试验表明:甜菜露地越冬采种种子比北繁种子发芽势强,种子萌发出苗快,出苗率高,甜菜幼苗生长茁壮。由露地越冬采种种子生长出的甜菜比北繁种子的甜菜,在叶面积指数、光合势、净光合生产率、干物质生产及光能利用率等主要生理指标上有显著优势。 The results showed that: the over-winter planting seeds of beet exposed more vigorously than the seed of the north, the seeds germinated quickly, the emergence rate was high, and the beet seedlings grew robustly. The beet grown from open-field and winter-harvested seeds had more advantages than the beet from north-bred seed in major physiological indexes such as leaf area index, photosynthetic potential, net photosynthetic rate, dry matter production and light energy utilization rate.