| Summary: | 碩士 === 國立中興大學 === 園藝學系 === 87 === Oncidium ‘Gower Ramsey’ was used in the studies to seek for increasing inflorescence quality by calcium supplement and ventilation control. The relationship among inflorescence quality, vase life, and vegetative organ which related to microelements, especially, calcium supplement and ventilation were investigated.
Increasing calcium supplement increased inflorescence quality, which the length of flower stalk got longer and florets were more as well, of Oncidium ‘Gower Ramsey’. Nevertheless, overdosage of calcium fertilizer inhibited the elongation of flower stalks. As experiment result, the optimum range of calcium supplement was around 200 ppm and 250 ppm. Calcium supplement did not show stability on vase life.
Ventilation treatment with plastic tube increased the width, thickness, and dry matter of pseudobulb of oncidium. The inflorescence quality was increased by increasing branch pedicel of flower stalk and flower stalk length, as well as florets number.
Both ventilation and calcium supplement on oncidium culture, calcium concentration was controlled at 150 ppm and ventilation together showed the improvement of inflorescence quality which the length of flower stalk got longer and florets were more as well and longer vase life. However, calcium supplement concentration was over 250 ppm, the vase life was deteriorated.
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