| Summary: | 碩士 === 國立中興大學 === 園藝學系所 === 96 === The effect of different cultural medium on growth of Phalaenopsis I-Hsin Cream ‘KHM-246’ and Phal. Luchia Pink ‘KHM-1078’ plantlets by simulated dark shipping through using the following four growing medium composition including sphagnum moss medium, granulate sponge medium, sphagnum-bark mix medium and fine bark
medium, and the changes of physical and chemical properties of these different medium were investigated. There were better performance for vegetative growth of
the plantlets Phalaenopsis I-Shin Cream ‘KHM-246” and Phal. Luchia Pink ‘KHM-1078’ within eight months by using sphagnum moss medium, granulate sponge medium, and sphagnum-bark mix medium. However, along with cultivated day, the chlorophyll contents and root activity of each treat plants declined. In reproductive growth period, of the four growing medium, sphagnum moss, granulate sponge or
sphagnum with bark mix medium cultured ‘KHM-1078’ plants showed better flower quality and high secondary flower stalk emergence rate.
In terms of container medium moisture capacity, sphagnum moss presented highest capacity out of the four medium, then sphagnum with bark mix is second, and fine bark is the lowest. On the contrary, air-filled porosity of fine bark is the highest one, granulate sponge is second and sphagnum moss is obviously the lowest. The data showed sphagnum moss with highest container medium moisture capacity and sphagnum-bark mix is next, fine bark is the lowest. After 8 month of cultivation, the change of physical and chemical properties of sphagnum moss and granulate sponge are proved to be less changes. The container medium moisture capacity of the fine bark increased along with longer period of cultured date increases.
The pH of sphagnum moss, granulate sponge, sphagnum-bark mix medium and fine bark which are 4.91, 5.64, 4.89 and 4.87 which all showed acid medium. Medium pH of these plantlets declined depending on cultivation days increased.
Medium pH of sphagnum moss showed lowest value. Of those 8 month cultivated plantlets, the change of each medium EC contents showed no significant difference or slight increase, however, after 1 month cultivation, sphagnum moss, granulate sponge and sphagnum-bark mix showed acutely change. The EC of sphagnum moss, granulate sponge and sphagnum-bark mix become increased, but fine bark showed stable change around 0.05- 0.08 mS/cm. White flower cultivate phalaenopsis were greatly influenced by temperature during simulated dark shipping on the growth, and plantlets which grown in the 96 different medium also showed different responce. The data showed simulated bared
root dark shipping is that the basal leaf chlorophyll content of each treatment were declined after transplant, in addition, ‘KHM-246’ after shipping and root activity also declined. However, after transplant, the root activity of sphagnum moss, sphagnumbark mix, fine bark medium grown bared root plants and with pot of sphagnum moss plantlets become vigonity. After shipping, only the big white type ‘KHM-246’ plantlets that were grown by sphagnum moss appeared chlorosis and surface buldges
on the top and basal leaves. In conclusion, this study showed that sphagnum moss medium can be replaced by granulate sponge or sphagnum-bark mix medium. Sphagnum with bark mix medium is the best for Phalaenopsis growing in terms of root ball structure or flower stand vertically.
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