Background : According to medicinal plant standard culture, flower stalk should be removed at the stage of 4-5 main leaves appearance but there is no detail information on stalk removal in jiwhang (Rehmannia glutinosa L.). This study was carried out to examine effect of flower stalk removal on the increase of total yield in Rehmannia glutinosa L. Materials and Methods ○ Experiment variety : Korea jiwhang, Wongang ○ Treatment : ① Peduncle non-cutting ② Peduncle cutting ○ Planting date : April 18, 2015 ○ Planting distance : 30×15cm ○ Experiment place : Ginseng and Medicinal Plant Research Institute (Geumsan-gun, Chungcheongnam-do) Conclusion : Aerial part growth was no significant difference according to treatments in Wongang and aerial weight was havier in Peduncle cutting than in Peduncle non-cutting. Aerial part growth was no significant difference according to treatments in Korea jiwhang. The roots yield in Korea jiwhang was increased about 5.2% in Peduncle cutting. The roots yield in Wongang was increased about 24.9% in Peduncle cutting.

• Seung Ho Han(Ginseng and Medicinal Plant Research Institute, CNARES) | 한승호
• Gwan Hou Kim(Chungcheongnam-Do Agricultural Research and Extension Services) | 김관후
• Bong Jae Seong(Ginseng and Medicinal Plant Research Institute, CNARES) | 성봉재
• Sun Ick Kim(Ginseng and Medicinal Plant Research Institute, CNARES) | 김선익
• Ka Soon Lee(Ginseng and Medicinal Plant Research Institute, CNARES) | 이가순
• Su Dong Kim(Ginseng and Medicinal Plant Research Institute, CNARES) | 김수동
• Moo Geun Jee(Ginseng and Medicinal Plant Research Institute, CNARES) | 지무근
• Young Hwan Yoon(Chungcheongnam-Do Agricultural Research and Extension Services) | 윤영환
• Hyun Ho Kim(Ginseng and Medicinal Plant Research Institute, CNARES) | 김현호 Corresponding author