신도입 케나프 품종의 파종시기에 따른 생육 및 수량 변동과 광합성 특성

Abstract

Kenaf (Hibiscus cannabinusL.), an annual plant of the family Malvaceae, is considered tobe the most promising for alternative plants with potential use as a non-wood fiber source.The objectives of this study were to select the optimum seeding date and adaptable cultivaramong newly introduced kenaf cultivars (Everglades-41, Tainung-2 and Chingpi-3) in Jejuisland, and to clarify the photosynthetic characteristics of those cultivars. Among the threecultivars, the fresh shoot weight per unit area of Chingpi-3 at harvest season showed highestthrough all seeding dates, that of while Everglades-41 was the lowest. The difference of shootyield at harvest mainly due to seedling stand rate and plant number per unit area among thecultivars. The Chingpi-3 showed the highest shoot fresh weight in the seeding date of May 11and decreased trend in the late seeding dates. Net photosynthesis rate was higher onEverglades-41 with entire type leaf than other two cultivars with palmate type leaf. Theactivity of ribulose-1,5- bisphosphate carboxylase/oxygenase(rubisco) estimated from the A-Ci curve showed highest in Chingpi-3 among three cultivars. These results suggest thatChingpi-3 might be adaptable cultivar with seeding date of around May 10 for kenafproduction in Jeju island.