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더덕의 수량증대를 위한 적심, 적화처리 및 삽목 번식기술 개발
김학현(Kim Hag Hyun),황주광(Ju Kwang Hwang),신언동(Un Dong Shin) 한국원예학회 2004 원예과학기술지 Vol.22 No.2
For the purposes of easy cultivation, yield increase and mass-propagation, present experiments were carried to examine the effects of topping and flower pinching on the root growth and the effects of cuttings with different internode positions on the adventitious root formation and growth characters of Codonopsis lanceolata. Compared to control, topping treatments generally reduced the diameter and fresh weight of main roots, except in 120㎝ topping in which there was significant difference with control. The fresh weight of lateral roots was not influenced by topping. Root length and diameter seemed to be increased by flower pinching but no statistical significance was observed. Number of lateral roots and root fresh weight were influenced by flower pinching. Pinching of all the flower (100% pinching) resulted in the highest yield. Cutting of 1~3 internode positions induced high root formation in both Korean (Cheongju) and Japanese species. Especially, the latter produced 40% adventitious root formation with Rootone powder treatment. Paclobutrazol treatment of cuttings resulted in 67~93% root formation. The highest root formation rate was 93% obtained by 10㎎ㆍL?¹ treatment, which was almost four times of that in control.