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本试验用皖西山区不同海拔高度所采收的当年西洋参种子,在17 .0 ±1 ℃条件下处理30d ,然后移至12 .0 ±2 ℃的室内,观测种子裂口率和胚长,并分别以其为因变量(Y) ,以≥10 ℃积温为自变量(X) ,进行模型拟合,结果发现,裂口率与积温关系在胚分化与胚快速生长期分别满足方程Y 1 - a 1 - b 1 ·lgx = 0 和b 2Y 2 - Y 22 + a 2x 2 = 0 ;胚长和积温关系Y 3 - a 3x - b3Y32 = 0 方程,且拟合精度较高。种子在室内处理60d 后, 裂口率最高可达93 .5 % 。12 月20 日前播种,经过80d 以上自然低温( - 2 - 4 ℃) 的生理后熟期,出苗率达80 ～90 % 。
In this experiment, the seeds of Panax quinquefolius collected in different altitudes of western Anhui were treated under the condition of 17.0 ± 1 ℃ for 30 days and then moved to the room of 12.0 ± 2 ℃. The seed gap rate and embryo length were observed. The results showed that the relation between rift rate and accumulated temperature in embryo differentiation and embryo rapid growth period respectively satisfies the equation Y 1 - a 1 - b 1 · lgx = 0 and b 2Y 2 - Y 22 + a 2x 2 = 0; the relationship between the length of the embryo and the accumulated temperature is Y 3 - a 3x - b 3Y 32 = 0 and the fitting accuracy is high. After the seeds were treated indoors for 60 days, the breach rate could reach 93.5%. Seeding before December 20, after 80 days of natural low temperature (- 2 - 4 ℃) physiological maturity, the emergence rate of 80 to 90%.