In recent decades, moisture‐based subsurface drip irrigation management strategies lead to water savings while maintaining strawberry yields in open fields. Most soils in the Québec City area are characterized by a high proportion of schist fragments and high hydraulic conductivity, causing substantial water losses following irrigation. Until now, little was known about the efficiency of soil‐moisture‐based irrigation strategies used on moderately coarse‐textured soils and their potential to improve water use efficiency (WUE). The first objective of this study was to test two tensiometer‐based irrigation managements for strawberry plants grown in a conventional system. Since field fumigation is increasingly restricted in field‐grown strawberries, we designed a raised‐bed trough system for use in the field and tested its productivity potential. The two irrigation methods included two treatments using pulsed irrigation: one with a constant irrigation threshold of −15 kPa (Pl), and the other with a variable threshold (−15/−30 kPa) adjusted daily to the predicted crop evapotranspiration (PlETc), in addition to a soilless treatment (SL) using a peat substrate and an irrigation threshold of −5 kPa. Compared to conventional irrigation, the PlETc treatment increased the WUE by 8 to 44% while maintaining marketable yields and fruit quality. Thus, this pulsed irrigation strategy is recommended for strawberry plants grown in clay loam soils. Strawberry plants grown in the soilless system gave 73 to 98% higher early marketable yield than soil cultivation. These results may encourage North American farmers to consider the soilless raised‐bed trough system as a viable alternative to conventional strawberry production systems.

中文翻译：

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基于张力计的灌溉计划和田间草莓的水分利用效率

近几十年来，基于水分的地下滴灌管理策略导致节水，同时保持空地的草莓产量。魁北克市地区的大多数土壤都以片岩碎片比例高和导水率高为特点，灌溉后造成大量的水损失。到目前为止，对于中等质地的土壤使用基于土壤水分的灌溉策略的效率及其提高水利用效率（WUE）的潜力知之甚少。这项研究的第一个目标是测试两种基于张力计的灌溉管理方法，以对常规系统中种植的草莓进行灌溉。由于田间种植的草莓对田地熏蒸的限制越来越大，因此我们设计了用于田间的高架槽系统，并测试了其生产力潜力。两种灌溉方法包括两种使用脉冲灌溉的处理方法：一种具有恒定的灌溉阈值-15 kPa（Pl），另一种具有可变的阈值（−15 / -30 kPa），每天根据预测的作物蒸散量（PlETc）进行调整。 ，以及使用泥炭基质和-5 kPa灌溉阈值的无土处理（SL）。与常规灌溉相比，PlETc处理使WUE增加了8％至44％，同时保持了适销的产量和水果品质。因此，这种脉冲灌溉策略建议用于在粘土壤土中生长的草莓植物。与土壤栽培相比，在无土系统中生长的草莓植物早期的可销售产量高73％至98％。