunk or spurs. In the control vines, tap water was applied to all trunks and spurs.<br> There was no difference in the date of bud-break among the three treatments. At the second leaf-expansion stage, total nitrogen and 15N contents of shoots were higher receiving in vines application to the trunk than in vines receiving application to spurs or in controls. When the trunk of vines was treated with 15N-urea, shoot growth was the most vigorous. The chlorophyll contents in the leaves at the third and fifth node in vines receiving application to the trunk were higher than in those vines receiving application to the spurs or in controls.<br> These results show that nitrogen absorbed throughthe surface of the trunk is effective for growth immediately after bud-break.<br>

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