Plant–soil feedback (PSF) and diversity–productivity relationships are important research fields to study drivers and consequences of changes in plant biodiversity. While studies suggest that positive plant diversity–productivity relationships can be explained by variation in PSF in diverse plant communities, key questions on their temporal relationships remain. Here, we discuss three processes that change PSF over time in diverse plant communities, and their effects on temporal dynamics of diversity–productivity relationships: spatial redistribution and changes in dominance of plant species; phenotypic shifts in plant traits; and dilution of soil pathogens and increase in soil mutualists. Disentangling these processes in plant diversity experiments will yield new insights into how plant diversity–productivity relationships change over time.

植物-土壤反馈 (PSF) 和多样性-生产力关系是研究植物生物多样性变化的驱动因素和后果的重要研究领域。虽然研究表明植物多样性 - 生产力的积极关系可以通过不同植物群落中 PSF 的变化来解释，但关于它们的时间关系的关键问题仍然存在。在这里，我们讨论了在不同植物群落中随时间改变 PSF 的三个过程，以及它们对多样性-生产力关系的时间动态的影响：空间重新分布和植物物种优势的变化；植物性状的表型变化；土壤病原体的稀释和土壤互惠者的增加。在植物多样性实验中解开这些过程将产生关于植物多样性-生产力关系如何随时间变化的新见解。