Noblie-type Dendrobium is one of the important orchids cultivated in Taiwan. In this project， we will measure the seedling index and nutrient elements of dendrobium seedlings. Three dendrobium cultivars divided into four groups according to maturation stage and plant height. The results indicated that plant height， node number， leaf number， shoot fresh/dry weight， seedling index and maturity were no obvious correlated， but water content was increasing in the mature plants. Nitrogen content was affected by species， organs， and cultivated conditions， hence the carbon/nitrogen ration would not appropriate maturation index. As to PGR treatments， the plants are still not blooming. But the results indicated that the application of BA increased the number of leaves and axillary buds. And the application of GA increased the plant height and axillary buds ， but decreased number of leaves， especially in variety 128. BA can neutralize the leaf-falling effect against GA. The TDZ was also tested，the preliminary experimental results indicated TDZ contribute to large amount of flower buds formation. However， the buds had very high rate of deadth and blasting rather than bloom normally. In addition， if the concentration was higher， the rate of blasting was higher.
Noblie-type Dendrobium is one of the important orchids cultivated in Taiwan. In this project， we will measure the seedling index and nutrient elements of dendrobium seedlings. Three dendrobium cultivars divided into four groups according to maturation stage and plant height. The results indicated that plant height， node number， leaf number， shoot fresh/dry weight， seedling index and maturity were no obvious correlated， but water content was increasing in the mature plants. Nitrogen content was affected by species， organs， and cultivated conditions， hence the carbon/nitrogen ration would not appropriate maturation index. As to PGR treatments， the plants are still not blooming. But the results indicated that the application of BA increased the number of leaves and axillary buds. And the application of GA increased the plant height and axillary buds ， but decreased number of leaves， especially in variety 128. BA can neutralize the leaf-falling effect against GA. The TDZ was also tested，the preliminary experimental results indicated TDZ contribute to large amount of flower buds formation. However， the buds had very high rate of deadth and blasting rather than bloom normally. In addition， if the concentration was higher， the rate of blasting was higher.