本文研究了在果园状况下,梅、杏、桃的水分状况及组织解剖结构.结果表明,梅树叶片伏秋旱卷曲脱落的主要原因是输导系统与耗水结构不协调;气孔调节能力、持水能力及耐旱力差.以致叶片产生严重的水分亏缺,膨压丧失,游离脱落酸大量产生,导致叶片卷曲甚至脱落. In this paper, the water status and tissue anatomy of plum, apricot and peach were studied under orchard condition.The results showed that the main reason of plum fall and autumn curly fall was the uncoordinated conduction system and water consumption structure, stomatal adjustment ability, Poor water holding capacity and drought tolerance, resulting in severe water deficit in leaves, loss of turgor pressure and large amount of free abscisic acid, leading to curly leaves or even falling off of leaves.