園藝作物種子發芽生態與品質改進之研究
Other Title
Studies on Germination Ecology and Quality Improvement of Horticultural Crop Seeds
Journal
蔬菜作物試驗研究彙報(第七輯)
Pages
302-310
ISBN
957-00-2426-7
Date Issued
1993-06
Author(s)
劉政道
T. D. Liou
Abstract
由於本省園藝作物種類繁多，無法全部於短期內進行探討，加上影響蔬花種子發芽與幼苗奠立之因子以及品質改進方法亦極多且繁複，故本項之工作分年執行。本年度選擇本省最重要之夏季葉菜類—蕹菜為材料，進行其種子發芽與幼苗奠立之最佳條件與成長關係之研究以確立蕹菜種子之最適發芽溫度以及溫度範圍與幼苗成長之關係。試驗係將屏東青骨尖葉蕹菜與白骨大葉蕹菜種子分別於15、20、25、30及35°C等不同溫度進行，測定其對於不同品種幼苗萌芽之影響。結果顯示：青骨蕹菜之幼苗開始萌芽時間與幼苗萌芽百分率比白骨蕹菜早且高，兩品種之幼苗萌芽百分率以30°C最高並達50%幼苗萌芽之時間最短，於35°C時，幼苗萌芽百分率略有降低之趨勢但與30°C者差異不顯著，兩品種幼苗之開始萌芽時間、萌芽速率與最終萌芽百分率通常隨溫度之降低而延遲減緩與降低，一般溫度低於20°C時不適合這兩品種蕹菜之幼苗萌芽，尤其在15°C時更為明顯，這兩品種蕹菜幼苗之最適萌芽溫度應在30至35°C之間。
Due to too many kinds of horticultural crops are cultivated in Taiwan at present. It is also too many factors affecting seed germination and seedling establishment with a number of methods for improving seed quality, therefore, it is not able to scope all of the crops within a very short time. The execution of this project is divided into different years. In fiscal year of 1990, the research item was concentrated on temperature influenced on germination of water convolvulus seeds.
Seeds of two cultivars of water convolvulus, cv. Pingtung Green Stem (pointed leaf) and cv. White Stem(broadleaf), were investigated on emergence at different temperature of 10, 15, 20, 25, 30, or 35°C under growth conditions. The results showed that total emergence percentage and time to first seedling emergence were higher and earlier in cv. Pingtung Green Stem than that of cv. White Stem. In two cultivars, total emergence percentage and time to 50% of final emergence were highest and shortest at the temperature of 30°C. However, there was no significant difference to be found between 30 and 35°C conditions. The final emergence percentage, emergence rate and time to first seedling emergence were strikingly declined. It was not suitable for seed emergence of these two cultivars of water convolvulus when the temperature was lower than 20°C. As the result, optimum temperature for emergence of water convolvulus seeds was between 30 and 35°C.
Subjects
溫度
萌芽
蕹菜
種子
temperature
emergence
water convolvulus
seeds
Publisher
高雄區農業改良場
Type
report