種球貯藏方式對伯利恆之星(Ornithogalum saundersiae Bak.)產期及開花品質的影響

Abstract

At Mei-Feng highland farm of National Taiwan University, the harvested bulbs of Ornithogalum saundersiae Bak. were solarized in plastic house for six weeks. In early March, some tested bulbs were planted as check and the others were stored in dark incubators of 3℃, 8℃ and 20℃ or continuously solarized in plastic house, respectively. Stored and solarized bulbs were planted in early May and early July. The subsequent growth of the bulbs showed that delayed the flowering period due to low temperature growth restriction. The incidence of bulbs decay rose with the expending of storage period. Solarized bulbs were good in sprout rate, flowering rate, no. of flower stalk per bulb and flower stalk length. Bulbs stored in 3℃ behaved badly and decayed seriously, even reached to 100% after four-month storage. After fourmonth storage, bulbs stored in 8℃ behaved moderately and those could delay flowering to mid-November. Bulbs stored in 20℃ after two months behaved the same as bulbs solarized in plastic house, and could force flowering to early August. To summarize the results, 3℃ is not suitable the bulb of 'Star of Bethleham'. Bulbs solarized in plastic house usually flowered in normal season in spite of the different from March to May. While only delayed flowering about half a month when planted in July. Bulbs stored in 20℃ for two months can force flowering earlier, and bulbs stored in 8℃ for four months can delay flowering properly.