根据《中国药典·2020年版·一部》记载：姜黄根茎（姜黄，NMM-0017）为姜科植物姜黄（Curcuma longa）的干燥根茎。冬季茎叶枯萎时釆挖，洗净，煮或蒸至透心，晒干，除去须根。
According to the Chinese Pharmacopoeia (2020 Edition, Volume I), Turmeric rhizome (Jiang-huang, NMM-0017) is the dried rhizome of Curcuma longa. It is dug up in winter when the stems and leaves have withered, washed, boiled or steamed until cooked through, sun-dried, and the fibrous roots removed.