The experiments of potassium nutrition in papaya (Carica papaya L.) showed that leaf blight was caused by available potassium deficiency in soil where papaya was planted.

• 摘要对番木瓜叶枯病与植株营养、土襄相关养分的关系等进行研究，结果表明，番木瓜叶枯病是由于土壤有效钾缺乏而导致的一种生理性缺钾症；