Effects of Fertigation Management Based on Apparent Nitrogen Absorption Concentration on Cut Flower Yield, Characteristic Form and Nitrate Nitrogen Concentration of Soil Solution in Carnation 'Nora'

  • Yamanaka Masahito
    Hyogo Prefectural Technology Center for Agriculture, Forestry and Fisheries Graduate School of Natural Science and Technology, Okayama University
  • Goto Tanjuro
    Graduate School of Natural Science and Technology, Okayama University
  • Ogawa Kinoe
    Hyogo Prefectural Technology Center for Agriculture, Forestry and Fisheries
  • Uda Akira
    Hyogo Prefectural Technology Center for Agriculture, Forestry and Fisheries
  • Miyaura Toshifumi
    Otsuka AgriTechno Co., Ltd. Fertilizer & Cultivation Research Center
  • Yamaguchi Kunio
    Otsuka AgriTechno Co., Ltd. Fertilizer & Cultivation Research Center

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Other Title
  • みかけの窒素吸収濃度に基づいた給液法がカーネーション‘ノラ’の切り花収量,形質および土壌溶液の硝酸態窒素濃度に及ぼす影響
  • ミカケ ノ チッソ キュウシュウ ノウド ニ モトズイタ キュウエキホウ ガ カーネーション ノラ ノ キリバナ シュウリョウ ケイシツ オヨビ ドジョウ ヨウエキ ノ ショウサンタイ チッソ ノウド ニ オヨボス エイキョウ

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Abstract

To develop simple and versatile fertilizer management in cultivation by fertigation of carnations (Dianthus caryophyllus L.), the effects of fertilizer management by apparent nitrogen absorption concentration on cut flower yields, characteristic form and soil solution concentration were investigated using the cultivar ‘Nora’. Cut-flower yield by the four-split (seasonally-split) application method was highest among treatments and that by the twelve-split (monthly-split) application method was higher than that of the fixed application method. The cut flower weight (g)/length (cm) ratio of the fixed application method was smaller than that of the twelve-split application method between 33 and 36 weeks after the beginning of harvest. There were differences in EC and nitrate nitrogen concentration between the different methods of treatment. The nitrate nitrogen concentration of soil solution in each treatment ranged from 8 to 169 ppm, from 54 to 103 ppm, and 21 to 108 ppm for the four-split, twelve-split and fixed application methods, respectively, 20 weeks after the beginning of harvest. Fluctuation in the fixed application method was the greatest among the treatments, fluctuation in the four-split application method was least among the treatments examined, and the nitrate nitrogen concentration of soil solution was maintained at an optimal concentration level for the growth of carnations throughout the cultivation period.<br>

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