ロックウール耕における培養液濃度がミシマサイコ (Bupleurum falcatum L.) の生育, サイコサポニン濃度と無機成分濃度に及ぼす影響  [in Japanese] Effect of Concentration of Nutrient Solution on Plant Growth, and Saikosaponin and Mineral Contents of Bupleurum falcatum L. Grown in Rockwool  [in Japanese]

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Abstract

生薬「柴胡」の基原植物であるミシマサイコについて, 養液栽培での施肥管理法確立を目的とし, 灌液する培養液のECと生育, サイコサポニン含有量, 植物体中の無機成分組成との関係について調査した. ミシマサイコの栽培は, PVCパイプを利用した循環式ロックウール耕で行った. 培養液は大塚B処方とし, 処理区は灌液する培養液濃度について0.6 dS m<sup>-1</sup> (1/4単位区), 1.2 dS m<sup>-1</sup> (1/2単位区), 2.4 dS m<sup>-1</sup> (1単位区)の3水準とした. 地上部の生育, 最大葉の葉面積および草丈は, 1単位区で他の区に比べて低下したが, 地下部乾物重には処理の影響がなかった. T/R比は1単位区で他の区より低かった. 乾物重当たりのサイコサポニン含有量には処理区間で差がなかったが, 株当たりのサイコサポニン収量は, 1単位区で最も高かった. 植物体中の無機成分濃度は, 概して1単位区で高い傾向があったが, 植物体中の無機成分の含有比はいずれの区も同様の傾向を示した. また, ミシマサイコに好適な培養液の無機成分組成はN:P:K:Ca:Mg=6.5:4.7:8:1.3:1.8 me L<sup>-1</sup>程度と考えられた.

The aim of this study was to establish the nutrient management practice for the soilless culture of <i>Bupleurum falcatum</i> L., which is the original plant source of the crude drug “Saiko” used for Kampo medicines. The seedlings of <i>B. falcatum</i> were transplanted to PVC tubes filled with granulated rockwool and supplied with quarter-, half- or full-strength Otsuka B nutrient solution, respectively. Eleven-month-old plants were harvested, and the growth and saikosaponin (SS) contents were measured. The mineral concentrations in the plant were also measured to estimate the plants’ nutrient absorption. The top dry weight, maximum leaf area and plant height of plants grown in full-strength solution were lower than those of plants grown in the other treatments. There was no difference in the root dry weight among treatments, and the top to root ratio on a dry weight basis was lowest in the plants grown in full-strength solution. Saikosaponin content per g of root dry matter was not affected by solution concentration. However, saikosaponin yield from plant root was highest from plants grown in full-strength solution. Although the mineral concentration tended to be higher in plants grown in half- and full-strength solutions than in those grown in quarter-strength solution, a similar trend was observed in the ratio of nutrients calculated from those concentrations. The appropriate ratio of the major elements in the nutrient solution estimated from the result was N:P:K:Ca:Mg=6.5:4.7:8:1.3:1.8 (me L<sup>-1</sup>).

Journal

  • Shokubutsu Kankyo Kogaku

    Shokubutsu Kankyo Kogaku 25(2), 83-89, 2013-06-01

    Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists

References:  26

Codes

  • NII Article ID (NAID)
    10031177352
  • NII NACSIS-CAT ID (NCID)
    AA12010914
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    18802028
  • NDL Article ID
    024773374
  • NDL Call No.
    Z18-3397
  • Data Source
    CJP  NDL  J-STAGE  JASI 
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