ムラサキの栽培研究 : 施肥と栽培期間

概要

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Lithospermum erythrorhizon Sieb. et Zucc, which has not been cultivated long, still retains features of wild plant. Since its growth is liable to various environmental factors, cultivation of this plant is not easy. In order to study the effects of fertilizer on the growth and the components, L. erythrorhizon was cultivated under fertilized and non-fertilized conditions in a field in Tsukuba for 4 years. The plants cultivated under the fertilized conditions grew well for the first two years, but after that period, many withered and the percentage of survived plants gradually decreased. However, the yield per field of the root cultivated under the fertilized conditions was higher than that under the non-fertilized conditions. The naphthoquinone content of the roots cultivated under the fertilized conditions throughout the cultivation period was lower than that under the non-fertilized conditions. From these findings, we concluded that two year-cultivation under fertilized conditions should be the best program for L. erythrorhizon, when the yield and the naphthoquinone content of roots are considered.
日本生薬学会の論文
1996-02-20