The least limiting water range (LLWR) has been used as a soil structural quality indicator for identifying in‐season water dynamics, yet studies focusing on its use for detecting in‐season water stresses and their effect on crop response on severely compacted subsoils are scarce. The objectives of this study were, therefore, to examine the in‐season water dynamics on a tile‐drained soil with compacted subsoil in the light of two different approaches for calculating LLWR (standard LLWR by da Silva et al. [1994] and refined LLWR by Pulido‐Moncada & Munkholm [2019]) and to evaluate the crop response to aboveground and belowground conditions. Information on LLWRs was obtained from soil sampling in the most contrasting treatments of a compaction experiment: with and without compaction. In‐season water dynamics were measured from 2017 to 2019. The refined LLWR approach defined a wider range of water content nonlimiting for plant growth compared with the da Silva et al. approach. Compaction affected the LLWRs (p < .05), yet no significant effect of subsoil compaction on crop yield was found. Cumulative aeration and water stress day indicators identified from the refined LLWR were significantly related to grain yield (p < .05). The lower winter wheat yield in 2018 compared with 2019 seemed to be related to the direct impact of weather factors on aboveground growth and to aeration and water stresses. The apparent lack of compaction effect suggests further studies are needed to determine if in‐season stresses derived from the LLWRs can be related to crop development and yield under different soil and weather conditions.

中文翻译：

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限制水域范围：与季节土壤水动力学，天气状况和地下土壤压实有关的作物响应

最小极限水位范围（LLWR）已被用作确定季节内水动力学的土壤结构质量指标，但针对其用于检测季节内水分胁迫及其对严重压实的深层土壤对作物响应的影响的研究很少。因此，本研究的目的是根据两种不同的计算LLWR的方法（da Silva等人，1994年的标准LLWR，并进行改进LLWR（Pulido-Moncada＆Munkholm [2019]），并评估作物对地上和地下条件的反应。LLWR的信息是从压实实验中最有差异的处理方法中的土壤采样中获得的：带压实和不带压实。对2017年至2019年的季节水动力学进行了测量。与da Silva等人相比，改进的LLWR方法定义了更宽的水分含量范围，而不受植物生长的限制。方法。压实影响了LLWR（p  <.05），但未发现下层土壤压实对农作物产量的显着影响。从精制的LLWR中确定的累积通气和水分胁迫日指标与谷物产量显着相关（p  <.05）。与2019年相比，2018年冬小麦单产下降似乎与天气因素对地上生长的直接影响以及通气和水分胁迫有关。压实效应的明显缺乏表明在不同土壤和天气条件下，低水位压降产生的季节胁迫是否可能与作物生长和单产相关，还需要进一步的研究。