Effects of Soil Type and Light Condition on Seedling Quality of Rare and Endemic Plants Orostachys iwarenge and Orostachys iwarenge for. magnus

Ulleunggun Agricultural Technology Service Center, Ulleunggun 799-802, KoreaAbstract - This study was carried out to investigated the effects of soil type and light condition on seedling quality of rare and endemic plants Orostachys iwarenge and Orostachys iwarenge for. magnus . The best seedling quality of O. iwarenge and O. iwarenge for. magnus seedling were shown in Klasmann soil at non-shading or LED (Red+Blue) condition, 50% shading or LED (Red+Blue) condition, respectively. Survival of O. iwarenge seedling was not influenced by the period of experiment but survival of O. iwarenge for. magnus seedling in sandy soil conditions decreased significantly. Results of correlation analysis of seedling quality and survival rate, indicated that O. iwarenge showed a correlation of 0.8 or more at plant height, leaf length and fresh weight. O. iwarenge for. magnus showed a correlation of 0.8 or more at plant height, leaf width and leaf length. Especially, seedling survival of O. iwarenge and O. iwarenge for. magnus showed a correlation of 0.8 or more at first seedling survival and second seedling surviv al. It was important to manage the early seedling stages of O. iwarenge and O. iwarenge for. magnus . Therefore, seedlings with plant height (over 2.5 aE 4 o{ ) and root length (over 3 aE 5 o{ ) were grown vigorously at 35 days after the seedling was transpla nted in mid-April in Klasmann soil of 72 plug cell tray at LED (Red+Blue) conditions.