目的 探索評價曼陀羅和毛曼陀羅花的最佳采收期的方法。方法 將兩種曼陀羅花的生長發(fā)育過程進行量化，與Logistic生長曲線方程擬合，建立數(shù)學(xué)模型，運用有序聚類分析法將其生長過程劃分不同采收期，以活性成分為指標(biāo)，對兩者最佳采收期進行界定。結(jié)果 兩種曼陀羅花的生長過程與Logisitic生長曲線方程擬合良好，有序聚類分析后將其花的生長發(fā)育過程劃分為5個階段，依此確定的最佳采收期與以往研究中藥材最佳采收期方法不同。結(jié)論 該研究中藥材最佳采收期的方法值得進一步研究并推廣。

Objective To establish the new method for evaluating the best harvest period of Datura stramonium and Datura innoxia flowers. Methods The growth processes of D. stramonium and D. innoxia flowers were quantified and fit with Logistic growth curve equation, so as to set up a mathematical model, then using cluster analysis method to divide the orderly growth process into different collection periods. The active ingredient was used as the index of the two to optimize the best harvest period. Results The growth of D. stramonium and D. innoxia flowers and Logisitic growth curves fit well. After cluster analysis, orderly growth and development of the flowers were divided into five stages so that the differences between the present best harvest period and the best harvest period of the traditional Chinese medicinal materials (TCMM) in the past years were observed and optimized. Conclusion The available way to study the harvest period for TCMM is worthy to be further studied and promoted.