Effect of Kinetin and Calcium on Growth and Flowering Quality of Oncidium ''Gower Ramsey''

• Main Authors: Rong-Hua Hsu, 許榮華
• Other Authors: Ruey-Song Lin
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/43462806024836166138

碩士 === 國立中興大學 === 園藝學系 === 90 === This studies were conducted through kinetin spraying and Ca fertilizer addition to pursue the growth of vegetative organs and inflorescence quality and its effect in physiological change by using Oncidium ‘Gower Ramsey’, and moreover improve the flowering quality of Oncidium cut flower. Among various Ca fertilizers treatments, use Ca(NO3)2 as Ca fertilizer to treat had better inflorescence quality including higher total floret number and longer flower stalk length and more branching number. In CaCl2 as Ca fertilizer to treat, total soluble sugar content was obvious higher in column and labellum than that of other Ca fertilizers treatments. Kinetin spraying could obvious increase inflorescence quality of Oncidium ‘Gower Ramsey’ including flower stalk branching number and total floret number of inflorescence. Kinetin 100 ppm spraying worked best on quality of cut flowers among all of the concentration treatments. Kinetin spraying could maintained high level of leaf chlorophyll content, obvious increased starch content and obvious decreased total soluble sugar content of pseudobulb. The mixture treatment of calcium 300 ppm fertilizer supplied with kinetin 100 ppm spraying could also promote the inflorescence quality of Oncidium ‘Gower Ramsey’ in which included flower stalk branching number and total floret number of inflorescence. Supplying Ca 300 ppm fertilizer only could obvious increased total soluble sugar content of both column and labellum, starch content of pedicel, and also calcium content of labellum. Calcium 300 ppm supplied could obvious increase the thickness, fresh weight, dry weight of pseudobulb and could obvious increase total soluble sugar content of both pseudobulb and vegetative leaves. Calcium 300 ppm supplied with kinetin 50-200ppm spraying could maintain high level of leaf chlorophyll content, however, it would reduce total soluble sugar content of both pseudobulb and vegetative leaves and would increase starch content of pseudobulb significantly. In plant element analysis, Ca 300 ppm fertilizer supplied with kinetin 50-200 ppm spraying could increase Ca content of pseudobulb significantly, however, N, K, and Mg content of that decreased.