为探索水分调控下设施油桃生长发育机制，完善日光温室条件下水分调亏灌溉理论，给油桃生产实践提供理论支持，以陇油桃1号为试材，采用膜下滴灌控制水分供应，以土壤相对含水量 80%～90%为对照，研究不同水分调控(30%～40%、40%～50%、50%～60%)处理对油桃“营养生长-生殖生长”的调控效应及生理生化和果实品质的影响。结果表明，缩冠修剪后，油桃树体营养生长态势呈“双峰”曲线。各处理枝条生长长度、果实横径与土壤水分含量呈正相关关系。土壤相对含水量为40%～50%时，叶片膜透性增幅最小，但水分利用效率最高，较土壤相对含水量为80%～90%时增加19%。4个处理的叶片OJIP曲线中，J-I相呈降低趋势，土壤相对含水量为30%～40%时I点和P点的最低，其余处理间无显著差异。土壤相对含水量与果实有机酸、Vc、还原糖含量均呈负相关，而与糖酸比呈正相关，除土壤相对含水量为30%～40%的处理外，其余处理间差异不显著。综上所述，日光温室油桃栽培中，适当修剪结合控水有利于枝条生长发育，同时可提高果实品质。土壤相对含水量40%～50%为温室较适宜的控水范围。

In order to explore the growth and development mechanism of protected nectarine productio under water regulation so as to supplement and improve the theory of water deficit irrigation under special conditions in solar greenhouses and to provide the oretical support for production practice, using Long nectarine 1 as the test material, drip irrigation under film was used to control water supply with the relative soil moisture content of 80 to 90% used as the control, the regulation effects of different water regulation treatments(30% to 40%, 40% to 50% and 50% to 60%) on nutritional growth-reproductive growth, physiological and biochemical characteristics, and fruit quality of nectarine were studied. The results showed that a 'double peak' curve of tree nutritional growth was formed after pruning the peach crown, positive correlations were found in the growth length of branches, the rate of fruit expansion with the soil moisture content, respectively. 40% to 50% treatment showed the smallest increase in leaf membrane permeability, but the water use efficiency was the highest which was increased by 19% compared to the control. Among the four treatments, the J-I phase showed a decrease in leaf OJIP curves, with the lowest values at point I and point P in 30% to 40% treatment whereas no significant differences were detected among other treatments. The soil moisture content was negatively correlated with the organic acid, Vc, and reducing sugar contents, while it was positively correlated with the sugar acid ratio, but differences among treatments were not significant except for 30% to 40% treatment. In summary, appropriate pruning combined with water control in nectarine cultivation in solar greenhouses is beneficial for branch growth and development, while improving fruit quality, and relative soil moisture content of 40 % to 50 % is more suitable for greenhouse water regulation range.

S662.1

国家自然科学基金地区基金(31460118)；国家桃产业技术体系兰州综合试验站(CARS-30-Z-17)。