Summary: | 碩士 === 中興大學 === 園藝學系所 === 99 === Dendrobium Sakura and Dendrobium Lucky Angel‘M-1’and Dendrobium Red Emperors ‘Black King’ were used in this study to research the effect of different nitrogen form ratios, different cultural mediums, and different GA+BA mixed liquids treatments on growth and regulating the flowering of nobile-type Dendrobium, and increasing flowering rate.
Dendrobium Sakura and Dendrobium Lucky Angel‘M-1’and Dendrobium Red Emperors ‘Black King were fertilized with nitrogen forms in NO3--N:NH4+-N=6:1 resulted 100% rate of flowering, however, on the number of flowers each node, the rate of nodes with flowers and the total number of flower buds was in the media treatments, when the NH4+-N ratio was higher, the plants grew better than in the NO3--N:NH4+-N = 1:0. However, Dendrobium Lucky Angel ‘M-1’ with fine bark #4/cocoanut chop/cocoanut fibers and cocoanut chop/cocoanut fibers mixture mediums both with nitrogen forms in NO3--N:NH4+-N=6:1 resulted in higher rate of flowering except sphagnum moss/cocoanut chop/cocoanut fibers mixture medium, the rate of flowering were 93.75% and 93.33% respectively, and on the number of flowers each node, the rate of nodes with flowers and the number of flower buds in the media treatments, different nitrogen form ratio treatments had different effects. Dendrobium Red Emperors‘Black King with nitrogen forms in NO3--N:NH4+-N=1:0 resulted in higher rate of flowering, and on the number of flowers each node, the rate of nodes with flowers and the number of flower buds in treatments were no significantly different.
Three nobile-type Dendrobium species Dendrobium Lai''s Christmas, Dendrobium Arco Pearl Queen and Dendrobium Hamana Lake x Dendrobium Lai''s Hunnter Stage in different GA+BA mixed liquids concentrations treatments. After five weeks the the width and thickness of pseudobulbs were no significantly different, and different concentrations of GA+BA mixed liquids treatment for the flowering performance of Dendrobium Lai''s Christmas and Dendrobium Arco Pearl Queen in the two species have little impact, and Dendrobium Lai''s Christmas with GA 150 mgL-1 + BA 200 mgL-1 treatment had the higher rate of flowering was 85.71%, followed by GA 100 mgL-1 + BA 200mgL-1 and control the rate of flowering were both 71.43%. Dendrobium Arco Pearl Queen with GA 50 mgL-1 + BA 200mgL-1 and GA 100 mgL-1 + BA 200mgL-1 treatment had the higher rate of flowering were both 66.67%, followed by GA 150 mgL-1 + BA 200mgL-1 and GA 200 mgL-1 + BA 200mgL-1 treatment were both 33.33%, and the control was the lowest. Dendrobium Hamana Lake x Den. Lai''s Hunnter Stage in this study, treatment with different GA+BA mixed liquids concentrations, and the pseudobulbs and flowering seem to no significantly different. This study on the difference between spices resulted somewhat different result.
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