本文用盆栽的大豆和豇豆经自然干旱比较研究了二者抗旱性的方式。试验证明大豆属低水势耐旱型,豇豆属于高水势耐旱型。豇豆以其敏感的叶片蒸腾调节机制保持体内的高水势状态,在干旱下RWC和φw变化很小。大豆则以渗透调节为主,使植株在中度水分胁迫下保持一定的生长速率,严重干旱使其生长停止或死亡。结果表明,豇豆具有比大豆更强的抗旱能力。 In this paper, potted soybean and cowpea were compared by natural drought drought resistance of the two ways. Test proved that soybean is low water potential drought-resistant type, cowpea is a high water potential drought-resistant type. Cowpea maintained its high water potential with its sensitive leaf transpiration regulation mechanism, and RWC and φw did not change much under drought. Soybean is mainly osmotic adjustment, so that plants under moderate water stress to maintain a certain growth rate, severe drought to stop or die of growth. The results showed that cowpea has stronger drought resistance than soybean.