Characteristics of Growth and Flowering by Nitrogen Levels in Sedum sarmentosum

Sedum sarmentosum Bunge is one of the favorite fresh-vegetables during winter and spring seasons in Korea. To determine the optimum nitrogen fertilization for the production of high quality vegetable, S. sarmentosum was cultivated by cutting propagation in the pot (1/5,000a) and field experiments treated with different levels of nitrogen 0, 5, 10, 15, 20, 30 kg/10a and 0, 10, 15, 20, 25 kg/10a, respectively. In pot cultivation, plant height, number of stem, fresh weight and dry weigh were increased along with added nitrogen level, but they showed no significances in 15～30 kg/10a of nitrogen. SPAD value increased along with added nitrogen level, and it showed no significance in 10～30 kg/10a of nitrogen. The value of L measured by chromameter showed a tendency to decrease along with added nitrogen level. Number of flower stock in Keumsan local strain was decreased according to higher nitrogen level, and it was the highest in 10 kg/10a of nitrogen. Wanju local strain was not bloom in all treatments. In field cultivation, plant height and number of stem were increased with higher nitrogen level, but they were not significant except 0 kg/10a of nitrogen. Other characteristics in field cultivation showed no significances among nitrogen levels. Fresh weight and dry weight were linearly increased according to higher nitrogen level, they were not significant among 15～20 kg/10a of nitrogen levels. The nitrogen level for high quality and maximum growth of S. sarmentosum was 15 kg/10a. Keumsan local strain with abundant flower stock and branches was desirable as a garden plant, and Wanju local strain with higher yield and non-flowering characteristics was favorable as an edible cultivar.