The yield of tuber and colchicine content could be increased by means of promoting the growth of stem and leaves and elongating the effective photosynthetic time before the peak appeared.

• 高峰期前，用促进茎、叶生长和延长有效光合作用时间的方法，能在生长后期提高块茎的产量和秋水仙碱的含量。