The 2011 ASHS Annual Conference

Sphagnum moss used primarily as Phalaenopsis planting medium has the following characteristics : it takes a lot of time to absorb enough water when it is dry. Usually overhead watering can cause lots of water loss. In addition, put the pot in a water bucket can lead to waterborne infection.To solve these problems, and find easy way to assess the water management of Phalaenopsis,percentageoffreshflowersaccordingtofourkindswateringmethodswhichwere No watering, Every week watering, Wick watering (which water was supplied after confirming the dried sphagnum moss, and the remaining water was discarded after the moss absorbed enough water), and Humidity supply (which supplied humidity only with filled water up to under media, but the water wasn't reached to media) was investigated. During 10 weeks, daytime environment (07:00~19:00) was investigated as 989.1 Lux(light intensity), 23.4°C(temperature), and 46.6%(Relative humidity) respectively. Percentage of fresh flowers treated with Humidity supply decreased rapidly until 3rd week. It showed 40% from 3rd to 6th week and was reduced to less than 10% at 8th week. Percentage of fresh flowers treated with No watering showed more than 50% until 7th week and lost ornamental value at 8 th week. Percentage of fresh flowers treated with Wick watering and Every week watering maintained ornamental value more than 70% until 10th week.