Little information is available about the effects of different species of shrubs on the composition of the soil seed bank (SSB) in the semiarid regions. We determined the role of three dominant shrub species on SSB characteristics and evaluated their potential for their possible use in rangeland restoration projects. Fifteen sites, each containing three shrub species (Amygdalus scoparia, Daphne mezereum and Ebenus stellata) and a herbaceous patch (control) in close proximity, were sampled and their SSB density, species richness and diversity at 0–10 cm depth were determined. The results showed that the density of the SSB was highest under A. scoparia and lowest in the control. The highest SSB density of grasses was found under A. scoparia, while the highest SSB density of forbs was found under E. stellata. Species diversity of the SSB was significantly greater under E. stellata than under the other shrubs and control. This study revealed that the extent to which shrubs affected SSB characteristics did not only depend on the presence of shrubs, but also on the species of shrubs. These different roles of different species of shrubs on SSB are advised to be considered in the restoration of degraded areas through the SSB in the semiarid areas. In the case of changing management type from intensive grazing to extensive grazing or non‐grazing, the role of different shrub species in the conservation herbaceous species through their SSB can be different.

中文翻译：

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半干旱地区与不同灌木树种相关的土壤种子库特征

关于半干旱地区不同灌木对土壤种子库（SSB）组成的影响的信息很少。我们确定了三种优势灌木物种在SSB特征上的作用，并评估了它们在牧场恢复项目中的潜在用途。十五位点，每一个含有三个灌木（扁桃猪毛，芫花mezereum和Ebenus斯泰拉塔）和在靠近一个草本补丁（对照），进行取样和它们的SSB密度，品种丰富多样在0-10厘米深度进行了测定。结果表明，SSB的密度是最高的下黄蒿和最低的控制。在以下条件下发现草的最高SSB密度A. scoparia，而在E. stellata下发现最高的SSB密度。星状大肠杆菌下SSB的物种多样性明显高于其他灌木和对照。这项研究表明，灌木影响SSB特性的程度不仅取决于灌木的存在，还取决于灌木的种类。建议在半干旱地区通过SSB恢复退化地区时，应考虑不同种类灌木在SSB上的这些不同作用。在将管理类型从集约放牧改变为广泛放牧或不放牧的情况下，不同灌木物种通过其SSB在保护性草本物种中的作用可能会有所不同。