種子大小對蕹菜種子萌芽及活力之影響

Abstract

'屏東尖葉青骨與白骨大葉'兩不同品種之蕹菜種子，以國際標圓篩分<4.0、4.0、4.5及>4,5φmm等四級，並以不分級之種子對照。試係以局部四唑法進行種子活力測定，並將各級種子於30℃之溫度下進行萌芽驗及於田間進行幼苗玍長觀結果示，兩不同蕹菜品種子之萌芽始期、萌芽百分率及幼苗生長受種子大小之影響並不明顯,而田間之結亦發現兩菜品種種子芽期,萌芽百分率與幼生長均與種子大小並無正相關之關係。 Seeds of two cultivars or water convolvulus, 'Pingtung Green Stem' (pointed leaf) and 'White Stem' (broad leaf), were classified into four fractions, which were 41.0, 4.0, 4.5 and 4.5 mm, by standard round sieves, Unsorted seeds were served as control Vigour of different fraction seeds were tested by topographical tetrazolium test. Emergence and seedling growth of different fraction seeds were tested at constant temperature of 300C in a growth cabinet and in the field with different sowing dates respectively. The results indicated that the time to seed emergence, emergence percentage and seedling growth were not significantly influenced by seed size. Similar results were obtained in the field experiment. Seed size did not affect time to seed emergence, emergence percentage and seedling growth of these two cultivars under field condition.