Different planting time, natural conditions and harvest time are different in different places. Alisma orientalis planted in autumn is mostly harvested when the plants wither. Alisma orientalis planted in Guangdong and Guangxi were harvested before new leaves grew in the second year. When harvesting, draw a circle around the bulb with a knife, cut off some roots, then pull up the plants, and then remove the soil and residual roots. Except for the central lobe, the wound drains juice, which turns black after processing and the top is sunken, which affects the quality. The remaining leaves were stripped clean. Exposing the collected bulbs in the sun for 2-3 days, baking, turning 1 time every 24 hours, and removing soil impurities; The next day, the fire power can be reduced appropriately, and the soil impurities can be removed again every 12 hours, and the surface of Alisma orientalis is covered with heat preservation; On the third day of baking, when the bulbs of Alisma orientalis are 50% to 60% dry and the fibrous roots and rough skin are crisp, take them out and put them in a cage or a hair remover to knock off the fibrous roots and rough skin, and then keep the furnace temperature at 50-60℃. Knock off the fibrous roots and rough bulbs of Alisma orientalis, put them in a sulfur furnace for 24 hours to make them white and sweat for 3-5 days, and then continue baking in the furnace, keeping the furnace temperature at 45-50℃ until they are completely dry. Finally, put it into a cage or a depilating machine, and knock off the remaining fibrous roots and rough skin to become a commodity.

Alisma orientalis and its decoction pieces