桃树枝条加粗生长期对水分胁迫反应十分敏感且有后效。枝条伸长生长对水分胁迫的反应不如加粗生长那么敏感,且水分胁迫一旦解除,伸长生长速度就可基本恢复。叶片的扩展生长对水分胁迫的反应较迟钝,叶原基的发生对水分胁迫特别敏感。果实的细胞分裂对水分胁迫具有很强的忍受能力,但果实细胞膨大的速度受水分胁迫的影响较敏感。果实硬核期土壤水分亏缺对果实生长的抑制作用较小,且采收时果实体积不受影响。桃树在果实细胞迅速膨大期间,土壤水分亏缺能显著地减少采收时的果实体积;在此之前的水分胁迫一般不会减少果实体积,相反对后期果实的生长具有刺激作用。采收后,桃园土壤干旱处理并不显著地影响第2年果 Peach branches bold growth phase of the water stress response is very sensitive and effective. The elongation of the shoot growth response to water stress is less sensitive than the bold growth, and once the water stress is relieved, the elongation growth rate can be basically restored. Leaf expansion is slow to respond to water stress, leaf primordium is particularly sensitive to water stress. Fruit cell division has strong tolerance to water stress, but the rate of fruit cell swelling is more sensitive to water stress. The effect of soil water deficit on the fruit growth during hardwood stage was less, and the fruit volume was not affected at harvest. Peach tree during the rapid expansion of fruit cells, soil water deficit can significantly reduce the volume of fruit harvest; Prior to the water stress generally will not reduce the volume of fruit, on the contrary has a stimulating effect on the growth of the late fruit. After harvest, soil drought treatment in Taoyuan did not significantly affect the second year of fruit