我国利用自主研发的日光温室栽培果树已成为现代果树产业发展的重要形式。在日光温室有限的空间内，桃果实采收后的缩冠修剪（修剪量占枝条总量的70%左右）是维持适宜树体结构，保证丰产、稳产的一项关键技术。但缩冠修剪后充分灌溉管理下易造成营养生长旺盛、影响花芽分化，人工修剪成本增加、水肥资源浪费严重。本研究采用日光温室定位试验与实验室测定相结合的方法，研究"缩冠修剪-树冠恢复"期"器官再造"过程中水分调控下根系的生长与更新模式或方式，阐明树冠恢复与根系生长及更新的协同作用，探索树体生理生化、水分利用、生长和产量等对水分调控的补偿效应，揭示水分调控下整个树体的协同生长发育机制，以期补充完善日光温室条件下水分调亏灌溉理论，并为生产实践提供理论支持。通过水分调控，把水资源的节约、合理使用与减少修剪量、降低生产成本有效结合，对产业的可持续发展有重要作用。

Fruit trees cultivated in chinese solar-greenhouse has become an important form of modern fruit production. Greenhouse has limited space, after the peach fruit harvest, using a important pruning technique, "canopy reduction" (trim 70% of total branches) is necessary to maintain a suitable tree structure and ensure the high and stable yield. However, after the "reduction", full irrigation management could easily lead to vigorous vegetative growth, affect flower bud differentiation, increase in labor cost and waste fertilizer and water resources. In this study, Greenhouse water control experiment combined with laboratory determination method will be used to study the growth and regeneration mode of root system in the process of "organ recycling" during the "canopy reduction pruning -- restoration" key phenology stage, clarify the synergies of canopy recovery and root growth and renewal, exploring water regulation compensation effect of physiological and biochemical, water use, growth and yield, revealing synergistic growth and development mechanism of the entire tree under water control, with the aim to supplement and improve water deficit irrigation theory under the solar greenhouse conditions, and provide theoretical support for the production practice. By water control, the effective integration of water conservation, reduce the pruning labor cost and production cost, would be a very important factor for the sustainable greenhouse peach production. Keywords: Greenhouse; peach; Canopy reduction pruning; vegetative/reproductive growth; water regulation