It has been found out that the normal growth of Coptis chinensis is heavily affected and both NRA in leaves and berberine contents in rhizome are very low when seedlings are short of nitrogen,phosphorus and potassium.

• 氮、磷、钾缺乏都大大影响黄连植株的正常生长，叶片硝酸还原酶的活性和根茎小檗碱的含量都很低。