Growth and Flowering Response of Domestic Bred Gypsophila ‘Dream Song’ as Affected by Heating Time in Plain Area 국내 육성 안개초 ‘드림송’의 평야지 가온시기에 따른 생육 및 개화특성
pp.18-23
This study was investigated the effect of heating time (taken the pots transplanted perennial root in heating greenhouse from Dec. 30 to Mar. 2 as 10 days interval) after 1st cut-flower harvesting on the growth, flowering time, and cut-flower productivity of domestic bred Gypsophila paniculata ‘Dream Song’ in plain area. As the later heating time, the shorter days to shoot emergence and flower budding as the longer exposed to low temperature, and blooming was promoted with increasing the air temperature within greenhouse. Flower stalk length, node number, and stem diameter were inclined to decline in later heating time. In Dec. 30 heating time, node number on a main stem was many, but primary branches number was low due to insufficient breaking of dormancy. Cut flower length was not significantly different as affected by heating time, fresh weight got declined as the later heating time and then drastically decreased in Mar. 2. Cut-flower yield was not significantly different among heating time except for both Dec. 30 insufficiently exposed to low temperature and Mar. 2 shortened the growth duration caused by relatively high temperature. It was thought that the dormancy of ‘Dream Song’ broke after the middle of January under natural low temperature, and the production of second crop should be cultivated within Feb. 20 from mid January.