Abstract Optimizing water use in vineyards is crucial for ensuring the sustainability of viticulture in semi-arid regions, and this may be achieved by minimizing direct water evaporation from the soil through the use of mulching. In this context, the current study aimed at assessing the combined effects of the vine-row application of an organic mulch (vine prunings) and no-tillage under two water regimes on soil properties, plant water and nutritional status, yield and must composition of grapevine (Vitis vinifera L.) cv. Bobal grown under semi-arid conditions. For this purpose, a field experiment in a split-plot design was carried out for three years (2016–2018) in a mature Bobal vineyard located in Eastern Spain. Two soil management strategies (tillage and organic mulching with no-tillage) were assessed under two water regimes (rainfed and deficit drip irrigation) with four replications per combination. Vine responses were determined by measuring midday stem water potential, leaf nutrient concentrations, pruning weight, yield components and grape composition. Soil properties were assessed at the end of the experiment. Mulching and no-tillage positively affected vine water status under both water regimes, resulting in reductions in grape phenolic composition. Interactive effects of both water regime and soil management on water use efficiency were found. Regardless of soil management practice, irrigation increased yield and pruning weight when compared to rainfed conditions. Soil management had slight effects on vine nutritional status. At the end of the experiment, soil compaction increased and infiltration decreased as a consequence of mulching and no-tillage. Organic mulch and no-tillage improved vine water status, however, considering the final soil surface compaction and low water infiltration rate, longer-term studies are necessary to assess the sustainability of combining both practices.

中文翻译：

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半干旱葡萄园的土壤管理：不同水分条件下有机覆盖和免耕的综合效应

摘要 优化葡萄园的用水对于确保半干旱地区葡萄栽培的可持续性至关重要，这可以通过使用覆盖物最大限度地减少土壤中的直接水分蒸发来实现。在此背景下，目前的研究旨在评估在两种水情下使用有机覆盖物（葡萄树修剪）和免耕对土壤特性、植物水分和营养状况、产量和葡萄成分构成的综合影响。葡萄 (Vitis vinifera L.) cv. Bobal 在半干旱条件下生长。为此，在位于西班牙东部的成熟博巴尔葡萄园进行了为期三年（2016-2018 年）的裂区设计田间试验。两种土壤管理策略（耕作和免耕有机覆盖）在两种水情（雨养和亏缺滴灌）下进行评估，每种组合重复四次。通过测量中午茎水势、叶片养分浓度、修剪重量、产量成分和葡萄成分来确定葡萄藤的反应。在实验结束时评估土壤特性。覆盖和免耕对两种水分状况下的葡萄树水分状况都有积极影响，导致葡萄酚类成分减少。发现了水情和土壤管理对用水效率的交互作用。不管土壤管理实践如何，与雨育条件相比，灌溉增加了产量和修剪重量。土壤管理对葡萄树的营养状况有轻微影响。在实验结束时，由于覆盖和免耕，土壤压实增加，入渗减少。有机覆盖和免耕改善了葡萄树的水分状况，然而，考虑到最终的土壤表面压实和低渗水率，需要长期研究来评估结合这两种做法的可持续性。