異なる土壌で栽培したキバナオウギの生育および配糖体含量について

概要

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The effects of soil groups on the growth and the amounts of isoflavonoids, astragalosides and dilute ethanol-soluble extract in the tap root of Astragalus membranaceus BUNGE, which is one of the original plants of the crude drug "Huangqi (黄耆)," were studied by growing the plants in Tsukuba, for one year in concrete frames (4 m^2) filled with 4 different kinds of soil i.e. sandy, red, ando and brown soils. 1. The best growth and high isoflavonoid contents in the tap roots were found in the plants grown in the sandy and brown soils. In the sandy soil plot, these effects may be ascribed to the very high phosphoric acid (P_2O_5) content in the soil. 2. Of the 4 soils tested, the sandy soil had the lowest gaseous phase content. However, this soil physical property apparently gave little influence on tap root elongation or development of lateral roots in this experiment. 3. No significant difference was observed in the amount of dilute ethanol-soluble extract of the tap roots of the plants grown in the 4 soil groups. 4. High astragaloside contents were found in the tap root of the plants grown in the red and ando soils. We considered that this result was due to the thickness of roots: the tap roots of the plants grown in these soils were more slender than those in sandy and brown soils, and the root astragaloside contents are known to be higher in the slender roots.
日本生薬学会の論文
1996-08-20