예취 및 적화처리에 따른 시호의 생육특성 및 saikosaponin 함량

Abstract

This study was conducted to investigate the effect of cultural methods(cutting, flower removal) on growth and quality of B. falcatum L. Jeongseon local cultivar collected in Korea and Mishima local cultivar introduced from Japan were used. Some of the results obtained are as follows: Jeongseon local cultivar showed less stem branches and shoot weight compared to Mishima. However, Jeongseon local cultivar showed tall plant height, high root fresh and dry weight, and high levels of saikosaponin-a and total-saikosaponin, but low saikosaponin-c content than that of Mishima. Both cultivars weeded on March 20 had longer main root, bigger stem diameter, few stem branch, and high saikosaponin-c content compared with those of late seeded one, April 30. Growth characteristics such as plant height, stem diameter, stem branch number, shoot weight, root diameter, root fresh and dry weight and root branch number were increased in a low planting density(30×15 ㎝), but the content of saikosaponin was not affected by planting density. Jeongseon and Mishima cultivars seeded on April 10 with 30 15 planting density and April 30 with 30×10㎝ planting density contained highest total saikosaponin levels, respectively. However, average root dry weight was not affected by planting time or density in both Bupleurum cultivars. Both cutting and flower removal increased the length of main root, fresh and root weight, and saikosaponin-a saikosaponin-d and total-saikosaponin in Jeongseon cultivar than that of Mishima. As the harvesting thme was delayed, plant height, stem diameter, shoot weight, length of main root, root fresh and dry weight were increased, but content of saikosaponin-a, saikosaponin-d and total-sakiosaponin were decreased.