Warm and semi-arid climates are characterized by rainfall scarcity, resulting in the frequent use of low-quality water for irrigation. This work was undertaken to study the effects of water stress and saline irrigation on yield and grape composition of Monastrell grapevines grafted onto 1103P rootstock. The experiment was carried out during three consecutive seasons in a commercial vineyard located in Jumilla (SE Spain) with a loamy-sandy soil. Rainfed vines were compared with five watering regimes including a Control, irrigated with standard water, and four treatments that combined two different schedules for irrigation initiation (pre- and post-veraison) with saline water obtained by adding two types of salts (sulphates and chlorides). Vines from treatments with more severe water stress (i.e., rainfed) showed lower yields and vegetative growth. Moreover, the Rainfed treatment clearly modified grape composition when compared with the Control treatment by increasing berry phenolic content. The application of saline water slightly affected vine performance and grape composition regardless of the type of salts added to the irrigation water. Indeed, the watering regime had a greater effect on yield, vegetative growth and grape composition than the use of different saline waters. Our results suggest that, in the mid-term (3 years), and with a vineyard soil with good drainage, the use of saline waters is not detrimental to vine performance, but does not improve grape composition. Further research is required to assess the long-term effects of saline water application, particularly in view of the important accumulation of chlorides and sodium in leaf tissues observed in vines watered with salty water at the last season of this experiment.

温暖和半干旱气候的特点是降雨稀少，导致经常使用劣质水进行灌溉。这项工作旨在研究水分胁迫和盐水灌溉对嫁接在 1103P 砧木上的 Monastrell 葡萄藤的产量和葡萄成分的影响。该实验连续三个季节在位于 Jumilla（西班牙东南部）的一个商业葡萄园中进行，该葡萄园具有肥沃的沙质土壤。将雨养葡萄藤与五种浇水方案进行比较，包括对照、用标准水灌溉，以及四种处理方法，将两种不同的灌溉启动计划（转色前和转色后）与通过添加两种盐（硫酸盐和氯化物）获得的盐水相结合）。来自更严重缺水处理（即雨养）的葡萄藤表现出较低的产量和营养生长。此外，与对照处理相比，Rainfed 处理通过增加浆果酚含量明显改变了葡萄成分。无论添加到灌溉水中的盐的类型如何，盐水的应用都会轻微影响葡萄藤的性能和葡萄成分。事实上，与使用不同的盐水相比，浇水方式对产量、植物生长和葡萄成分的影响更大。我们的研究结果表明，在中期（3 年），如果葡萄园土壤排水良好，使用咸水不会损害葡萄藤的性能，但不会改善葡萄成分。需要进一步的研究来评估盐水应用的长期影响，