白芷干物质积累和异欧前胡素的动态研究

Dynamic characteristic of dry matter accumulation and isoimperatorin in Angelica dahurica

目的明确白芷不同生长时期干物质积累及根中异欧前胡素质量分数和积累量变化。方法采用称重法测定白芷干物质,高效液相色谱法测定根中异欧前胡素。结果白芷地上和地下部分干物质积累呈“S”型曲线,地上部分干物质在7月底至10月初逐渐增加,10月中旬达到高峰,随后降低;地下部分干物质前期增加较慢,8月底至9月底为快速增长期,随后增加稍有减慢。根中异欧前胡素以7月底8月初最高,为0.2453%,10月底最低,为0.1177%。异欧前胡素积累量在10月底收获时达到最大。结论以白芷产量和异欧前胡素积累量为白芷的收获目标,10月底为白芷的收获期,与传统采收期一致。

Objective To study the accumulation of dry matter and changes of isoimperatorin content and accumulation in the root of Angelica dahurica in different growth and development duration. Methods(Use) weighing method to weight the dry matter and an HPLC method to determine the content of isoimperatorin in A. dahurica root. Results Dry matter accumulation of aerial part and under ground part of A. dahurica showed 'S' curve, dry matter of aerial part gradually increased from the end of July to the early October and got to the peak in mid-October, then gradually decreased; dry matter of under ground portion increased slowly in earlier stage and became rapidly from the end of August to the end of September, then reduced. Isoimperatorin content in A. dahurica[WTBZ] root was the highest in the end of July and the early of August as 0.245 3% and the lowest in the end of October as 0.117 7%. The accumulation of isoimperatorin was the highest in the end of October when A. dahurica was harvest. Conclusion Taking A. dahurica yield and the accumulation of isoimperatorin as harvest aim, the optimal time for harvest is at the end of October.