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目的：探索中麻黄的最佳采收期。方法：测定不同生长年限和不同生长月份中麻黄的麻黄碱含量。结果：不同生长年限和不同生长月份麻黄碱的含量不同。多年生中麻黄在１０月到次年４月初麻黄碱含量最高；种子繁殖的中麻黄在第３年可达到药用标准；再生中麻黄第１年即可达到药用标准，第２年麻黄碱含量最高。结论：种子繁殖的中麻黄在第３年采收为宜；野生和人工栽培的再生中麻黄应两年采收１次，采收期应在１０月到次年４月。
Objective: To explore the best harvest period of Ephedra. Methods: The ephedrine content of ephedra in different growth years and different growth months was determined. Results: The content of ephedrine was different in different growth years and different growth months. Perennial ephedra has the highest ephedrine content from October to the beginning of April; seed ephedras can reach the medicinal standard in the third year; the ephedra can reach the medicinal standard in the first year and the ephedrine content in the second year. highest. Conclusion: The seed breeding medium ephedra is suitable for harvesting in the third year; the wild and artificially cultivated medium ephedra should be harvested twice a year, and the harvest period should be from October to April.